Delayed progression of diabetic retinopathy by divided insulin administration: a further follow-up.

We have previously reported a slower rate of progression in the number of microaneurysms in insulin dependent diabetic patients treated by divided insulin injections when compared to patients receiving a single daily insulin injection [Diabetes 25, 463--469 (1976)]. This observation is strengthened by the present analysis which uses complementary data obtained after a further year follow up: the mean yearly increase in the number of microaneurysms was 9 +/- 1 in the single injection group and 3 +/- 1 in the multiple one (p less than 0.001).