Quality of care provided by general practitioners using or not using Division-based diabetes registers.

Objective: To compare the quality of care provided by general practitioners participating in diabetes shared-care registers with that provided by GPs not using registers.

Design: Cross-sectional comparison using Health Insurance Commission (HIC) data for patients attending the GPs.

Participants And Setting: 155 GPs using diabetes registers, 459 GPs not using registers, and their patients with diabetes (as identified by HIC criteria).