Table 1. Demographic and perioperative features of the study patients.

Characteristics	Before PSM				After PSM
	ICC	No ICC	P value		ICC	No ICC	P value
Gender							0.683
Male	31	54			31	29
Female	19	81			19	21
Age	53.98±18.51	50.67±18.44	0.284		53.98±18.51	53.14±17.24	0.815
BMI	22.89±3.93	23.46±3.96	0.390		22.89±3.93	23.21±3.77	0687
FEV1	2.13±0.66	2.30±0.68	0.139		2.13±0.66	2.10±0.63	0.817
Type of Surgery			0.242				0.703
Wedge	30	66			30	28
Mediastinal tumor resection	6	30			6	9
Anatomic resection	14	39			14	13
Operative time	117.78±38.41	121.33±52.78	0.588		117.78±38.41	117.26±47.08	0.983
Drainage tube			<0.001				0.695
Pigtail	3	45			3	4
Chest tube	47	90			47	46
Oral anodyne			0.116				0.372
Acetaminophen	18	38			18	14
NSAID	19	74			19	26
Ultracet	13	23			13	10

ICC, intercostal catheter; PSM, propensity score matching.