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Table 3 Observed and expected number of fractures at primary osteoporotic sites, and sites adjacent to the joints most commonly affected early in RA in the Barwon Statistical Division

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