Predicting individual change in support over time among chronically impaired older adults.

Hierarchical linear modeling was used to examine the degree of individual change in friendship and family networks and support over time as a function of sociodemographic characteristics, rehabilitation use, and disability. Participants, 449 older adults, had age-related vision loss, a common, chronic impairment that tends to worsen over time. Three interviews were conducted (baseline and 6- and 18-month follow-ups). All network and support variables showed a decrease over time. Regarding factors predicting individual variation, age (younger) and education (lower) were associated with greater baseline friendship support, rehabilitation was related to maintaining a larger friend network, and disability was positively associated with family network and support. Results supported the importance of examining rates of individual change and factors associated with variability in multiple support components by relationship type.