Table 2.

Comparison Between Upward and Downward Deflection

		X2		XC
		Mean	SD	Mean	SD	Interaction P value
Empty	Up	279.83	0.29	296.83	0.29
	Down	273.50	0.87	292.67	0.29	0.0056
Laser 200 μm	Up	269.33	0.29	289.17	0.29
	Down	264.33	0.58	286.17	0.29	0.0019
Laser 273 μm	Up	245.83	0.29	256.83	0.29
	Down	240.33	0.29	250.17	0.29	0.0081
Delta Wire Grasper (3.2F)	Up	176.33	0.29	188.83	0.29
	Down	170.83	0.29	186.00	0.50	0.0002
1.7F Nitinol Stone Extractor	Up	272.67	0.29	295.17	0.29
	Down	268.00	0.00	290.33	0.29	0.5796
2.2F Nitinol Stone Extractor	Up	252.33	0.29	272.50	0.50
	Down	245.17	0.29	268.00	0.50	0.0005

SD=standard deviation.