Social Support and Weight Outcomes Over A Six-Month Weight Loss Intervention for Rural Older Adults
Abstract Rural older adults aged ≥65 years with obesity (body mass index (BMI) ≥30 kg/m2) showed an overall favorable response to a six-month, technology-based weight-management intervention. Our objective was to characterize how friends or family support for eating and exercise behaviors at baseline was associated with baseline weight and intervention response. We analyzed data from six subscales of the Social Support and Exercise Survey from 44 participants. Six-month weight change (≥5% of baseline) was considered clinically-significant. For each subscale, continuous and categorial outcomes were modeled with linear and logistic regression models, respectively, adjusted for sex and age. Crude associations of social support clusters, generated in an exploratory hierarchical cluster analysis, and weight outcomes were evaluated. The sample was 73.2 ± 3.9 years, 73% female, with mean baseline weight 97.8±16.3 kg and BMI 36.5±5.2 m/kg2. Family encouragement for healthy eating was negatively associated with baseline weight (β=-0.53, p=0.046). Social support scores were not associated with either six-month weight loss outcome (p>0.10). Two exploratory clusters were found: Cluster 1 (C1) (n=34) and Cluster 2 (C2) (n=9). C2 had higher mean social encouragement and discouragement, with lower mean baseline weight (90.0±11.7 vs 99.8±16.8kg C1; p=0.10). Weight loss was comparable (C1 4.6±3.7 versus C2 4.8±2.6kg; p=0.89), with no differences in clinically-significant weight loss (C1 45% versus C2 67%; p=0.46). These pilot data suggest that family member social support may act as collaterals to support clinical outcomes in the community. Evaluating different types within family support may elucidate associations with physiological outcomes in larger samples.