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Table 2 Cox proportional hazards model for first total joint replacement (n = 1,885; 3.6% events)

From: The association between C-reactive protein and the likelihood of progression to joint replacement in people with rheumatoid arthritis: a retrospective observational study

Variables in the Equation β SE p HR 95% CI for HR
      Lower Upper
Age at index 0.044 0.009 0.000 1.04 1.03 1.06
Ln mean CRP 0.307 0.106 0.004 1.36 1.10 1.67
Mean BMI 0.041 0.018 0.022 1.04 1.01 1.08
  1. Covariates not reaching threshold significance: gender; mean total cholesterol; mean BP; smoking history; cardiovascular morbidity; prior year GP attendance.
  2. β – parameter estimate; SE – standard error of β;p – statistical significance; HR – hazard ratio;
  3. CI – confidence interval.
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