<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE article  PUBLIC "-//NLM//DTD Journal Publishing DTD v3.0 20080202//EN" "http://dtd.nlm.nih.gov/publishing/3.0/journalpublishing3.dtd"><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" dtd-version="3.0" xml:lang="en" article-type="research article"><front><journal-meta><journal-id journal-id-type="publisher-id">OJD</journal-id><journal-title-group><journal-title>Open Journal of Depression</journal-title></journal-title-group><issn pub-type="epub">2169-9658</issn><publisher><publisher-name>Scientific Research Publishing</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.4236/ojd.2014.33013</article-id><article-id pub-id-type="publisher-id">OJD-48621</article-id><article-categories><subj-group subj-group-type="heading"><subject>Articles</subject></subj-group><subj-group subj-group-type="Discipline-v2"><subject>BIOMEDICAL &amp; LIFE SCIENCES</subject><subject>MEDICINE &amp; HEALTHCARE</subject><subject>SOCIAL SCIENCES &amp; HUMANITIES</subject></subj-group></article-categories><title-group><article-title>Depression in Resident Physicians: A Systematic Review</article-title></title-group><contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Nasheel</surname><given-names>Joules</given-names></name><xref ref-type="aff" rid="aff1"><sup>1</sup></xref></contrib><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Daniel</surname><given-names>M. Williams</given-names></name><xref ref-type="aff" rid="aff2"><sup>2</sup></xref><xref ref-type="corresp" rid="cor1"><sup>*</sup></xref></contrib><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Alexander</surname><given-names>W. Thompson</given-names></name><xref ref-type="aff" rid="aff2"><sup>2</sup></xref></contrib></contrib-group><aff id="aff1"><addr-line>Texoma Medical Center, Denison, TX, USA</addr-line></aff><aff id="aff2"><addr-line>Department of Psychiatry and Behavioral Science, Texas A &amp; M Health Science Center College of Medicine, Scott and White Hospital, Temple, TX, USA</addr-line></aff><author-notes><corresp id="cor1">* E-mail:<email>drdanielwilliams@gmail.com(DMW)</email>;</corresp></author-notes><pub-date pub-type="epub"><day>08</day><month>08</month><year>2014</year></pub-date><volume>03</volume><issue>03</issue><fpage>89</fpage><lpage>100</lpage><history><date date-type="received"><day>20</day>	<month>May</month>	<year>2014</year></date><date date-type="rev-recd"><day>27</day>	<month>June</month>	<year>2014</year>	</date><date date-type="accepted"><day>15</day>	<month>July</month>	<year>2014</year></date></history><permissions><copyright-statement>&#169; Copyright  2014 by authors and Scientific Research Publishing Inc. </copyright-statement><copyright-year>2014</copyright-year><license><license-p>This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/</license-p></license></permissions><abstract><p>Objective: To complete a systematic review of the literature addressing major depression in resident physicians. Methods: In 2013, the authors completed a systematic review of articles addressing major depression in physicians in United States residency programs. The following keywords were used: anxiety, stress, and mood, medical residents or interns, physician residents, graduate medical education, depression, stress or anxiety, and suicide. Results: The prevalence of depression in resident physicians is higher than that of the general population. Many sociodemographic and residency-associated factors have been studied in their relation to resident physician depression. Only physical health, an unhappy childhood, and stress at work were found to have association with depression, while the amount of call, lifestyle, age, income, and season of the year were not associated with depression. Other factors had an equivocal relationship. Depression in resident physicians is associated with medical errors, decreased ability to handle work-related stress, leaves of absence, discontinuation of medical training, disruption in personal lives, and suicide. Intervention with treatment for depression, using a low-cost, confidential, off-campus program, was successful. However, physicians may hesitate to seek treatment for mental illness because of the professional consequences, such as difficulty with medical licensing, hospital privileges, and malpractice insurance. Conclusions: Major depression is common in resident physicians in the United States. It has a negative impact on the lives of the doctors and the patients whom they treat. There appear to be effective ways of assisting residents with major depression available to training programs.</p></abstract><kwd-group><kwd>Medical Residents</kwd><kwd> Major Depression</kwd><kwd> Systematic Review</kwd><kwd> Physician Health</kwd></kwd-group></article-meta></front><body><sec id="s1"><title>1. Introduction</title><p>“On the thirteenth day of his internship…Dr. K went to a fifth floor hospital lounge where he was observed…pacing for several minutes periodically touching the thicker inner pane of window glass separated from an outer pane by a venetian blind…A few minutes later, when alone in the lounge, he lunged toward the window and dove through both panes to his death 60 feet below.”</p><p>—From Suicide and the Stress of Residency Training: A Case Report and Review of the Literature. Psychological Reports, 1989 (Kirsling et al., 1989).