Table 2. Results.

Variable	One-stage group	Two-stage group	P value
Mean operative time (min ± SD)	38±5.0	39±8.0*	0.85
Mean hospital stay (days ± SD)	1.136±0.6	2.42±0.47**	0.01
Residual pain in 1 week (n/%)	16/12	15/11	0.31
Pneumothorax (n/%)	8/6	11/8	0.15
Compensatory sweating (n/%)	25/19	6/4	0.0001
Horner’s syndrome (n/%)	0/0	0/0	–
Chylothorax (n/%)	0/0	0/0	–
Recurrence (n/%)	0/0	0/0	–

SD, standard deviation. *, considering the sum of two-stage operative time; **, considering the total two-stage hospitalization.