Table 1.

Clinical details relating to HRAs and all THAs in 52,810 hips

A	B	C	D	E	F	G	H	I	J
HRA	4,401	3.5 (0–8.7)	55 (9–85)	66	2001–2009	46	11 (1–104)	54	92
All THAs	48,409	3.9 (0–9.0)	68 (14–85)	42	2001–2009	78	69 (1–493)	57	94

A Hip device

B n

C Mean follow-up (range)

D Mean age (range)

E % Males

F Implanting period

G No. of hospitals

H Mean volume (range) of operations per hospital per year over the study period

I Operated side, % right

J Diagnosis, % primary osteoarthritis