</p><p>Depression is a common, often untreated illness that has a devastating impact on interpersonal and workplace functioning. The National Comorbidity Survey replication study found a 16% lifetime prevalence of major depressive disorder and 6.6% prevalence in the 12 months prior to the survey. Nearly 97% of those reporting major depression in the past year reported at least 35 days where they were unable to function due to depression (Kessler et al., 2003). Employees with depression have more sick days, less productivity, and are more likely to get terminated (Katon, 2009).</p><p>Many studies have shown that depression or emotional impairment in resident physicians is more common than that in the general population and result in patient care errors, leaves of absence, career changes, or suicide (Collier et al., 2002; Craig et al., 1968; Fahrenkopf et al., 2008; Reuben, 1985; Revicki et al., 1993; Smith et al., 1986; West et al., 2006; West et al., 2009). The potential public health implications of this are apparent considering the nature of resident physicians’ work and the potential loss of future healthcare providers.</p><p>Our goal is to describe the current literature addressing major depression in resident physicians in a narrative fashion that will allow the reader to better understand its risk factors. This systematic review will address the incidence and prevalence of resident physician depression, sociodemographic and residency program factors associated with depression, the apparent consequences of depression in residents, the approaches to screening treatment that have been studied, and a discussion of possible barriers to the access and receipt of treatment.</p></sec><sec id="s2"><title>2. Methods</title><p>PubMed, Psych-Info, Academic Search Premier, and CINAHL were searched for English language articles with any publication date addressing depression in resident physicians. A study was included if it was conducted in the United States, specifically addressed depression in resident physicians, discussed sociodemographic or residency program factors associated with depression, or addressed consequences of depression, including suicide.</p><p>The following MeSH terms were used to search PubMed: internship and residency, and depression, or suicide, with keywords anxiety, stress, and mood. The terms used in the remaining databases included: medical residents or interns, physician residents, graduate medical education, depression, stress or anxiety, and suicide. Studies were excluded because they addressed only resident “burnout,” “fatigue,” “stress,” “anxiety,” or generalities such as “mood” or “emotional distress;” contained data related to physicians, but not specifically to resident physicians; were conducted outside of the United States; or were commentaries.</p></sec><sec id="s3"><title>3. Results</title><p>The initial search of all databases yielded 120 articles, with 8 articles overlapping in the different searches, leaving 112 articles for review. After initial abstract review, 31 articles were excluded from the PubMed search, and 49 were excluded from the Psych-Info, Academic Search Premier, and CINAHL databases search. The abstracts of the reference articles of the final 32 articles were reviewed and those that addressed depression in resident physicians were also included in this review, adding 14 more articles for a total of 46 articles for this literature review.</p><sec id="s3_1"><title>3.1. Prevalence of Depression in Resident Physicians</title><p><xref ref-type="table" rid="table1">Table 1</xref> includes articles attempting to describe the prevalence of depression in resident physicians. Overall, prevalence from these studies ranged from 1% to 56% (Becker et al., 2006; Clark et al., 1984; Collier et al., 2002; Fahrenkopf et al., 2008; Ford et al., 1984; Godenick et al., 1995; Goebert et al., 2009; Goitein et al., 2005; Gopal et al., 2005; Hainer et al., 1998; Hendrie et al., 1990; Hillhouse et al., 2000; Katz et al., 2006; Kirsling et al., 1989; Pasnau et al., 1971; Pasnau et al., 1975; Reuben, 1985; Revicki et al., 1993; Rosen et al., 2006; Russell et al., 1975; Samuel et al., 1991; Schneider et al., 1993; Sen et al., 2010; Valko et al., 1975; Yi et al., 2006). The</p><table-wrap id="table1"  position="float"><object-id pub-id-type="pii">Table 1</object-id><label>Table 1</label><caption><p>. Summary of studies addressing the prevalence of depression in resident physicians</p></caption><table><thead><tr><th align="center" valign="middle" >Title</th><th align="center" valign="middle" >Author/ Year published</th><th align="center" valign="middle" >Population studied</th><th align="center" valign="middle" >N</th><th align="center" valign="middle" >Depression  assessment tool</th><th align="center" valign="middle" >Percent of subjects reporting depression</th></tr></thead><tbody><tr><td align="center" valign="middle" >A prospective  cohort study  investigating  factors associated  with depression  during internship</td><td align="center" valign="middle" >Sen et al.<sup></sup> (2010)</td><td align="center" valign="middle" >Internal medicine,  Family medicine,  General surgery,  Pediatrics, OB-Gyn,  and Psychiatry interns  at 13 US  hospitals</td><td align="center" valign="middle" >740</td><td align="center" valign="middle" >PHQ-9</td><td align="center" valign="middle" >Pattern of depression  through intern year: • Time 1 (beginning of  intern year): 3.9% • Time 2 (third month of intern year): 27.1% • Time 3 (sixth month of intern year): 23.3% • Time 4 (ninth month of intern year): 25.7% • Time 5 (end of intern year): 26.6% Overall prevalence: 19.5%</td></tr><tr><td align="center" valign="middle" >Depressive symptoms in medical students and residents: a  multischool study</td><td align="center" valign="middle" >Goebert et al. (2009)</td><td align="center" valign="middle" >Residents in  various fields at  six universities and  hospitals</td><td align="center" valign="middle" >532</td><td align="center" valign="middle" >CES-D</td><td align="center" valign="middle" >11.9%</td></tr><tr><td align="center" valign="middle" >Rates of medication errors among  depressed and burnt  out residents:  prospective  cohort study</td><td align="center" valign="middle" >Fahrenkopf  et al.