Table 4.

Comparative analysis of VATS operation indexes

	Intracavity group(n = 78)	Extracavity group(n = 69)	Statistic	p value
Time of VATS	103.4 ± 21.0	112.2 ± 17.3	t = 2.761	0.007*
The rate of conversion to thoracotomy	0(0%)	4(5.8%)	χ2 = 4.648	0.046**
One-time resection rate of nodules	100%	100%	–	–
Excised lung tissue volume (cm 3)	127.05 ± 58.24	141.26 ± 53.11	t = 1.538	0.126

^**Fisher’s exact probability method was adopted, P value is less than 0.05, showing statistical difference; ^*P value is less than 0.05, showing statistical difference