Factors associated with the institutionalization of the elderly: a case-control study

Abstract Objective: to identify the factors associated with the institutionalization of the elderly. Method: a case-control, population-based study was performed with 387 elderly people. The study considered cases of elderly people (n=191) living in long-term care facilities, and a control group (n=196) who lived in homes in urban areas of the city. Both groups were identified from the records of the Family Health Strategy and were randomly selected. Institutionalization was considered a dependent variable, and sociodemographics, clinical factors, functional status, and cognitive impairment were considered independent variables. Comparison between groups was analyzed using the Chi-squared and Pearson tests and the logistic regression model was used in adjusted analysis, with measurements of effect expressed as odds ratio with a 95% confidence interval. Variables with p≤0.20 were considered for entry in the multiple model. Results: variables that remained associated with institutionalization in multiple analysis were: not having a partner (OR=9.7), not having children (OR=4.0), presenting cognitive impairment (OR=11.4), and depending on others to perform basic activities of daily living (OR=10.9). Conclusion: cognitive impairment and dependency for basic activities of daily living were more strongly associated with institutionalization. Home care strategies and preventive actions for risk factors should be stimulated to delay the referral of elderly people to Long Term Care Facilities for the Elderly, and to develop strategies that allow the elderly to remain socially active.