<sup></sup> (2008)</td><td align="center" valign="middle" >Pediatric and  Medicine-Pediatric  residents at hospitals  in Boston, California, and Washington D.C.</td><td align="center" valign="middle" >123</td><td align="center" valign="middle" >HANDS</td><td align="center" valign="middle" >20%</td></tr><tr><td align="center" valign="middle" >Evolution of sleep quantity, sleep  deprivation, mood  disturbances,  empathy and burnout among interns</td><td align="center" valign="middle" >Rosen et al. (2006)</td><td align="center" valign="middle" >Internal Medicine  interns at University  of Pennsylvania</td><td align="center" valign="middle" >58 (time 1) 47 (time 2)</td><td align="center" valign="middle" >BDI-short form</td><td align="center" valign="middle" >Pattern of depression  through intern year: • Time 1 (beginning of intern year): 4.3% • Time 2 (end of intern year): 29.8%</td></tr><tr><td align="center" valign="middle" >Burnout, depression, and career satisfaction: cross-sectional study  of obstetrics and  gynecology residents<sup></sup></td><td align="center" valign="middle" >Becker et al. (2006)</td><td align="center" valign="middle" >OB-Gyn residents at  23 different programs  across the United States</td><td align="center" valign="middle" >125</td><td align="center" valign="middle" >CES-D</td><td align="center" valign="middle" >34.2%</td></tr><tr><td align="center" valign="middle" >Religion, Spirituality, and depressive  symptoms in primary care house officers<sup></sup></td><td align="center" valign="middle" >Yi et al. (2006)</td><td align="center" valign="middle" >Residents from  Pediatrics, Internal  Medicine-Pediatrics,  Internal Medicine,  Family Medicine at  University of Cincinnati</td><td align="center" valign="middle" >227</td><td align="center" valign="middle" >10 item CES-D</td><td align="center" valign="middle" >25%</td></tr><tr><td align="center" valign="middle" >Depression among  emergency medicine residents over an  academic year</td><td align="center" valign="middle" >Katz et al. (2006)</td><td align="center" valign="middle" >Emergency Medicine residents at a large,  urban teaching hospital</td><td align="center" valign="middle" >31</td><td align="center" valign="middle" >CES-D</td><td align="center" valign="middle" >12.1%</td></tr><tr><td align="center" valign="middle" >Burnout and Internal Medicine resident work-hour restrictions</td><td align="center" valign="middle" >Gopal et al. (2005)</td><td align="center" valign="middle" >Internal Medicine  residents at University  of Colorado Health  Science Center</td><td align="center" valign="middle" >Prior to work hour restrictions: 121, After work hour restrictions: 106</td><td align="center" valign="middle" >PRIME-MD</td><td align="center" valign="middle" >Residents who screened  positive for depression  decreased from 51% to 41%  after hours were restricted</td></tr><tr><td align="center" valign="middle" >The effects of work-hour limitations on resident well-being, patient care, and education in an  internal medicine  residency program<sup></sup></td><td align="center" valign="middle" >Goitein et al. (2005)</td><td align="center" valign="middle" >Internal Medicine  residents at the  University of  Washington</td><td align="center" valign="middle" >118</td><td align="center" valign="middle" >PRIME-MD</td><td align="center" valign="middle" >45% screened positive for  depression before work hour  restrictions vs. 56% after  work hour restrictions</td></tr><tr><td align="center" valign="middle" >Stress in medical  residency: status  quo after a decade  of reform?<sup></sup></td><td align="center" valign="middle" >Collier et al. (2002)</td><td align="center" valign="middle" >Internal medicine  residents in programs throughout the United States</td><td align="center" valign="middle" >4128</td><td align="center" valign="middle" >Residents were asked about five depressive symptoms (appetite changes, mood  swings, decreased  recreational  activities, depressed mood, sleep  disturbance)</td><td align="center" valign="middle" >35% reported 4 of 5  symptoms of depression,  22% reported all 5 symptoms</td></tr><tr><td align="center" valign="middle" >Symptoms of  depression in residents: a South Carolina  family practice  research consortium  study</td><td align="center" valign="middle" >Hainer et al. (1998)</td><td align="center" valign="middle" >Family Medicine  residents at seven  residency programs  in South Carolina</td><td align="center" valign="middle" >268</td><td align="center" valign="middle" >BDI</td><td align="center" valign="middle" >7.4%</td></tr><tr><td align="center" valign="middle" >Physical and  psychological health  of family practice  residents</td><td align="center" valign="middle" >Godenick et al. (1995)</td><td align="center" valign="middle" >Family Medicine  residents in seven  residency programs  in South Carolina</td><td align="center" valign="middle" >178</td><td