INS and type 2 diabetes mellitus: Among Chinese insulin-naïve patients with T2DM, those who initiated premixed insulin had lower per-day antidiabetic medication costs, lower total medical costs, and lower T2DM-related medical costs (mean differences of 4.17 RMB, 877.2 RMB, and 946.3 RMB, respectively) than those who started on long-acting insulin.