A randomized clinical trial of diabetes self-management for Mexican Americans: Are there serendipitous health benefits for supporters of study participants?

OBJECTIVES Studies of social support in diabetes have focused on the effects of support on the person with type 2 diabetes. We explored diabetes prevention effects of a culturally tailored diabetes self-management intervention in individuals without diabetes who were supporters of intervention participants. METHODS This is a secondary analysis of data from a randomized clinical trial that involved 256 Mexican Americans with diabetes. Each study participant designated a supporter-spouse, relative, friend-who attended intervention sessions and assisted participants in attaining effective diabetes self-management. Supporter's glycosylated hemoglobin (A1C) data were tracked for 1 year to determine diabetes conversion rates in supporters without diabetes at baseline. RESULTS Fewer individuals in the intervention group (n = 9) converted to an A1C above the 7% threshold, compared to the 1-year wait-listed control group (n = 16). We found a statistically significant difference (p = .021) at 12 months in the number of individuals whose A1C was ⩽8%, with fewer supporters above threshold in the intervention group (reduction of 48%). Supporters in the intervention group with prediabetes, based on baseline A1C, experienced a slight reduction in A1C, while control group supporters with prediabetes experienced an increase. DISCUSSION The results suggest that there are potential benefits for family members and other supporters of persons with diabetes who participated in diabetes self-management programs.