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Incidence of bladder cancer in the study groups.
| Incidence | Control (n = 63,864) | DM (n = 31,932) |
|---|---|---|
| Follow-up person-months | 3,274,239 | 1,615,183 |
| New bladder cancer cases | 152 | 67 |
| Incidence (95% CI) * | 0.46 (0.40–0.54) | 0.41 (0.33–0.53) |
| Crude relative risk (95% CI) | Reference | 0.894 (0.670–1.191) |
DM: diabetes mellitus, n: number, CI: confidence interval. * Incidence per 10,000 person-months.
