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Table 2 Propensity score matching description

From: Validity of upfront surgery for patients with unsuspected lymph node metastasis in esophageal cancer: a propensity scoring matching study

Covariates

Total Population

Propensity-matched Population

WL

(n = 160)

UL

(n = 55)

p-value

standardized difference

WL

(n = 55)

UL

(n = 55)

p-value

standardized difference

Age

63.5 ± 9.1

60.7 ± 6.7

0.014

−0.430

61.0 ± 9.4

60.7 ± 6.7

0.842

−0.046

Sex (Male)

144 (90%)

55 (100%)

0.014

N/A

55(100%)

55(100%)

N/A

N/A

NT

24(15%)

29(52.7%)

< 0.001

0.749

21(38.2%)

29(52.7%)

0.180

0.289

Ivro Lewis

146

45

0.080

0.242

42

45

0.640

−0.140

pT Stage

2.1 ± 1.0

3.0 ± 0.9

< 0.001

0.953

2.6 ± 1.1

3.0 ± 0.9

0.132

0.448