Table 4:

Relation of hydropneumothorax on postdrainage chest radiograph with pleurodesis

Degree of lung expansion, %	No. (%) of catheters with pleurodesis	p value*
> 80 (n = 71)	47 (66)	< 0.001
51–80 (n = 94)	37 (39)	0.6
30–50 (n = 39)	8 (20)	0.006
< 30 (n = 24)	4 (17)	0.01

^*For comparison with all other inserted catheters; χ² test.