Total Water Intake and Beverage Variety in Older Adults: A Cross-Sectional Study on Social Capital and Quality of Life in Greece

Older adults face unique challenges related to hydration, particularly within the context of psychosocial determinants. This study aimed to examine the associations between total water intake (TWI), beverage variety, social capital, and health-related quality of life. We hypothesized that their ability to access, purchase, prepare, and drink a variety of beverages towards optimal TWI is affected by their physical/mental health and social support. To test the hypothesis, a cross-sectional design was implemented. We evaluated TWI, social capital, and Health-Related Quality Of Life, using the Water Balance Questionnaire, Social Capital Questionnaire, and SF-36, respectively, in 890 free-living participants (49.6% male), aged >65 years, recruited in Metropolitan Athens and Crete, Greece. TWI, 80% from beverages, was 2.6 ± 0.7 L in men and 2.4 ± 0.8 L in women and was associated with beverage variety (4.1 ± 1.0 in men, 3.9 ± 1.1 in women). Social capital, mental health, and variety of beverages were significant predictors of TWI; for each increased unit of the aforementioned predictors, TWI increased to 9.1, 6.8, and 183.5 mL, respectively. Spatial and gender differences were observed in social capital score and its components and in Health-Related Quality Of Life and its components, thus reflecting differences in social support and in functional health, plausibly linked to barriers/enablers to TWI. These findings highlight the potential importance of addressing psychosocial factors to support hydration in older adults.