Therefore, we shall investigate the effect of ICS, trying to understand its impact on the whole disease spectrum of insulin resistance. We shall begin with study on the risk of diabetes, then move on to that of impaired glucose tolerance (IGT) and finally to explore potential hyperinsulinemia in subjects with normal glucose tolerance who have used ICS. We will also put particular emphasis on the younger Chinese population, where the impact of age and obesity is less marked, and therefore, the effect of ICS on the risk of DM/IGT/ hyperinsulinemia can be better manifested and delineated.