Table 2

Pre-operative characteristics of joint replacement patients

Patient characteristic
Hip replacement
Knee replacement

NHS (N = 291)
ISTC (N = 184)
NHS (N = 323)
ISTC (N = 187)



Mean (SD)
Mean (SD)
Mean (SD)
Mean (SD)


Age (years)
66.2 (14.6)
66.8 (14.1)
66.2 (16.5)
66.7 (12.2)
Duration symptoms (years)
3.9 (5.4)
3.7 (3.9)
8.1 (10.1)
8.6 (9.3)
Deprivation score
22.4 (16.8)
20.3 (13.3)
25.2 (17.4)
19.0 (12.6)
EQ-5D score
0.31 (0.31)
0.35 (0.32)
0.36 (0.32)
0.45 (0.30)
Disease-specific score
44.0 (7.7)
42.1 (8.4)
42.3 (7.5)
39.8 (8.0)



N (%)
N (%)
N (%)
N (%)


Female
157 (54.1)
108 (58.7)
167 (52.0)
96 (51.6)
Any comorbidity
251 (86.2)
148 (80.4)
280 (86.7)
151 (80.7)
Previous similar surgery
79 (27.3)
34 (18.6)
168 (53.3)
78 (42.6)
Poor or fair health
62 (21.5)
27 (14.9)
68 (21.7)
21 (11.5)

Browne et al. BMC Health Services Research 2008 8:78   doi:10.1186/1472-6963-8-78