align="center" valign="middle" >BDI</td><td align="center" valign="middle" >89% with minimal  depressive symptoms, 10% with mild symptoms, 1% with moderate symptoms</td></tr><tr><td align="center" valign="middle" >Impact of work  environment  characteristics on  work-related stress  and depression in  emergency medicine  residents: a  longitudinal study</td><td align="center" valign="middle" >Revicki et al. (1993)</td><td align="center" valign="middle" >Emergency Medicine residents across the United States</td><td align="center" valign="middle" >556 1st yr  residents, 369 2nd yr  residents, 192 3rd yr residents</td><td align="center" valign="middle" >CES-D</td><td align="center" valign="middle" >27% first-year residents 23% second-year residents 22% third-year residents</td></tr><tr><td align="center" valign="middle" >Depression and anxiety in medical, surgical, and pediatric interns<sup></sup></td><td align="center" valign="middle" >Schneider et al. (1993)</td><td align="center" valign="middle" >Internal Medicine,  Surgery, and Pediatric interns at a community teaching hospital</td><td align="center" valign="middle" >38 (time 1), 33 (time 2), 32 (time 3), 32 (time 4)</td><td align="center" valign="middle" >SCL-90-R</td><td align="center" valign="middle" >• Pattern of depression through intern year: • Time 1 (beginning of intern year): 34.2% • Time 2 (fourth month of intern year): 42.4% • Time 3 (eighth month of intern year): 28.1% • Time 4 (end of intern year): 37.5%</td></tr><tr><td align="center" valign="middle" >Investigating stress levels of residents: a pilot study<sup></sup></td><td align="center" valign="middle" >Samuel et al. (1991)</td><td align="center" valign="middle" >Aneasthesiology,  Pediatric, and  Psychiatry residents  at a metropolitan  university hospital</td><td align="center" valign="middle" >113</td><td align="center" valign="middle" >BDI</td><td align="center" valign="middle" >16% with mild mood  disturbance, 1% with moderate  depression, 83% with  normal mood scores.</td></tr><tr><td align="center" valign="middle" >A study of  anxiety/depressive  symptoms of medical students, house staff,  and their  spouses/partners</td><td align="center" valign="middle" >Hendrie et al. (1990)</td><td align="center" valign="middle" >Housestaff  (department not  specified) at a  Midwestern hospital</td><td align="center" valign="middle" >227 residents</td><td align="center" valign="middle" >Questionnaire  asking residents to quantify how often they feel depressed, on a Likert  scale-from most of the time, to never</td><td align="center" valign="middle" >18% reported feeling  depressed much or most of  the time since beginning residency.</td></tr><tr><td align="center" valign="middle" >An evaluation of  mood states among  first-year residents</td><td align="center" valign="middle" >Kirsling et al. (1989)</td><td align="center" valign="middle" >Interns in various  specialties at Medical  College of Wisconsin</td><td align="center" valign="middle" >58 (4 of those participated in personal interview)</td><td align="center" valign="middle" >BDI, personal interview</td><td align="center" valign="middle" >15.5%</td></tr><tr><td align="center" valign="middle" >Depressive symptoms in medical house  officers. Effects of  level of training and  work rotation<sup></sup></td><td align="center" valign="middle" >Reuben (1985)</td><td align="center" valign="middle" >All residents at  Brown University</td><td align="center" valign="middle" >727</td><td align="center" valign="middle" >CES-D</td><td align="center" valign="middle" >Overall 21.4% 28.7% first year residents 21.5% second year residents 10.3% third year residents</td></tr></tbody></table></table-wrap><p>Continued</p><table-wrap id="table2"  position="float"><object-id pub-id-type="pii">Table 2</object-id><label>Continued</label><caption><p>Continued</p></caption><table><thead><tr><th align="center" valign="middle" >The internship year: a study of sleep, mood states, and  psychophysiologic  parameters</th><th align="center" valign="middle" >Ford et al. (1984)</th><th align="center" valign="middle" >Interns of different  specialties at Vanderbilt</th><th align="center" valign="middle" >27</th><th align="center" valign="middle" >POMS and personal interview</th><th align="center" valign="middle" >14.8%</th></tr></thead><tbody><tr><td align="center" valign="middle" >Predictors of depression during the first 6 months of internship<sup></sup></td><td align="center" valign="middle" >Clark et al. (1984)</td><td align="center" valign="middle" >Internal Medicine,  Surgery, OB-Gyn,  Pediatric interns at a midwestern university</td><td align="center" valign="middle" >55</td><td align="center" valign="middle" >BDI and personal interview</td><td align="center" valign="middle" >Pattern of depression  through internship: 10% at start of internship, 7% 6 months into intern year. 27% reported an episode of major depression between the beginning and end of intern year.</td></tr><tr><td align="center" valign="middle" >Depression in the  Internship<sup></sup></td><td align="center" valign="middle" >Valko et al. (1975)</td><td align="center" valign="middle" >Internal Medicine,  Surgery, Pediatrics,  Ophthalmology,  Dermatology,  Radiology, Neurology  interns at a Missouri  hospital</td><td align="center" valign="middle" >53</td><td align="center" valign="middle" >Feighner criteria,  personal interview  by psychologist</td><td align="center" valign="middle" >30%</td></tr></tbody></table></table-wrap><p>BDI = Beck Depression Inventory; CES-D = Center for Epidemiologic Studies Depression Scale; HANDS = Harvard national depression screening day scale; PHQ-9 = Patient Health Questionnaire; POMS = Profile of Mood States; PRIME-MD = Primary Care Evaluation of Mental Disorders; SCL-90-R = Symptom Checklist-90-Revised.