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Table 3 Multivariate associations of the inflammatory markers (ESR and CRP) with age and sex at baseline (N = 589)

From: How age and sex affect the erythrocyte sedimentation rate and C-reactive protein in early rheumatoid arthritis

Variables* Unstandardized coefficient Standardized coefficient p-value
  Beta (95%CI) Standard error Beta (95%CI)  
ESR model     
  TJC28 -0.012 (-0.028 – 0.003) 0.008 -0.075 (-0.168 – 0.018) 0.115
  SJC28 0.044 (0.028 – 0.059) 0.008 0.256 (0.166 – 0.345) <0.001
  General health 0.006 (0.003 – 0.009) 0.001 0.170 (0.089 – 0.250) <0.001
  Female sex 0.198 (0.053 – 0.342) 0.073 0.104 (0.028 – 0.179) 0.007
  Age 0.017 (0.012 – 0.022) 0.003 0.262 (0.186 – 0.337) <0.001
CRP model     
  TJC28 -0.001(-0.020 – 0.018) 0.010 -0.006 (-0.100 – 0.089) 0.908
  SJC28 0.058 (0.039 – 0.077) 0.010 0.279 (0.188 – 0.370) <0.001
  General health 0.008 (0.004 – 0.011) 0.002 0.180 (0.098 – 0.262) <0.001
  Female sex -0.182 (-0.362 – -0.001) 0.092 -0.078 (-0.155 – -0.001) 0.048
  Age 0.009 (0.002 – 0.015) 0.003 0.108 (0.031 – 0.185) 0.006
  1. *ESR = erythrocyte sedimentation rate, CRP = C-Reactive Protein, TJC28 = tender joint count in 28-joints, SJC28 = swollen joint count in 28-joints. CI = confidence interval. R2 ESR-model: 18.7%, R2 CRP model: 16.2%.