Table 3. Characteristics of ISP visualization.

Variables	Methylene blue group (n=62)	Modified inflation-deflation group (n=50)	P value
Time taken to visualize the inflation-deflation line (seconds)	82.94±28.08	868.20±145.89	<0.001
ISP visualization, n (%)			0.786
Good	59 (95.2)	47 (94.0)
Poor	3 (4.8)	3 (6.0)
Reasons for poor visualization, n
Methylene leakage	2	0
Severe anthracosis	1	0
Severe pleural adhesion	0	1
Emphysema	0	2

Continuous data are reported as mean ± standard deviation. ISP, intersegmental plane.