</p><p>largest study evaluated 4128 internal medicine residents, with 22% to 35% reporting between four to five symptoms of depression (Collier et al., 2002). One study evaluated 740 interns at US hospitals, 20% of whom reported depression (Sen et al., 2010). Among three cohorts of emergency medicine residents across the United States, 27% of 556 first-year residents, 23% of 369 second-year residents, and 22% of 192 third-year residents screened positive for depression (Revicki et al., 1993). Depression was reported by 21% of 727 first, second, and third year residents at Brown University (Reuben, 1985). The remaining studies in <xref ref-type="table" rid="table1">Table 1</xref> were based at only one institution or included a smaller number of participants.</p></sec><sec id="s3_2"><title>3.2. Incidence and Severity of Depression in Resident Physicians</title><p>In a study involving 740 interns, 4% were depressed at the start of internship, 27% reported depression by the end of the first quarter, and 26% by the end of internship (Sen et al., 2010). In a study of 55 residents, 10% reported depression at the start of internship and 7% six months into the internship year (Clark et al., 1984).</p><p>Nine studies examined the change in depression severity throughout intern year. Five of those studies found that the level of depression peaked anywhere between the third and eighth months of intern year, and lowered by the end of intern year; however, scores never lowered to baseline (Bellini et al., 2002; Bellini et al., 2005; Elliot et al., 1986; Girard et al., 1986; Sen et al., 2010). In one study, depression severity continued to rise throughout intern year, with no improvement at the end of the year. The remaining three studies did not find any change in severity of depression during the intern year (Ford et al., 1984; Gordon et al., 1986; Uliana et al., 1984). In a cohort of 43 residents followed throughout their residency, depression severity peaked during the intern year, improved significantly during the second and third years, but never decreased to baseline (Girard et al., 1991).</p></sec><sec id="s3_3"><title>3.3. Sociodemographic and Residency Program Factors Associated with Depression in Resident Physicians</title><p><xref ref-type="table" rid="table2">Table 2</xref> summarizes factors studied in relation to depression. We have detailed findings below.</p><sec id="s3_3_1"><title>3.3.1. Residency Program Factors</title><p>Level of training. Some studies suggest that junior residents are more likely to be depressed, with the most depression occurring during internship year at 28%, decreasing to 21% during second year, and to 10% during third year (Reuben, 1985; Revicki et al., 1993). Other studies reported no association between depression and level of training (Becker et al., 2006; Fahrenkopf et al., 2008; Goebert et al., 2009; Hainer et al., 1998; Hendrie et al., 1990).</p><table-wrap id="table3"  position="float"><object-id pub-id-type="pii">Table 3</object-id><label>Table 2</label><caption><p>. Sociodemographic and residency program factors associated with depression in resident physicians</p></caption><table><thead><tr><th align="center" valign="middle" >FACTOR</th><th align="center" valign="middle" >ASSOCIATION</th></tr></thead><tbody><tr><td align="center" valign="middle" >Physical health</td><td align="center" valign="middle" >Y</td></tr><tr><td align="center" valign="middle" >Unhappy childhood</td><td align="center" valign="middle" >Y</td></tr><tr><td align="center" valign="middle" >Stress at work<sup>*</sup></td><td align="center" valign="middle" >Y</td></tr><tr><td align="center" valign="middle" >Amount of call</td><td align="center" valign="middle" >-</td></tr><tr><td align="center" valign="middle" >Lifestyle†</td><td align="center" valign="middle" >-</td></tr><tr><td align="center" valign="middle" >Age</td><td align="center" valign="middle" >-</td></tr><tr><td align="center" valign="middle" >Income</td><td align="center" valign="middle" >-</td></tr><tr><td align="center" valign="middle" >Season of year</td><td align="center" valign="middle" >-</td></tr><tr><td align="center" valign="middle" >Level of training</td><td align="center" valign="middle" >Y/N</td></tr><tr><td align="center" valign="middle" >Hours worked</td><td align="center" valign="middle" >Y/N</td></tr><tr><td align="center" valign="middle" >Amount of sleep/sleep  deprivation</td><td align="center" valign="middle" >Y/N</td></tr><tr><td align="center" valign="middle" >Difficulty/type of rotation</td><td align="center" valign="middle" >Y/N</td></tr><tr><td align="center" valign="middle" >Previous history of depression</td><td align="center" valign="middle" >Y/N</td></tr><tr><td align="center" valign="middle" >Family history of mental illness</td><td align="center" valign="middle" >Y/N</td></tr><tr><td align="center" valign="middle" >Negative religious coping<sup>‡</sup></td><td align="center" valign="middle" >Y/N</td></tr><tr><td align="center" valign="middle" >Stressors outside work</td><td align="center" valign="middle" >Y/N</td></tr><tr><td align="center" valign="middle" >Gender</td><td align="center" valign="middle" >Y/N</td></tr><tr><td align="center" valign="middle" >Ethnicity</td><td