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Table 3 Estimated average treatment effects on several outcome variables

From: Reduced 30-day mortality in men after elective coronary artery bypass surgery with minimized extracorporeal circulation-a propensity score analysis

Comparison Outcome measures
ATTA 30-day mortality [%] ICU stay [days] Postoperative hospital stay [days] Postoperative neuro-cognitive dysfunction [%]
CECC versus MECC     
CECC (n = 2,020) 2.7 2.6 12.9 1.1
MECC (n = 1,119) 0.8 2.2 12.0 0.2
Unadjusted mean difference -1.9 -0.4 -0.9 -0.9
p-value < 0.001 < 0.001 < 0.001 0.003
Adjusted mean difference after matching of 1,005 pairs (95% confidence interval) -1.5 (-2.6 to -0.4) -0.38 (-0.80 to 0.00) -0.81 (-1.46 to -0.09) -1.3 (-2.2 to -0.4)
p-value 0.006 0.050 0.03 0.001
ATEB     
Adjusted mean difference with 95% bias corrected confidence interval -1.9 (-2.9 to -1.0)C -0.36 (-0.72 to 0.01)D -0.74 (-1.31 to 0.1)D -1.0 (-1.70 to -0.4)C
  1. A - ATT Average treatment effect for the Treated
  2. B - ATE Average treatment effect
  3. C - The 95% confidence interval does not include a zero, or p < 0.05 for a two-tailed test
  4. D - The 95% confidence interval does include a zero, or p > 0.05 for a two-tailed test