Table 2.

Demographic and clinical data on the study cohort

A	B	C	D	E	F	G
1	OA	62	37	HR	Cormet	17
2	SUFE	48	101	HR	BHR	19
3	OA	68	142	HR	BHR	19
4	OA	57	85	HR	–	28
5	OA	51	61	HR	BHR	30
6	–	56	61	HR	Cormet	35
7	–	60	64	HR	Cormet	17
8	–	67	30	THR	Biomet (48 mm)	13
9	AVN	58	35	HR	Cormet	30
10	OA	63	77	HR	Cormet	18
11	–	71	35	THR	Biomet (40 mm)	16
12	–	55	42	THR	Wright	28
13	–	35	41	THR	ASR XL	11
14	–	57	42	THR	Cormet (54 mm)	39
15	OA	69	44	THR	Cormet (44 mm)	32
16	–	51	62	HR	Cormet	23
17	–	71	76	HR	Cormet	35
18	–	48	79	THR	Cormet (44 mm)	31
19	–	53	62	HR	–	40
Median		57 years	61 months
Mean						25 (SD 9)
		(IQR: 51–67)	(IQR: 41–77)			(CI: 21–29)

SD: standard deviation; CI: 95% confidence interval; IQR: interquartile range.

A Patient no.

B Diagnosis

  OA: osteoarthritis;

  SUFE: slipped upper femoral epiphysis;

  AVN: avascular necrosis;

C Age, years

D Time since primary operation, months

E Prosthesis type

  HR: hip resurfacing;

  THR: total hip replacement;

F Prosthesis model (femoral head size)

  BHR: Birmingham hip resurfacing;

  ASR XL: articular surface replacement;

G Oxford hip score (out of 48)