Trends over time in the deficit of (instrumental) activities of daily living in the Austrian population aged 65 years and older : Results from the Austrian Health Interview Survey series.

Background: Difficulties in activities of daily living (ADL) and instrumental activities of daily living (IADL) in older adults are associated with diminished quality of life and increased demand for long-term care. The present study examined the prevalence of disability among individuals aged 65 years and older in Austria, using data from the Austrian Health Interview Surveys (ATHIS).

Methods: The ATHIS 2014 and 2019 surveys were used (N = 5853) for the analysis. Binary logistic regression was performed to measure the association between disability in at least one ADL or IADL limitation and independent variables adjusted for sociodemographic, health-related behavior and survey year.

Results: The prevalence of ADL or IADL limitations increased in both sexes during the 5‑year follow-up period. For ADL limitations, the prevalence rose from 12.8% to 17.9% in men (p < 0.001) and from 19.2% to 25.7% in women (p < 0.001). The IADL limitations increased from 18.9% to 35.1% in men (p < 0.001) and from 38.2% to 50.8% in women (p < 0.001). Women reported significantly higher odds for ADL (odds ratio [OR]: 1.08, 95% confidence interval [CI]: 0.93-1.26) and IADL limitations (OR: 1.74, 95% CI: 1.53-1.98). In both sexes, participants aged 80 years and older reported higher odds for ADL (OR: 4.37, 95% CI:3.77-5.07) and IADL limitations (OR: 4.43, 95% CI: 3.86-5.09) compared to the younger group. Participants with at least one chronic disease reported higher odds for ADL (OR: 4.00, 95% CI: 3.41-4.70) and IADL limitations (OR: 4.37, 95% CI: 3.85-4.96). Primary education, single status, being born in non-EU/EFTA countries, and residing in Vienna were associated with higher odds of ADL and IADL limitations.

Conclusion: Gender, age, education, country of birth, residence, partnership status, number of chronic diseases, noncompliance with physical activity, and nutrition recommendations had a strong association with increased vulnerability to disability. Public health policy must address these factors for disability prevention strategies.