Table S1. Baseline characteristic of the 136 patients undergoing surgery.

Variables	Open surgery	Thoracoscopic surgery	P value
Gender (female/all)	27/66	37/70	0.163
Age (years)	53.2±13.96	49.89±14.69	0.181
HT	10/66	8/70	0.522
CAD	0/66	1/70	1
DM	5/66	2/70	0.392
Smoking	27/66	23/70	0.33
Drinking	17/66	16/70	0.693

HT, hypertension; CAD, coronary artery disease; DM, diabetes mellitus.