The Effectiveness of Enhanced Primary Healthcare (EnPHC) Interventions on Type 2 Diabetes Management in Malaysia: Difference-in-differences (DID) Analysis

Background To evaluate the effectiveness of the Enhanced Primary Healthcare (EnPHC) interventions on process of care and intermediate clinical outcomes among type 2 diabetes patients. Research Design and Methods This was a quasi-experimental controlled study of multi-pronged interventions conducted in 20 intervention and 20 control public primary care clinics in Malaysia from November 2016 to June 2019. Malaysian patients aged 30 years and above with a diagnosis of type 2 diabetes were selected via systematic random sampling. We conducted difference-in-differences analyses of data on process of care and intermediate clinical outcomes extracted from medical records. Results We reviewed 12,017 medical records of patients with type 2 diabetes. Process of care measures improved: HbA1c tests performed within the past three months (odds ratio (OR) 3.31, 95% CI 2.13, 5.13); lipid test (OR 4.59, 95% CI 2.64, 7.97), LDL (OR 4.33, 95% CI 2.16, 8.70), and urine albumin (OR 1.99, 95% CI 1.12, 3.55) tests within the past year; BMI measured within the past six months (OR 15.80, 95% CI 4.78, 52.24); cardiovascular risk assessment (OR 174.65, 95% CI 16.84, 1810.80); and exercise counselling (OR 1.18, 95% CI 1.04, 1.33). We found no statistically significant changes in intermediate clinical outcomes. Conclusions EnPHC interventions were effective in improving process of care but not intermediate clinical outcomes for type 2 diabetes patients. The intervention package was successful in enhancing the quality of care in diabetes from the health provider perspective. Patient engagement and self-management support may be needed to bring forth changes in patient outcomes.