align="center" valign="middle" >Y/N</td></tr><tr><td align="center" valign="middle" >Marital status/social support</td><td align="center" valign="middle" >Y/N</td></tr><tr><td align="center" valign="middle" >Financial debt</td><td align="center" valign="middle" >Y/N</td></tr><tr><td align="center" valign="middle" >Y</td><td align="center" valign="middle" >All studies found this factor to be associated with depression</td></tr><tr><td align="center" valign="middle" >N</td><td align="center" valign="middle" >No studies found this factor to be associated with depression</td></tr><tr><td align="center" valign="middle" >Y/N</td><td align="center" valign="middle" >Some studies found an association with depression, some studies  failed to find an association with depression</td></tr></tbody></table></table-wrap><p><sup>*</sup>Hainer et al. 24 looked at perceived stress, Revicki et al. 10 used the work-related strain inventory to measure occupational stress; <sup>†</sup>Exercise and diet habits, alcohol intake; <sup>‡</sup>Negative religious coping is defined as spiritual discontent, reappraisals of God’s powers, spiritual abandonment, and poor spiritual well-being (not defined).</p><p>Amount of call. Studies have not shown a decrease in depressive symptoms following the ACGME duty hour restrictions on overnight call (Goebert et al., 2009; Sen et al., 2013; Valko et al., 1975).</p><p>Hours worked. To date, studies have not found a clear association between work hours and reports of depression (Goitein et al., 2005; Gopal et al., 2005; Stamp et al., 2005). In addition, four of the five studies addressing this did not find an association between depression and logged number of hours worked (Fahrenkopf et al., 2008; Katz et al., 2006; Kirsling et al., 1989; Sen et al., 2010; Valko et al., 1975).</p><p>Amount of sleep or sleep deprivation. In one study, residents with probable major depression slept 6.2 hours per night, and those without depression slept 6.64 hours per night (Goebert et al., 2009). Reporting less than six hours of sleep and becoming chronically sleep deprived was associated with depression (Godenick et al., 1995; Rosen et al., 2006). However, other studies did not find an association between depression scores and logged sleep hours (Fahrenkopf et al., 2008; Ford et al., 1984; Kirsling et al., 1989).</p><p>The difficulty or type of rotation. Residents reporting higher degrees of depression also ranked their current rotations as more difficult (Goebert et al., 2009). More depressive symptoms were reported on ICU, inpatient, and emergency room rotations (Reuben, 1985; Yi et al., 2006). One study did not find a relationship between depression and type of rotation (Valko et al., 1975).</p></sec><sec id="s3_3_2"><title>3.3.2. Residents’ Medical and Social History</title><p>Previous history of depression. Residents with a history of depression appear more likely to develop depression after starting residency (30.3% versus 9.6%) (Goebert et al., 2009; Katz et al., 2006). However, other studies report that a resident with a history of major depression did not evidence more depression than those without a history of depression (Clark et al., 1984; Kirsling et al., 1989).</p><p>Physical health. Studies have shown that the odds of having depression were increased in resident physicians reporting poor physical health and fitness (Godenick et al., 1995; Hainer et al., 1998; Yi et al., 2006).</p><p>Family history of mental illness. Resident physicians with a family history of depression had a higher occurrence of depression compared to those without (Clark et al., 1984; Goebert et al., 2009; Valko et al., 1975). However, one study did not report an association (Kirsling et al., 1989).</p><p>Childhood. The odds of having depression were increased in those with an unhappy or difficult childhood (Godenick et al., 1995; Hainer et al., 1998; Sen et al., 2010).</p><p>Religiosity. There is a significant relationship between depression, negative religious coping (including spiritual discontent, reappraisals of God’s powers, and spiritual abandonment) and poor spiritual well-being (Yi et al., 2006). However, in those with little or no religion, the prevalence of depression was not increased (Godenick et al., 1995).</p><p>Lifestyle. Exercise, diet habits, and amount of alcohol intake were not associated with depression (Becker et al., 2006; Hainer et al., 1998).</p></sec><sec id="s3_3_3"><title>3.3.3. Stress</title><p>Stress at work. Work-related stress for resident physicians was associated with increased symptoms of depression (Hainer et al., 1998; Revicki et al., 1993; Revicki et al., 1993). In one study, work-related strain inventory scores were the strongest predictors of depression (Revicki et al., 1993). Residents whose tasks and roles at work were not clearly defined had a higher occurrence of depression (Revicki et al., 1993).</p><p>Stressors outside work. Several studies did not find an association between depression and recent stressful life events, such as death in the family or geographic relocation prior to starting residency (Clark et al., 1984; Godenick et al., 1995; Hainer et al., 1998; Kirsling et al., 1989). However, in one study, higher depressive symptoms correlated with stressful life events, highlighting the interplay between stress and mood (Sen et al., 2010).</p></sec><sec id="s3_3_4"><title>3.3.4. Demographic Factors</title><p>Age. Resident age did not appear to be associated with depression (Becker et al., 2006; Fahrenkopf et al., 2008; Hainer et al., 1998; Revicki et al., 1993).