The General Practitioner Prompt Study to Reduce Cardiovascular and Renal Complications in Patients With Type 2 Diabetes and Renal Complications: Protocol and Baseline Characteristics for a Cluster Randomized Controlled Trial

Effects of an Electronic Software "Prompt" With Health Care Professional Training on Cardiovascular and Renal Complications in a Multiethnic Population With Type 2 Diabetes and Microalbuminuria (the GP-Prompt Study): Results of a Pragmatic Cluster-Randomized Trial

OBJECTIVE

Tight, targeted control of modifiable cardiovascular risk factors can reduce cardiovascular complications and mortality in individuals with type 2 diabetes mellitus (T2DM) and microalbuminuria. The effects of using an electronic "prompt" with a treatment algorithm to support a treat-to-target approach has not been tested in primary care.

RESEARCH DESIGN AND METHODS

A multicenter, cluster-randomized trial was conducted among primary care practices across Leicestershire, U.K. The primary outcome was the proportion of individuals achieving systolic and diastolic blood pressure (<130 and <80 mmHg, respectively) and total cholesterol (<3.5 mmol/L) targets at 24 months. Secondary outcomes included proportion of individuals with HbA_1c <58 mmol/mol (<7.5%), changes in prescribing, change in the albumin-to-creatinine ratio, major adverse cardiovascular events, cardiovascular mortality, and coding accuracy.

RESULTS

A total of 2,721 individuals from 22 practices, mean age 63 years, 41% female, and 62% from black and minority ethnic groups completed 2 years of follow-up. There were no significant differences in the proportion of individuals achieving the composite primary outcome, although the proportion of individuals achieving the prespecified outcome of total cholesterol <4.0 mmol/L (odds ratio 1.24; 95% CI 1.05-1.47; P = 0.01) increased with intensive intervention compared with control. Coding for microalbuminuria increased relative to control (odds ratio 2.05; 95% CI 1.29-3.25; P < 0.01).

CONCLUSIONS

Greater improvements in composite cardiovascular risk factor control with this intervention compared with standard care were not achieved in this cohort of high-risk individuals with T2DM. However, improvements in lipid profile and coding can benefit patients with diabetes to alter the high risk of atherosclerotic cardiovascular events. Future studies should consider comprehensive strategies, including patient education and health care professional engagement, in the management of T2DM.