Table 1

Patient demographics, operative time, length of hospital stay, and probability of morbidity and mortality for the dehydrated and not dehydrated groups.

Patient Demographic	Dehydration (Blood Urea Nitrogen/Creatinine >20)				P
	Not Dehydrated		Dehydrated
	Mean	SD	Mean	SD
Age, y	54.65	11.40	59.52	11.22	<0.001
Body mass index	30.66	6.42	30.53	6.79	0.272
Estimated probability of morbidity	2.26%	1.22%	2.60%	1.56%	<0.001
Estimated probability of mortality	0.18%	0.83%	0.30%	1.07%	<0.001
Length of total hospital stay, d	1.83	3.07	2.39	4.21	<0.001
Total operation time, min	130.02	71.23	135.34	75.71	<0.001
	N	%	N	%
Sex
Women	4824	45.0%	2573	61.2%	<0.001
Men	5901	55.0%	1633	38.8%
Race
Not Black	9125	85.1%	3910	93.0%	<0.001
Black	1601	14.9%	296	7.0%
Ethnicity
Not Hispanic	10,062	93.8%	3924	93.3%	<0.001
Hispanic	664	6.2%	282	6.7%