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Table 2 Covariate balance testing between unmatched and matched sample

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

Variable

Standardized difference [%]

% reduction |difference|

p-value

 

Unmatched

Matched

 

Unmatched

Matched

Age

8.1

0.1

98.3

0.03

0.97

No of grafts

-21.5

3.9

82.1

< 0.001

0.37

LIMA use

17.6

0.7

96.0

< 0.001

0.86

ECC-timeA

-38.3

1.4

96.5

< 0.001

0.72

Cross clamp time

-26.9

3.3

87.8

< 0.001

0.42

Reperfusion time

-39.4

-1.5

96.3

< 0.001

0.68

Body mass index

1.5

1.0

32.6

0.65

0.61

Body surface area

-16.6

4.0

76.0

< 0.001

0.36

Hypertension

15.2

-1.4

90.6

< 0.001

0.74

  1. A ECC extracorporeal circulation