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Table 2 Comparison of rates and total volume of transfusion between two groups

From: Effects of intravenous iron monotherapy for patients with iron deficient anemia undergoing total knee arthroplasty

Outcome Group Crude PS matching
Event/n OR (95% CI) p-value Event/n OR (95% CI) p-value
Rate of transfusion Group I 8/45 0.949 (0.411, 2.190) 0.903a 8/45 0.754 (0.212, 2.686) 0.754b
Group C 41/221    9/45   
   Mean ± SD p-value Mean ± SD p-value
Volume of transfusion (mL) Group I 35.56 ± 77.33 0.602c 35.56 ± 77.33 0.791c
Group C 43.44 ± 94.94   40.00 ± 80.90  
  1. PS propensity score
  2. ap-value by simple Logistic regression; bp-value by conditional Logistic regression with adjusted variables in Table 1, cp-value by student’s t test