. 2019 Jan 1;10(3):602–610. doi: 10.7150/jca.28842

Table 3.

Multivariable Cox regression analysis with propensity score matching and coarsened exact matching method weighting

Surgery strategies	Propensity score matching cohort		Coarsened exact matching method weighted cohort
Surgery strategies	HR^a (95% CI)	P value	HR^b (95% CI)	P value
NS	Reference		Reference
GO	0.59 (0.51, 0.69)	<0.001	0.57 (0.43, 0.77)	<0.001
MO	0.94 (0.80, 1.10)	0.412	0.89 (0.65, 1.22)	0.464
SPM	0.60 (0.51, 0.70)	<0.001	0.50 (0.35, 0.72)	<0.001

^a After adjustment for age, year of diagnosis, primary tumor location and histology whose P value <0.05 in the univariable Cox regression analysis.

^b After adjustment for age, sex, race, SEER region, year of diagnosis, primary tumor location and histology whose P value <0.05 in the univariable Cox regression analysis.

Abbreviations: HR, hazard ratio; CI, confidence interval; NS, no surgery; SPM, surgery to both primary and metastatic tumor; GO, gastrectomy only; MO, metastasectomy only.