516-P: Objective and Subjective Physical and Mental Health Benefits in Older Adults with Cardiometabolic Risk after Diabetes Prevention Program (DPP)-Based Lifestyle Intervention

Physical function, health-related quality of life (HRQoL), and depressive symptoms are key outcomes for older adults (≥65y) enrolled in behavioral weight management, but less is known about relationships among these variables. We evaluated associations between changes in these measures after a 1-year DPP-based lifestyle program. Participants (N=322) were M±SD age 71.2y±4.3, BMI 33.8±5.1, 77% women, 13% Black, averaged 4 chronic conditions, and 31% had prediabetes. Most took blood pressure (67%) and lipid (52%) medications. Participants attended 12 in-person weekly groups, then were randomized to continued monthly contact by phone or newsletter, losing 7.4% (CI) (-8.9, -5.9) and 6.1% (-8.6, -3.6) of weight at 1 year, respectively. Goals included reducing calorie/fat intake, increasing lean protein, ≥150 minutes aerobic activity/week, and strength training. Physical function was measured via Short Physical Performance Battery (SPPB) gait speed, chair rise, and balance tests, perceived HRQoL via SF-12 Physical and Mental Component Summary (PCS and MCS), and mood via Center for Epidemiologic Studies Depression Scale (CES-D) at pre- and post-intervention. Associations between baseline-12 month changes in SPPB, HRQoL and CES-D were estimated in mixed-effect models. SPPB improved by 0.3±1.4 (p=0.001) in phone and 0.3±1.7 (p=0.02) in newsletter. Increased SPPB was associated with improved PCS (β=1.18, SE=0.20, p