Role of laparoscopy in rectal cancer: A review

Table 3 Operative time for laparoscopic and open rectal resection data presented as mean ± SD, min

Ref.	Laparoscopy	Open	P value
Liang et al[17]	138 ± 24	119 ± 22	< 0.001
Kang et al[18]	245 ± 75	197 ± 63	< 0.001
Lujan et al[20]	194 ± 45	173 ± 59	0.02
Ng et al[21]	213 ± 59	154 ± 70	< 0.001
Ng et al[22]	214 ± 46	164 ± 43	< 0.001
Braga et al[24]	262 ± 72	209 ± 70	< 0.001
Zhou et al[30]	120	106	0.05

SD: Standard deviation.