Table 3.

Time of surgery and anesthesia

	Surgical time				t test	Anesthesia time				t test
	Median	Mean	CI 95%	Range	p	Median	Mean	CI 95%	Range	p
SI	375	371	312–429	153–495	0.086	463.5	447	391–503	234–575	0.059
XI	300	312	273–351	197–420		380	384	343–424	288–480
P1	390	400	212–587	330–480		514	489	267–712	390–564
P2	409	394	327–462	241–495		462.5	460	412–509	354–563
P3	290	313	196–430	253–420		335	362.5	235–490	300–480
P1–2	398	396	345–447	241–495	0.083	470	468	425–511	354–564	0.020
P3	290	313	196–430	253–420		335	362	235–490	300–480
2 SP	405	409	326–491	351–474		497	499	414–583	438–563
3 SP	315	338	266–410	241–480		372	400	325–475	300–564
4 SP	430	424	240–608	347–495		470	468	437–499	455–480

Abbreviations: SI Da Vinci SI system, XI Da Vinci XI system, P1–2–3 periods 1–2–3, SP surgical procedures