Table 4:

Multivariable binomial regression examining effect of preoperative to 24-hour postoperative CPAR change on postoperative hospital length of stay

Effect	Incidence Rate Ratio (95% CI)	P- value
Pre- to 24-hour postoperative CPAR Change	1.18 (1.11, 1.26)	<0.001
Baseline cognition (per SD decrease)	1.21 (1.06, 1.38)	0.005
Age (per 5 years)	1.09 (0.97, 1.22)	0.167
Surgery Type
General/Abdominal/Plastic/ENT v Urologic/Gynecologic	1.32 (0.95, 1.83)	0.103
Orthopedic v Urologic/Gynecologic	0.86 (0.59, 1.24)	0.422
Thoracic v Urologic/Gynecologic	2.48 (1.67, 3.68)	<0.001

CPAR, cerebrospinal fluid-to-plasma albumin ratio