Effects of interventions may vary among participants. We explored whether participant characteristics were moderators of the effects of two cognitive behavioral interventions on concerns about falling (CaF) in older community-dwelling people. Secondary analyses of two RCTs were performed, concerning the group intervention A Matter of Balance - Netherlands (AMB-NL, n = 540) and individual AMB - Home (n = 389) intervention. Marginal models were used to assess moderation. Analyses included single moderator and multiple moderator models containing multiple moderators at once. A total of 19 characteristics were assessed. Moderating effects were found for living situation, fall history, symptoms of depression, perceived general health, ADL disability, cognitive status, and consequences of falling-loss of independence subscale. Effects varied by intervention, time point, and type of model.
Trial registration: ClinicalTrials.gov NCT01358032.
Keywords: Falls; concerns about falling; intervention; moderation; quantitative methods.