Comparative Efficacy of a Two Daily Mixed Insulin Injection Versus a Basal-bolus Scheme With Human Insulin

Sequence (Premix first, then Humulin N + Humulin R): Subjects randomized to this sequence will receive premix insulin, twice per day for 16 weeks. After the first 16 weeks, subjects will cross over to the Humulin N plus Humulin R sequence for a further treatment of 16 weeks

Sequence (Humulin N + Humulin R first, then Premix): Subjects randomized to this sequence will receive basal bolus insulin scheme with Humulin N (twice daily) and Humulin R (before meals) for 16 weeks. After the first 16 weeks, subjects will cross over to the Premix sequence for a further treatment of 16 weeks