</p><p>Gender. Several studies found that female residents were more likely to experience depression and with increased severity (Elliot et al., 1986; Goebert et al., 2009; Hendrie et al., 1990; Kirsling et al., 1989; Revicki et al., 1993; Sen et al., 2010). However, several other studies did not find a significant relationship between gender and depression (Becker et al., 2006; Clark et al., 1984; Fahrenkopf et al., 2008; Hainer et al., 1998; Katz et al., 2006; Koran et al., 1988; Revicki et al., 1993).</p><p>Ethnicity. Two studies analyzed ethnicity and resident physician depression and did not find a statistically significant relationship (Fahrenkopf et al., 2008; Goebert et al., 2009; Hainer et al., 1998). Another study showed higher depressive symptoms among European Americans (Fahrenkopf et al., 2008).</p><p>Marital status and social support. Several studies found that single residents or those who live alone had similar depression prevalence compared to those who were married (Becker et al., 2006; Clark et al., 1984; Fahrenkopf et al., 2008; Godenick et al., 1995; Hainer et al., 1998; Kirsling et al., 1989). However, other studies found that having low social support or being unmarried were associated with more symptoms of depression (Archer et al., 1991; Koran et al., 1988; Revicki et al., 1993).</p><p>Income. There was no reported association between depression and resident household income (Hainer et al., 1998).</p><p>Financial debt. Most studies did not find an association between depression and the level of indebtedness (Collier et al., 2002; Godenick et al., 1995; Hainer et al., 1998; Kirsling et al., 1989).</p><p>Season of year. In two studies, season of the year did not relate to resident physician depression (Hainer et al., 1998; Katz et al., 2006).</p></sec></sec><sec id="s3_4"><title>3.4. Possible Consequences of Depression in Resident Physicians</title><p>Between 2003 and 2006, residents at the Mayo Clinic self-reported their rate of perceived medical errors. Sixty-three percent of those who reported errors screened positive for depression (West et al., 2006). In another study, medication errors for depressed residents was 1.55 per month compared to 0.25 for non-depressed residents (Fahrenkopf et al., 2008).</p><p>Depressed residents are more likely to find sleep deprivation, fatigue, working hours, and lack of time to provide good patient care as significantly more stressful than non-depressed residents (Kirsling et al., 1989). Residents who are depressed are more likely to continue working despite presence of any illness, have greater difficulty concentrating at work, and work in impaired conditions more than twice a month (Fahrenkopf et al., 2008). Among internal medicine residents across the United States between 1979 through 1984, 1% required leaves of absence secondary to emotional impairment, 23% of which were diagnosed with depression. Of those impaired, 10% dropped out of medicine completely (Smith et al., 1986).</p><p>Depression in resident physicians also appears to lead to career dissatisfaction (Becker et al., 2006; Girard et al., 1986; Gordon et al., 1987; Hainer et al., 1998). Residents dissatisfied with their career choice in medicine were twice as likely to be depressed (Becker et al., 2006).</p><p>Depression in residents also appears to affect life outside of work. Marital problems were reported by 46% of the depressed interns versus 7% of the non-depressed (Valko et al., 1975).</p><p>Suicide is a devastating consequence of depression in resident physicians. A study looking at emotional impairment in housestaff reported that 3% of those “emotionally impaired” attempted suicide and an additional 2% completed suicide. In that study, “emotionally impaired” referred to depression as well as other psychiatric disorders; however, the majority of the emotionally impaired were diagnosed with depression (Smith et al., 1986). In 1973, the suicide rate for residents was 18 per 100,000 per year (Kelly, 1973). This rate is higher than the general population but hasn’t been studied systematically since that time. Depressed residents are at an increased risk for suicide because they are prone to a failed sense of belonging, perceived burdensomeness, and an acquired ability to self-harm. A thwarted sense of belongingness stems from training environments that are not always conducive to obtaining adequate levels of social support. Residents may be prone to feeling emotionally burdensome as a result of depression. Finally, residents become habituated to the suffering associated with self-injury and death. Additionally, they are familiar with properties and lethal dosing of medications (Cornette et al., 2009).</p></sec><sec id="s3_5"><title>3.5. Treatment of Depression in Resident Physicians</title><p>Fortunately, a growing number of programs targeting resident depression have been evaluated in recent years. At UCLA, the Mental Health Program for Physicians in Training offered an off-campus location that operated autonomously and provided confidential, affordable evaluation and treatment of psychiatric illnesses (Borenstein, 1985). Ninety-eight percent of residents (n = 89) who sought help did so voluntarily. Utilization was highest during the first and third years of residency. Depression was diagnosed in 62.9% of those who sought treatment. The treating psychiatrists reported that 96% of residents who received long-term treatment showed benefit (Borenstein, 1985). In another reported treatment model, a surgery residency employed a staff psychologist. The psychologist provided stress-management education and identified residents with performance issues. Therapeutic counseling was the primary intervention recommended. Of twelve impaired residents described in the report, two changed careers before completing residency, two required inpatient treatment for addiction, and the remainder completed residency in good standing (Veldenz et al., 2003). This may be interpreted as a good outcome.