Table 1
Hip replacement procedures
Ankylosing spondylitis
Osteoarthritis
1988–2002
2003–2010
p Value
1988–2002
2003–2010
p Value
n
360
174
53 782
41 312
Gender (% men)
76
70
0.14
31
32
<0.001
Mean age (years)
49.9
56.4
<0.001
71.0
70.5
<0.001