Table 3.

Comparison of occurrence of complications

Groups	Lung infection	Hemorrhage	Atelectasis	Hydrothorax	Incidence of complications
Control group (n=44)	2 (4.55)	2 (4.55)	2 (4.55)	2 (4.55)	8 (18.18)
Research group (n=48)	0 (0.00)	0 (0.00)	0 (0.00)	1 (2.08)	1 (2.08)
χ2	2.230	2.230	2.230	0.441	6.741
P	0.135	0.135	0.135	0.507	0.009

Note: χ²: chi-square test.