American Diabetes Association

Table 2

Incidences of avascular necrosis of the femoral head stratified by sex and age between groups with and without diabetes

	Without diabetes				With diabetes
Variable	n	Event	Person-years	Incidence†	n	Event	Person-years	Incidence†	IRR#	95% CI
All	111,476	451	947,209	4.76	27,869	146	223,573	6.53	1.37	1.31–1.43
Sex
Female	50,052	188	446,238	4.21	12,513	53	105,641	5.02	1.19	1.11–1.27
Male	61,424	263	500,971	5.25	15,356	93	117,932	7.89	1.50	1.42–1.59
Age-group (years)
20–39	28,508	80	252,304	3.17	7,127	44	59,803	7.36	2.32	2.15–2.51
40–64	45,092	190	399,584	4.75	11,273	72	94,939	7.58	1.59	1.49–1.70
65–84	37,876	181	295,321	6.13	9,469	30	68,831	4.36	0.71	0.65–0.78

	Without diabetes				With diabetes
Variable	n	Event	Person-years	Incidence†	n	Event	Person-years	Incidence†	IRR#	95% CI
All	111,476	451	947,209	4.76	27,869	146	223,573	6.53	1.37	1.31–1.43
Sex
Female	50,052	188	446,238	4.21	12,513	53	105,641	5.02	1.19	1.11–1.27
Male	61,424	263	500,971	5.25	15,356	93	117,932	7.89	1.50	1.42–1.59
Age-group (years)
20–39	28,508	80	252,304	3.17	7,127	44	59,803	7.36	2.32	2.15–2.51
40–64	45,092	190	399,584	4.75	11,273	72	94,939	7.58	1.59	1.49–1.70
65–84	37,876	181	295,321	6.13	9,469	30	68,831	4.36	0.71	0.65–0.78

†Per 1,000 person-years.

#With diabetes vs. without diabetes.