Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13019-021-01749-8/MediaObjects/13019_2021_1749_Fig1_HTML.png)
Survival outcomes. Kaplan–Meier estimation of VATS group showed better overall survival and similar recurrence-free survival than the thoracotomy group in unmatched cohort. a After propensity score matching (1:1), the survival curve showed that there were no significant differences in overall and recurrence-free survivals between the VATS and thoracotomy groups. b VATS, video-assisted thoracoscopic surgery; CI, confidence interval