1.

3组患者临床指标对比

Comparison of the clinical indexes among the 3 groups (Mean±SD)

Clinical indicators	3D group	2D group	Open group	F	P
Operation time (min)	119.40±21.22	144.00±30.89	99.13±11.75	16.176	0.000
Blood loss (mL)	40.67±25.20	62.33±27.11	88.67±18.75	15.098	0.000
Postoperative drainage (mL)	129.20±52.76	169.53±65.39	105.6±23.44	6.79	0.005
Postoperative hospital stay (d)	5.87±1.45	6.00±1.13	5.07±0.70	2.934	0.064
Number of lymph node dissection	6.67±4.33	5.33±2.16	5.53±2.61	0.768	0.471
Number of lymph metastasis	1.400±2.02	0.93±1.38	0.73±1.03	0.741	0.483
Expense (yuan)	19 675±1147	18 050±129	12 150±1660	23.661	0.001