Malnutrition corresponds to an inadequacy between calorie and protein intake and the body’s needs [1]. This is a public health problem that not only affects developing countries; it also affects the population of developed countries [2]. In most cases, malnutrition in hospitalized patients results from acute or chronic illness and can also be idiopathic (e.g., long-term corticosteroid therapy, diuretics, chemotherapy, radiotherapy, etc.) [3][4]. Furthermore, it leads to a doubling of readmissions and increases the time required to return to work; it is a major factor in the development of certain diseases and in the increased morbidity and mortality of many pathologies [4]. The treatment plan involves an interprofessional team (dietitians, physiotherapists, nurses, nursing assistants, and physicians) and is based on dividing meals into smaller portions, combined with appropriate oral nutritional supplements (ONS) and micronutrient supplements. Nutritional monitoring will be supplemented by weight measurement and albumin testing [5]. Indeed, according to North American and European studies, the prevalence of malnutrition ranges from 10% to over 60%, depending on the populations studied, the criteria used, and the thresholds employed [6].

At the University Hospital of Strasbourg in 2019, Dos Reis C found that among patients with nosocomial infections, 49.9% were malnourished [7]. Thirty-two (32) studies conducted in 14 countries covering the five regions of the African continent reported that undernutrition was highest in the Central African Republic (33.4%) and lowest in South Africa (3.4%) by Mabiama in 2022 etal. [8] In Niger, Aminou et al. in 2020 found that the prevalence of malnutrition among cancer patients was estimated at 66.70% [2]. In Burkina Faso, Kambire et al. in 2021 reported a prevalence of 20.7% at admission and 28.3% at discharge for patients undergoing emergency digestive surgery [9]. In Lomé, Togo, Apeti et al. in 2023 found a prevalence of malnutrition and a risk of malnutrition of 87% [10]. In Benin, Mizéhoun-Adissoda et al. in 2022 reported that malnutrition was observed in 46.67% of hospitalized patients in Cotonou [11]. In Guinea in 2022, Millimono, in a cross-sectional study conducted among the elderly, reported a prevalence of malnutrition of 14.4% [12]. Thus, the high prevalence of malnutrition in hospital settings and the significant complications and costs associated with underlying comorbidities motivated the choice of this study.

This was a prospective and dynamic descriptive study lasting six (6) months from December 1, 2024 to May 31, 2025. We included in our study all patients aged 17 years and over hospitalized for weight loss > 5% in 1 month, or >10% in 6 months, a BMI < 18 kg/m², serum albumin < 30 g/l, a reduction in meal intake greater than or equal to 50% for 7 days, reduced absorption associated with the use of the MNA (Mini Nutrition Assessment) tool, and a single criterion was sufficient to confirm malnutrition, having consented to the study and answered our questionnaires without distinction of sex or origin during our study period. For data collection, we used a pre-established survey form incorporated into the Kobocollect application, and patients’ medical records contained the following items: sociodemographic and epidemiological characteristics. Then the data were entered and analyzed using SPSS Statistics software version 21. The data were collected anonymously, confidentiality was respected, and the free and informed consent of the patients was obtained.

Figure 1. Patient flow diagram for hospitalized patients in the internal medicine department.

During the study period, we collected data on 694 patients, including 151 cases of malnutrition, representing 21.8% (Figure 1).

Table 1. Distribution of patients hospitalized for malnutrition according to age groups.

Average age: 64.6 years ± 16.1 years. Extremes: 17 and 104 years.

The average age of the patients was 64.6 years ± 16.1 years, with extremes from 17 to 104 years, and the most represented age group was 60 - 79 years (45.7%) (see Table 1).

Figure 2. Distribution of hospitalized patients by sex.

During our study, we observed a female predominance (60.30%) (See Figure 2).

Table 2. Distribution of hospitalized patients according to marital status.

In our series, the majority of patients were married (59.6%), followed by widowers (34.4%) (See Table 2).

Table 3. Distribution of hospitalized patients according to reasons for hospitalization.

In our study, weight loss accounted for 67.6% of the reasons for consultation (Table 3).

Patients presented with an ABI at stage 3, representing 79.5% (Table 4).

According to the WHO criteria,

-Severe malnutrition BMI < 16 kg/m² (15.3%);

-Moderate BMI between 16 and 16.9 kg/m² (4.6%);

-Slight BMI 17 - 18.4 kg/m² (80.1%) (See Table 5).

Table 4. Distribution of hospitalized patients according to the performance indices (WHO).

Table 5. Distribution of hospitalized patients according to body mass index.

Figure 3. Distribution of patients hospitalized for malnutrition according to serum albumin levels.

The majority of malnourished patients had an albumin level ≥ 35 g/l (Figure 3).

Table 6. Distribution of patients hospitalized for malnutrition according to etiology.

The most common etiology was hepatocellular carcinoma (33.1%), followed by gastric cancer (15.9%). The Internal Medicine Department houses the only gastroenterology unit in the country, and there is no preclinical screening for liver diseases (Table 6).