</p><p>Regarding treatment preference for depressed residents, one study described that eighty percent of residents would attend support groups if in psychological distress, and would talk with a spouse, family member, friend, or fellow intern, and exercise or engage in other recreational activity as coping methods. Residents did not describe being interested in talking with an attending physician, program director, or discussing concerns at a staff conference (Kirsling et al., 1989). In addition, 60% felt coping skills or stress management seminars would be useful, and between 30% to 60% said they would use confidential psychotherapy (Samuel et al., 1991). Although up to 20% of residents felt the need for counseling, only 2% received it, which was due to insufficient time, concerns over confidentiality or finances, worries over the stigma attached, and not knowing where to get help (Koran et al., 1988).</p></sec></sec><sec id="s4"><title>4. Discussion</title><p>Despite the importance of this topic, both for the welfare of physicians and their patients, our knowledge about depression in resident physicians remains incomplete. It could be argued that what we found overestimates the prevalence of resident physician depression. For example, findings consisted of primarily observational studies with small sample sizes based on single institutions with depression defined by a variety of screening tools. The use of self-report screening tools would allow a critical reviewer to argue that a diagnosis of depression (even in larger samples) cannot be made, unless validated against structured interviews. Our review is limited by the biases inherent in survey research (e.g., response bias and recall bias). Uniform criteria for defining “depression” were not used in all studies. Despite these limitations, it is also reasonable to suggest that depression in resident physicians is underestimated. Residents have admitted to answering questions inaccurately and presenting themselves in a more positive light out of fear of lack of confidentiality and subsequent negative performance evaluations (Samuel et al., 1991).</p><p>Resident physician depression is a public health problem. If the prevalence of resident physician depression is approximated at 20%, there are 107,851 residents in the United States, and 21,570 residents in training who may be suffering from depression (ACGME, 2009). We can hope that the only consequence of untreated depression in a resident physician is a lowered quality of life for him or her. However, evidence would suggest that work performance may be decreased appreciably. On medical wards and intensive care units, poor work is translated into possible human injury and death (Clark et al., 1984; Fahrenkopf et al., 2008; Valko et al., 1975; West et al., 2006).</p><p>Physicians commit suicide at a rate greater than the general population (Schernhammer et al., 2004). It is well known that depression is a major risk factor for suicide, and we have seen that resident physicians appear to suffer from depression and suicide more than the general population. Despite this, residents may not receive depression treatment for fear of negative performance evaluations and medical licensing problems (Center et al., 2003; Samuel et al., 1991). Those fears are not unfounded. Licensing boards are more likely to inquire about psychiatric disorders than physical conditions, and there is concern that practicing physicians with psychiatric disorders may encounter discrimination when trying to obtain a medical license, hospital privileges, health insurance, and malpractice insurance (Association, 1984; Center et al., 2003; Hansen et al., 1998).</p><p>If depressed residents are at risk of killing patients and/or themselves, why there is so little discussion in the literature about managing this problem? We described the details of at least one program that appeared effective at helping depressed residents. Is the problem that effective programs are not present for residents depressed in distress? Or, is it complex social and professional barriers that stand between a depressed resident and effective treatment? It is unacceptable to imagine a medical training system where a physician would view suicide as more palatable than the personal or professional consequences of acknowledging a common and treatable mood disorder.</p><p>While there is no clear evidence that risk factors for resident depression are different than the general population, the need for confidential screening and treatment programs is clear. A good place to start may be with providing better treatment options for substance use disorders because of their increased prevalence among resident physicians and the association with negative mental health outcomes. A better epidemiologic understanding of depression in residents will improve our evidence base and hopefully translate into even more exemplary models of care for training physicians. 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