Table 5.

Age- and sex-stratified relative risk of revision. HRAs were compared to all THAs and to all cemented THAs implanted during the same period (2001–2009). Data are based on a Cox regression model adjusted for age, diagnosis, and type of implant

	A	B	C	D
Age ≤ 54 years
Males	0.83 (0.55–1.23)	0.3	0.55 (0.25–1.20)	0.1
Females	1.05 (0.74–1.49)	0.8	0.96 (0.47–1.95)	0.9
Age ≥ 55 years
Males	0.74 (0.54–1.01)	0.06	0.73 (0.50–1.08)	0.1
Females	1.38 (0.98–1.94)	0.06	1.36 (0.91–2.02)	0.1

A Adjusted RR^a of revision: HRA/all THAs (95% CI)

B p-value

C Adjusted RR^a of revision: HRA/all cemented THAs (95%CI)

D p-value

^a RR: See Table 4, footnote I.