Table 3

Risk of fracture according to history of ankylosing spondylitis

Fracture typeAnkylosing spondylitisNo of casesNo of controlsCrude OR (95% CI)Adjusted OR* (95% CI)
AnyNo231436231362ReferenceReference
Yes4163421.22 (1.05 to 1.40)1.02 (0.88 to 1.18)
Radius/ulnaNo4413844119ReferenceReference
Yes82631.30 (0.94 to 0.81)1.21 (0.87 to 1.69)
HipNo1436214363ReferenceReference
Yes25260.96 (0.56 to 1.67)0.77 (0.43 to 1.37)
VertebralNo87018678ReferenceReference
Yes34113.08 (1.56 to 6.08)3.26 (1.51 to 7.02)
  • *Adjusted for medications and illnesses associated with risk of fracture (as outlined in the Methods section), and smoking and body mass index when known.

  • CI, confidence interval; OR, odds ratio.