Table 3. Overall and age-specific incidence densities and relative hazards of endometrial cancer (ICD-9∶182) in the diabetes and control groups.

	Control Group			Diabetes Group			Crude HR (95% CI) in association with diabetes group	Adjusted HR† (95% CI) in association with diabetes group
	No. of subjects	No. of events	ID* (per 10,000 patient-years) (95% CI)	No. of subjects	No. of events	ID* (per 10,000 patient-years) (95% CI)
Age (years)
20–49	55602	77	0.16(0.12–0.20)	55601	134	0.28(0.24–0.34)	1.81(1.37–2.41)	1.85(1.36–2.50)
50–64	128389	188	0.17(0.14–0.19)	128389	246	0.23(0.21–0.27)	1.40(1.16–1.69)	1.64(1.34–2.02)
≧65	135317	107	0.10(0.08–0.12)	135318	140	0.15(0.13–0.18)	1.47(1.15–1.90)	1.67(1.28–2.19)
Total	319308	372	0.14(0.13–0.15)	319310	520	0.21(0.19–0.23)	1.52(1.33–1.74)	1.71(1.48–1.97)

ID, incidence density; CI, confidence interval; HR, hazard ratio; AHR, adjusted hazard ratio.

^*Based on Poisson assumption.

^†Based on Cox proportional hazard regression with adjustment for age, geographic area, urbanization status, Charlson’s score, history of hypertension, and frequency of medical visit.