Background: Malnutrition is common in hospitalized patients and many undergo further deterioration of the nutritional level during the stay at the hospital. Patients who are malnourished on admission have a tendency to further depletion of nutrition level during the hospital stay. The aim of this study was to assess the weight changes of hospitalized patients during the hospital admission.

Methods: Body weight was measured on admission and discharge for two hundred and ninety four patients in a cardiology hospital. Body mass index (BMI) cut offs were used to categorized patients to underweight (BMI<18.5kg.m^-2), normal (18.5-22.9kg.m^-2), overweight (23.0-24.9kg.m^-2), obese (25.0-29.9kg.m^-2) and very obese.

Results: Study population included 190 (64.4%) males and 105 (35.6%) females. One hundred and twenty eight (43.4%) patients lost their weight, while 131 (44.4%) and 36 (12.2%) patients had gained and had no change in their weight respectively. Of the patients who had their BMI in the underweight category (26, 8.81%), most (15, 57.7%) gained their weight. In the normal BMI range (112, 37.97%) majority (51, 45.5%) gained their weight. In the category of overweight (64, 21.69%), half of the patients (32, 50.0%) lost their weight. Forty three patients (46.23%) who were in the obese or very obese category (93, 31.53%) lost their weight. Weight changes within different BMI categories were not statistically significant (P=0.19).

Conclusion: Two fifths of patients lost their weight during the hospital stay irrespective of the BMI categories.