Evaluation of the weight-increasing effects of biphasic analog and regular NPH insulin mixtures in patients with Type 2 diabetes mellitus.

Background: Weight gain is a significant problem in diabetic patients in terms of worsening glycemic control, increasing diabetic and cardiovascular morbidity and mortality, and contributing to social and psychological problems. In the present study, we evaluated the effects of a biphasic analog and regular NPH insulin mixtures on weight gain in patients with Type 2 diabetes mellitus (T2DM) over 1 year.

Methods: Group I consisted of 71 patients (29 men and 42 women) being treated with analog mixtures (insulin lispro 75/25 mix and biphasic insulin aspart 70/30 mix) twice daily; Group II consisted of 69 patients (23 men and 46 women) being treated with a regular insulin mixture (70/30) twice daily.