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Table 3 Estimated average treatment effects on several outcome variables

From: Emergency coronary artery bypass grafting using minimized versus standard extracorporeal circulation – a propensity score analysis

Comparison Outcome measures
ATTA 30-day mortality [%] ICU-stay [days] Hospital stay [days] Low cardiac output [%]
CECC versus MECC     
CECC (n=175) 14.8 5.3 13 11.4
MECC (n=146) 6.9 4.6 12 5.6
Unadjusted mean difference −7.9 −0.8 −1 −5.8
p-value 0.03B 0.11 0.80 0.07B
Adjusted mean difference after matching of 100 pairs (95% bias corrected CI) −1.0 (−8.6 to 7.6) 1.0 (−0.21 to 3.24) 1.0 (−2 to 3.6) −1.1 (−7.3 to 7.1)
p-value 1.0C 0.70F 0.40F 0.83C
ATED     
Adjusted mean difference with 95% bias corrected CI) −1.5 (−8.1 to 5.8)E 0.61 (−0.7 to 2.2)E 0.34 (−2.5 to 2.6)E −1.7 (−7.1 to 6.5)E
  1. A – ATT Average treatment effect for the Treated.
  2. B – Fisher’s exact test.
  3. C – McNemar’s test.
  4. D – ATE Average treatment effect.
  5. E – The 95% bias corrected confidence interval does include a zero, or p > 0.05 for a two-tailed test.
  6. F – Wilcoxon’s signed rank test.