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Table 3 Cox proportional hazards model for first total joint replacement after one-year CRP observation (n = 1,230; 4.2% 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 B SE p HR 95% CI for HR
      Lower Upper
Age at index 0.061 0.012 0.000 1.06 1.04 1.09
1-year CRP change (cf. Low-Low)    0.203    
Low to High 0.623 0.504 0.217 1.86 0.69 5.01
High to Low 0.375 0.487 0.441 1.46 0.56 3.78
High-High 0.786 0.382 0.040 2.19 1.04 4.64
  1. Covariates not reaching threshold significance: gender; time to 1st CRP observation.
  2. Low CRP defined as ≤ 10 mmol/L; High CRP defined as >10 mmol/L
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