TABLE 3.

Multivariate analysis for risk of hip fracture and HT use

Risk factors	Hazard ratio (95% CI)	P
Model 1
No HT use in the previous yeara	1.55 (1.36–1.77)	<0.0001
Race
White	1.0
Black	0.51 (0.38–0.69)	<0.0001
Hispanic	0.74 (0.60–0.91)
Asian	0.44 (0.31–0.63)
Unknown	0.30 (0.24–0.37)
Other	0.51 (0.19–1.37)
Age (5-y increment)	1.97 (1.89–2.05)	<0.0001
Model 2 (adjusted for age and race)
Total no. of years not on HT after 2002a		<0.0001
0	1.0
1	1.16 (0.96–1.40)
2	1.52 (1.26–1.84)
3	1.64 (1.34–2.00)
4	1.68 (1.36–2.08)
≥5	1.77 (1.44–2.18)

HT, hormone therapy.

^aVariables considered time-dependent in Cox regression model.