Table VI.

Multivariable linear regression results for log-length of stay

Variable	β (95% CI)	P
General anesthesia vs		<.0001
Spinal	0.095 (0.046–0.144)	.0001
Epidural	0.035 (−0.019 to 0.090)	.2046
Monitored anesthesia care/local	0.182 (0.132–0.232)	<.0001
Age, years	0.003 (0.002–0.005)	<.0001
Female	0.101 (0.067–0.136)	<.0001
Nonwhite	0.075 (0.040–0.111)	<.0001
Current smoker	0.008 (−0.023 to 0.037)	.6608
Total work relative value units	0.000 (−0.001 to 0.001)	.7934
Access (percutaneous vs femoral)	0.030 (0.000 0.060)	.0495
ASA class (4–5 vs 1–3)	0.100 (0.068–0.133)	<.0001
Estimated glomerular filtration rate	−0.002 (−0.002 to −0.001)	<.0001
Functionally dependent (partial/total vs independent)	0.285 (0.223–0.347)	<.0001
Body mass index	−0.001 (−0.004 to 0.001)	.2725
History of
Congestive heart failure	0.294 (0.187–0.402)	<.0001
Diabetes	0.040 (0.005–0.076)	.0259
Congestive obstructive pulmonary disease	0.072 (0.040–0.105)	<.0001
Angina	0.121 (0.037–0.205)	.0048
Cerebrovascular accident	0.037 (−0.005 to 0.079)	.0867
Units transfused	0.085 (0.071–0.099)	<.0001
Operative time, min	0.002 (0.0017–0.0021)	<.0001

ASA, American Society of Anesthesiologists; CI, confidence interval.