Evaluation of a Produce Prescription Program for Patients With Diabetes: A Longitudinal Analysis of Glycemic Control

OBJECTIVE: Produce prescriptions have shown promise in improving diabetes care, although most studies have used small samples or lacked controls. Our objective was to evaluate the impacts of a produce prescription program on glycemic control for patients with diabetes. RESEARCH DESIGN AND METHODS: Participants included a nonrandom enrollment of 252 patients with diabetes who received a produce prescription and 534 similar control participants from two clinics in Hartford, Connecticut. The start of the COVID-19 pandemic in March 2020 coincided with program implementation. Produce prescription enrollees received vouchers (60 per month) for 6 months to purchase produce at grocery retail. Controls received usual care. The primary outcome was change in glycated hemoglobin (HbA1c) between treatment and control at 6 months. Secondary outcomes included 6-month changes in systolic (SBP) and diastolic blood pressure (DBP), BMI, hospitalizations, and emergency department admissions. Longitudinal generalized estimating equation models, weighted with propensity score overlap weights, assessed changes in outcomes over time. RESULTS: At 6 months, there was no significant difference in change in HbA1c between treatment and control groups, with a difference of 0. 13 percentage points (95% CI -0. 05, 0. 32). No significant difference was observed for change in SBP (3. 85 mmHg; -0. 12, 7. 82), DBP (-0. 82 mmHg; -2. 42, 0. 79), or BMI (-0. 22 kg/m2; -1. 83, 1. 38). Incidence rate ratios for hospitalizations and emergency department visits were 0. 54 (0. 14, 1. 95) and 0. 53 (0. 06, 4. 72), respectively. CONCLUSIONS: A 6-month produce prescription program for patients with diabetes, implemented during the onset of the COVID-19 pandemic, was not associated with improved glycemic control.