TABLE E1.

Surgical procedures in ever-smokers and never-smokers before and after matching

	Before matching			After matching
Procedure*	Never-smokers (n = 172) No. (%)	Ever-smokers (n = 1376) No. (%)	Standardized difference, %	Never-smokers (n = 169) No. (%)	Ever-smokers (n = 165) No. (%)	Standardized difference, %
Wedge resection	8 (4.7)	91 (6.6)	−8.5	7.5 (4.4)	9.4 (5.7)	−5.8
Thoracoscopic wedge resection	14(8.1)	152 (11)	−10	14 (8.3)	16 (9.6)	−4.7
Segmentectomy	5 (2.9)	50 (3.6)	−4.1	4.9 (2.9)	3.8 (2.3)	3.5
Thoracoscopic segmentectomy	6 (3.5)	28 (2.0)	8.9	6 (3.6)	3.3 (2.0)	9.6
Lobectomy	94 (55)	726 (53)	3.8	92 (54)	87 (53)	3.1
Thoracoscopic lobectomy	54 (31)	354 (26)	13	52 (31)	52 (31)	−0.61
Pneumonectomy	12 (7.0)	115 (8.4)	−5.2	12 (7.0)	9.4 (5.7)	5.6

^*Procedures are not mutually exclusive.