INS and diabetes mellitus: Among 33,171 patients with diabetes, 2,269 (6.8%) were untreated prior to PCI admission, 2,049 (6.2%) were controlling diabetes through diet only, 16,396 (49.6%) were treated with oral agents without insulin, 12,205 (36.8%) were treated with insulin, and for 252 (0.8%) the treatment was unknown.