Table 1. Patients’ characteristics.

Variable	T1a (n=65)	T1b (n=94)	T2 (n=35)	P
Sex (male/female)	41/24	60/34	8/27	0.304
Age (y)	62.03±8.03	63.16±7.66	62.49±7.83	0.663
Duration of thoracic surgery (min)	48.77±7.18	48.30±8.38	46.86±7.58	0.503
Intraoperative blood loss (mL)	125.4±33.22	127.1±34.13	135.7±37.52	0.337
Dissected lymph node stations	2.77±1.54	3.30±1.65	3.40±1.44	0.067
Dissected lymph nodes	7.77±4.81	9.88±6.77	11.03±6.55	0.024
Positive rate of dissected lymph nodes [n (%)]	2 (3.1%)	15 (16.0%)	11 (31.4%)	0.001
Dissected mediastinal lymph nodes	3.48±4.20	4.55±6.40	4.83±4.27	0.363
Morbidity [n (%)]	11 (16.9%)	10 (10.6%)	5 (14.3%)	0.513