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Table 3 Hazard ratios for recurrent AF after catheter ablation according to CRP quartiles and continuous CRP levels

From: C-reactive protein for prediction of atrial fibrillation recurrence after catheter ablation

Variable CRP quartile Continuous
1a 2 3 4 Per unit increase in log CRP
Quartile value, mg/l < 0.8 0.8–1.4 1.5–2.7 > 2.7  
Hazard ratio unadjusted 1.0 1.23 1.10 1.59 1.19
 95% CI 0.86–1.76 0.78–1.62 1.13–2.25 1.04–1.35
P value 0.25 0.53 0.008 0.009
Hazard ratio adjusted for age and sex 1.0 1.24 1.09 1.54 1.17
 95% CI 0.87–1.77 0.75–1.57 1.09–2.18 1.03–1.34
P value 0.23 0.65 0.015 0.018
Hazard ratio adjusted for age and sex + additional factors 1.0 1.26 1.15 1.60 1.21
 95% CI 0.86–1.84 0.78–1.70 1.10–2.34 1.05–1.39
P value 0.24 0.48 0.014 0.009
  1. Models adjusted for additional factors controlled for body mass index, AF type (paroxysmal vs. persistent), history of hypertension (yes vs. no), history of heart failure (yes vs. no), history of obstructive sleep apnea (yes vs. no), duration of AF (years), and LAD
  2. Multivariable model included n = 659 patients
  3. aCRP Quartile 1 served as reference group for each comparison