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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