. Author manuscript; available in PMC: 2020 Oct 1.

Published in final edited form as: J Neurosurg Anesthesiol. 2019 Oct;31(4):385–391. doi: 10.1097/ANA.0000000000000566

Table 3.

Predictors of postoperative delirium by multivariable analysis

	Postoperative Delirium

	OR (95% CI)	P-value
Age	1.04 (1.00, 1.09)	0.048
ASA physical status ≥ 3	1.89 (1.04, 3.59)	0.042
METs < 4	1.84 (1.10, 3.07)	0.019
Depression	2.01 (1.21, 3.32)	0.006
Non-elective surgery	4.81 (1.75, 12.79)	0.002
Invasiveness Tier 3 or 4	1.97 (1.10, 3.69)	0.028
BIS Monitoring	2.09 (1.22, 3.70)	0.009
Mean pain score postoperative day 1	1.28 (1.11, 1.48)	< 0.001

OR: Odds ratio, CI: Confidence interval, ASA: American Society of Anesthesiologists physical status, METs: Metabolic equivalents of task, BIS: Bispectral Index