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Table 3 Mean changes in laboratory test values during exposure period from baseline

From: Comparative effect of clopidogrel and aspirin versus aspirin alone on laboratory parameters: a retrospective, observational, cohort study

Laboratory test Clopidogrel plus aspirin (n = 159) Aspirin alone (n = 834) p
  mean (95% CI) mean (95% CI)  
Δ WBC (103/μL)    
Unadjusted −1.65 (−2.099, -1.202) −0.455 (−0.651, -0.259) <0.0001*
Propensity adjustment −1.509 (−1.999, -1.018) −0.312 (−0.803, 0.179) 0.0008*
Multivariate model −1.832 (−2.317, -1.346) −0.435 (−0.634, 0.237) <0.0001*
  1. Δ indicates mean change in laboratory test value during exposure period from baseline. Data that showed a significant difference are presented. Abbreviations: WBC white blood cell count, CI confidence interval. *: p < 0.05 (aspirin plus clopidogrel vs aspirin alone).