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Table 2 Univariate associations of the inflammatory markers (ESR and CRP) with age, sex, and BMI at baseline

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

Univariate association* Unstandardized coefficient Standardized coefficient p-value
  Beta (95%CI) Standard error Beta (95%CI)  
ESR     
  Age 0.019 (0.014 - 0.024) 0.003 0.296 (0.219 – 0.373) <0.001
  Female sex 0.136 (-0.018 - 0.290) 0.078 0.072 (-0.009 – 0.152) 0.083
  Overweight 0.048 (-0.126 - 0.222) 0.088 0.026 (-0.067 – 0.118) 0.587
  Obese 0.190 (-0.027 - 0.407) 0.110 0.081 (-0.011 – 0.173) 0.086
CRP     
  Age 0.013 (0.007-0.020) 0.003 0.164 (0.084 – 0.244) <0.001
  Female sex -0.183 (-0.372 – 0.006) 0.096 -0.078 (-0.159 – 0.002) 0.057
  Overweight 0.248 (0.035 – 0.462) 0.109 0.108 (0.015 – 0.200) 0.023
  Obese 0.250 (-0.018 – 0.517) 0.136 0.086 (-0.006 – 0.179) 0.067
  1. *Analyses were performed on the naturally log-transformed ESR and CRP values to normalize their distributions.
  2. ESR = erythrocyte sedimentation rate, CRP = C-Reactive Protein, CI = confidence interval. The males and normal weight patients were used as reference categories.