Table 1. Preoperative data.

	Bronchoscopic approach group		Invasive surgery group
	n	%	n	%	χ2	p
Preoperative chemotherapy
-	14	77.78	13	72.22
+	4	22.22	5	27.78	0.148	0.700
Total	18	100.00	18	100.00
Preoperative radiotherapy
-	11	61.11	13	72.22
+	7	38.89	5	27.78	0.125	0.724
Total	18	100.00	18	100.00
Postoperative chemotherapy
-	18	100.00	18	100.00
+	0	0.00	0	0.00
Total	18	100.00	18	100.00
Postoperative radiotherapy
-	1	5.56	14	77.78
+	17	94.44	4	22.22	16.457	<0.001
Total	18	100.00	18	100.00