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Table 2 A chi-square test to identify the difference in CRP normalization at 2 weeks post operation

From: C-reactive protein course after classical complication free total knee arthroplasty using navigation

  CRP normal CRP abnormal Total P value
Group 1 (N = 269)) 94 (23.5%) 175 (43.8%) 269 (67.3%) 0.97
Group 2 (N = 131)) 46 (11.5%) 85 (21.3%) 131 (32.8%)
Total (N = 400) 140 (35.1%) 260 (65.0%) 400 (100.0%)  
  1. CRP C-reactive protein
  2. Group 1: unilateral total knee arthroplasty (TKA)
  3. Group 2: second-knee, staged bilateral TKA