The parenteral route was the most used, at 58.30% (Figure 4).

Weight improvement compared to admission within 1 month, representing 85.4% (Table 7).

Figure 4. Distribution of hospitalized patients according to nutrient administration routes.

Table 7. Distribution of patients hospitalized for malnutrition according to their condition upon discharge.

During the study period, we collected data on 694 patients, including 151 cases of malnutrition (21.8%). Millimono et al. in Guinea in 2021 reported 14.4% of malnutrition cases in their study. Shuremu et al. [13] in Ethiopia in 2023 found 53.8% of malnutrition cases. Mallé N’pie [14] in Mali in 2023 had reported 53.8%. The mean age of the patients was 64.6 years ± 16.1 years, with a range from 17 to 104 years; the most dominant age group was 60 - 79 years (45.7%). This result corroborates the findings of Muscaritoli et al. [15] in 2022, who showed that elderly patients were more susceptible to malnutrition. Similarly, Apeti et al. [10] in 2023 noted a range of 60 - 74 years (49%), while Mabiama et al. [16] reported a mean age between 65.0 and 79.7 years and 75 - 84 years (35.5%). This could be explained by the fact that malnutrition is a multifactorial condition and that the elderly constitute a vulnerable population, sometimes presenting several comorbidities. In our study, we observed a female predominance (60.30%). Kéïta [17] also noted a female-to-male ratio in admissions for malnutrition. Botero et al. [18] found a slight male predominance, which may reflect sociocultural and nutritional differences depending on the context. Clinically, it is essential to consider sex during nutritional assessment, as some risk factors may be specific. In our series, the majority of patients were married (59.6%), followed by widowers (34.4%). In our study, we observed that moderate malnutrition was predominant (80.13%). In our study, weight loss accounted for 67.6% of the reasons for consultation. This finding is consistent with data from the literature. According to WHO criteria, severe malnutrition is defined as a BMI < 16 kg/m²; moderate malnutrition as a BMI between 16 and 16.9 kg/m²; and mild malnutrition as a BMI between 17 and 18.4 kg/m². Millimono et al. had shown that low BMI is a major indicator of malnutrition and an unfavorable prognostic marker. Furthermore, Muscaritoli et al. had highlighted that a BMI < 18 kg/m² is strongly associated with increased morbidity, particularly in patients hospitalized in internal medicine [19]. These authors emphasize the need to supplement BMI measurement with a functional assessment (muscle strength, lean mass) to better assess the severity of malnutrition. Clinically, BMI remains a simple, reliable, and reproducible initial screening tool, especially in resource-limited settings where biochemical tests are sometimes unavailable. Volkert etal. [20] recommend parenteral nutrition when enteral or oral routes prove insufficient or impossible, particularly in cases of severe malnutrition. Bhasin et al. (2018) [21] reported similar results in the management of patients hospitalized in intensive care for severe malnutrition: parenteral nutrition led to a more rapid improvement in general condition and therapeutic tolerance. However, these authors emphasize the need for daily assessment of metabolic tolerance to prevent complications (hyperglycemia, fluid overload, catheter-related infection). The choice of nutritional route, therefore, depends on the clinical picture, the degree of malnutrition, and the patient’s digestive function. In stable situations, oral nutrition, combined with calorie and protein supplementation, remains the first-line option. Correia et al. (2021) [22] had demonstrated that fortified oral nutrition reduces hospital stays and improves functional recovery scores. In our setting, the short hospital stay observed can be attributed to early nutritional intervention, good treatment adherence, and patient motivation to regain satisfactory functional status. Weight improvement compared to admission was 85.4% within one month.

Malnutrition is a frequent complication in the Internal Medicine department and primarily affects elderly patients, with a mean age of 64.6 years ± 16.1 years and a female predominance. Early etiological diagnosis and multidisciplinary management are essential to improve the clinical condition of malnourished patients.

Summary, introduction, methods, results, discussion, and conclusion: Dr. Mohamed Cissoko, Dr. Mamadou Diakhaby, and Dr. Kalil Nouny Sidibé. First proofreading with suggestions and remarks: Dr. Mohamed Lamine Conté, Dr. Bamis Martin, Dr. Lanciné Kourouma, Dr. Aboubacar Dioubaté, Dr. Sâa Joseph Téliano, Dr. Mohamed Adama Oularé, Dr. Amara Magassouba, Dr. Kanté Mamadou Aliou II, Dr. Diallo Mamadou Tafsir, Dr. Idrissa Diallo, Dr. Abraham Geopogui, Dr. Oumar Camara, Dr. Abdourahmane Diallo, Dr. Elhadj Salmana Diallo, Dr. Amadou Baillo Barry, and Dr. Fatoumata Bah. Second proofreading and final correction before submission: Pr. Djibril Sylla and Pr. Amadou Kaké.