Table 4B.

Statistics of logistic regression of chemotherapy on VATS successfulness

	success vs. failure		success vs. inadequate sampling
	p- value	OR (95% CI)	p- value	OR (95% CI)
chemo therapy (<=2 vs. >2 cycles)	0.7544	0.8 (0.2, 3.4)	0.0059	0.1 (0, 0.5)
age	0.7428	1.0 (0.9, 1.1)	0.6509	1.0 (0.9, 1.1)
gender (male vs. female)	0.1068	0.3 (0.1, 1.3)	0.3872	0.5 (0.1, 2.3)
histology (adenocarcinomar vs. others)	0.0598	3.8 (0.9, 15.6)	0.0273	7.2 (1.2, 41.4)

“Success” is equal to meeting protocol endpoints (i.e. disease found in pleura, disease in a mediastinal node, or 3 nodal stations sampled without disease). “Failure” is equal to not meeting protocol endpoints (i.e. biopsies were not obtained from 3 negative nodal stations or procedure aborted). “Inadequate sampling” means inability to sample 3 nodal stations secondary to the obliteration of nodal tissue.