INS and type 1 diabetes mellitus: Interestingly, insulin treatment was associated with a significantly increased risk of hospital admission in people with type 2 diabetes (OR 1.31; 95% CI, 1.06, 1.61) but a lower risk in people with type 1 diabetes (OR 0.14; 0.05, 0.35), although these results were based on a limited number of studies [14].