From: Rheumatoid arthritis and incident fracture in women: a case–control study
Rheumatoid arthritis (cases) | Non-rheumatoid arthritis (controls) | Chi-square test | ||||
---|---|---|---|---|---|---|
Observed | Expected | Observed | Expected | χ2value | p value | |
Primary osteoporotic sites | ||||||
Vertebral | 26 | 13.4 | 243 | 255.6 | 21.71 | <0.001 |
Colles’ | 6 | 10.8 | 211 | 206.2 | ||
Hip | 6 | 16.3 | 321 | 310.7 | ||
Other | 44 | 41.5 | 788 | 790.5 | ||
Sites adjacent to joints most commonly affected early in RA | ||||||
Colles’/Carpal/Hand/Fingers | 9 | 14.8 | 288 | 282.2 | 3.02 | 0.22 |
Foot/Toes | 4 | 4.2 | 81 | 80.8 | ||
Other | 69 | 63.0 | 1,194 | 1200 |