Table VI.

Comparison of the incidence rates of complications/adverse reactions among the four groups.

Group	Hemorrhage/hemoptysis	Hemothorax	Pneumothorax	Lung infection	Tracheal injury/spasm	Hyoxemia	Arrhythmia/heart failure	Total n (%)
Group A (n=276)	1	0	0	0	0	0	0	1 (0.36)
Group B (n=204)	0	0	0	0	1	0	0	1 (0.49)
Group C (n=187)	1	0	0	0	0	0	0	1 (0.53)
Group D (n=234)	0	0	2	0	0	0	0	2 (0.85)
χ2	2.046		5.741		3.618			0.583
P-value	0.563		0.126		0.306			0.900