Table 3.

Postoperative pain level depending on the difficulty index.

	Difficulty Index
	I	II	III	p
Postoperative pain (VAS)
Early period (POD < #3)	1.77 ± 1.27	1.92 ± 1.60	2.14 ± 1.95	0.584
Late period (POD #3–7)	0.81 ± 1.39	0.61 ± 1.13	0.59 ± 1.02	0.694
Total period	2.67 ± 3.01	2.45 ± 2.78	2.44 ± 2.33	0.942

VAS, visual analog scale; POD, postoperative day.