Table 2.

Comparison of estimated and actual operative times for surgical procedures.

	SET *	AOT *	Difference between the SET and AOT *	Surgical Procedure Time *	Anesthesia Induction and Recover Time *
N	674	674	674	674	674
Mean	136.59	117.30	19.2834	84.55	32.76
Std. Error of Mean	1.24	1.30	1.66	1.25	0.34
Median	126.00	114.00	17.00	80.50	31.00
Mode	120.00	122.00	8.00	60.00	30.00
Std. Deviation	32.29	33.64	43.17	32.54	8.94
Variance	1042.59	1131.80	1863.78	1058.61	79.95
Range	227.00	228.00	374.00	217.00	78.00
Minimum	73.00	50.00	−151.00	18.00	15.00
Maximum	300.00	278.00	223.00	235.00	93.00
Sum	92,061.00	79,064.00	12,997.00	56,987.00	22,077.00

SET: Surgeon Estimated Time, AOT: Actual Operative Time, * (In minutes).