Comparative Effectiveness of Team-Based Care With and Without a Clinical Decision Support System for Diabetes Management

Background: Uncontrolled hyperglycemia, hypercholesterolemia, and hypertension are common in persons with diabetes. Objective: To compare the effectiveness of team-based care with and without a clinical decision support system (CDSS) in controlling glycemia, lipids, and blood pressure (BP) among patients with type 2 diabetes. Design: Cluster randomized trial. (ClinicalTrials.gov: NCT02835287) Setting: 38 community health centers in Xiamen, China. Patients: 11 132 persons aged 50 years or older with uncontrolled diabetes and comorbid conditions, 5475 receiving team-based care with a CDSS and 5657 receiving team-based care alone. Intervention: Team-based care was delivered by primary care physicians, health coaches, and diabetes specialists in all centers. In addition, a computerized CDSS, which generated individualized treatment recommendations based on clinical guidelines, was implemented in 19 centers delivering team-based care with a CDSS. Measurements: Coprimary outcomes were mean reductions in hemoglobin A1c (HbA1c) level, low-density lipoprotein cholesterol (LDL-C) level, and systolic BP over 18 months and the proportion of participants with all 3 risk factors controlled at 18 months. Results: During the 18-month intervention, HbA1c levels, LDL-C levels, and systolic BP significantly decreased by −0.9 percentage point (95% CI, −0.9 to −0.8 percentage point), −0.49 mmol/L (CI, −0.53 to −0.45 mmol/L) (−19.0 mg/dL [CI, −20.4 to −17.5 mg/dL]), and −9.1 mm Hg (CI, −9.9 to −8.3 mm Hg), respectively, in team-based care with a CDSS and by −0.6 percentage point (CI, −0.7 to −0.5 percentage point), −0.32 mmol/L (CI, −0.35 to −0.29 mmol/L) (−12.5 mg/dL [CI, −13.6 to −11.3 mg/dL]), and −7.5 mm Hg (CI, −8.4 to −6.6 mm Hg), respectively, in team-based care alone. Net differences were −0.2 percentage point (CI, −0.3 to −0.1 percentage point) for HbA1c level, −0.17 mmol/L (CI, −0.21 to −0.12 mmol/L) (−6.5 mg/dL [CI, −8.3 to −4.6 mg/dL]) for LDL-C level, and −1.5 mm Hg (CI, −2.8 to −0.3 mm Hg) for systolic BP. The proportion of patients with controlled HbA1c, LDL-C, and systolic BP was 16.9% (CI, 15.7% to 18.2%) in team-based care with a CDSS and 13.0% (CI, 11.7% to 14.3%) in team-based care alone. Limitation: There was no usual care control, and clinical outcome assessors were unblinded; the analysis did not account for multiple comparisons. Conclusion: Compared with team-based care alone, team-based care with a CDSS significantly reduced cardiovascular risk factors in patients with diabetes, but the effect was modest. Primary Funding Source: Xiamen Municipal Health Commission.