. 2015 Jun 21;15:21. doi: 10.1186/s12880-015-0060-5

Table 5.

Logistic regression analysis of factors on diagnostic yield of TBB using EBUS-GS

Variables		HR	(95%CI)	p value
Visibility on Chest X-ray	Clearly visible	2.03	0.90–4.59	P = 0.087
Visibility on Chest X-ray	Vague or invisible	Ref.
CT bronchus sign^a	A	11.1	2.99–41.2	P < 0.001*
	B	4.62	1.24–17.2	P = 0.023*
	C	Ref.

* significant difference, ^a See Methods. Ref. reference