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Table 2 Multivariable analysis of risk factors for low bone mineral density (BMD)

From: Rheumatoid arthritis and risk factors for low bone mineral density

Variable Comparison Spine, odds ratio (95% confidence interval) P Femoral neck, odds ratio (95% confidence interval) P
Menopause Premenopause 0.85 (0.42–1.74) 0.66 1.08 (0.52–2.52) 0.83
Ever HRT Never HRT 0.69 (0.22–2.16) 0.53 0.55 (0.17–1.76) 0.31
Disease duration      
   1–5 years < 1 year 0.95 (0.30–3.07) 0.94 2.31 (0.63–8.52) 0.21
   5 years < 1 year 1.22 (0.41–3.62) 0.72 4.83 (1.44–16.21) 0.01
Corticosteroids      
   Never Ever 0.87 (0.38–2.03) 0.75 0.69 (0.21–2.23) 0.54
   < 5 g cummulative Never 1.35 (0.37–4.89) 0.65 1.62 (0.45–5.89) 0.46
   >10 g cummulative Never 5.39 (1.95–14.86) 0.0001 3.73 (1.23–11.26) 0.02
  1. Low BMD, Z score < -1 compared with our normal population. HRT, hormone replacement therapy.