Introduction:
Aging is a significant problem, arising from the current demographics. The health aspects of aging are described as major geriatric problems, but an important issue is also malnutrition, especially among social welfare home residents. Malnutrition is conditioned by many factors, inter alia by multidiseases. The aim of the study was to analyze the nutritional status of SWH residents depending on comorbidities, age and sex.

Materials and methods:
The analysis included 107 patients (72 women, 35 men) aged 65–99 years, residing permanently in an SWH. To assess their nutritional status, the Mini Nutritional Assessment and biometric indicators were used. Information about chronic diseases was also collected. The results were analyzed in the Statistica 10.0 program.

Results:
Based on the data, it was found that only 22.4% of the group had a normal nutritional status, while as many as 33.7% suffered from malnutrition, and the results follow the same regardless of gender. The problem depends proportionally on the number of comorbidities and medication (p < 0.0001), whereas there was no association between poorer nutritional status and age of the patients (p > 0.05).

Conclusions:
This analysis show that malnutrition is result of multidiseases and medicines taken, and will also have a negative impact on the process of treatment of many chronic diseases.