Table 2.

Odds ratios (OR) for logistic regression analysis predicting postoperative delirium.

	Unadjusted OR (95%CI)	p value	Adjusted OR (95%CI)	p value
Age	1.028 (1.013 – 1.043)	0.0002	1.03 (1.007 – 1.045)	0.006
BMI; kg.m−2	1.002 (0.985 – 1.020)	0.83	0.984 (0.962 – 1.005)	0.13
Sex; male	0.922 (0.716 – 1.187)	0.54	0.794 (0.581 – 1.085)	0.15
Black / other minority	1.587 (1.082 – 2.329)	0.02	1.912 1.267 – 2.884)	0.002
Obstructive sleep apnoea risk
Intermediate vs. low	1.191 (0.811 – 1.749)	0.38	0.85 (0.543 – 1.329)	0.48
High vs. low	1.77 (1.220 – 2.567)	0.003	1.336 (0.798 – 2.234)	0.27
ASA physical status
3 vs. 1 / 2	1.279 (0.858 – 1.907)	0.23	0.873 (0.565 – 1.349)	0.56
4 vs. 1 / 2	3.056 (2.055 – 4.544)	< 0.0001	1.586 (0.985 – 2.552)	0.06
Functional capacity < 4 METs	2.238 (1.723 – 2.908)	< 0.0001	1.673 (1.23 – 2.279)	0.001
High procedural cardiac risk	1.939 (1.503 – 2.501)	< 0.0001	1.002 (0.700 – 1.433)	0.99
Charlson Comorbidity Index	1.001 (0.939 – 1.067)	0.98	1.014 (0.939 – 1.098)	0.74
Tiredness	1.399 (1.085 – 1.803)	0.009	1.13 (0.841 – 1.518)	0.42
Moderate / severe alcohol use	0.755 (0.331 – 1.720)	0.51	0.832 (0.357 – 1.94)	0.67
Diabetes mellitus	1.312 (0.996 – 1.728)	0.05	0.973 (0.703 – 1.347)	0.94
History of stroke	1.783 (1.276 – 2.490)	0.0007	1.297 (0.90 – 1.866)	0.15
Chronic obstructive pulmonary disease / asthma	1.457 (1.091 – 1.946)	0.01	1.26 (0.9 – 1.718)	0.15
Chronic pain	1.177 (0.898 – 1.543)	0.24	1.08 (0.788 – 1.48)	0.60
Depression / anxiety disorder	1.243 (0.912 – 1.694)	0.17	1.156 (0.824 – 1.621)	0.40
Hearing / visual impairment	0.962 (0.747 – 1.239)	0.78	1.006 (0.752 – 1.346)	0.97
Intra-operative ketamine	1.715 (0.983 – 2.995)	0.06	1.296 (0.72 – 2.335)	0.39
Intra-operative midazolam	0.762 (0.592 – 0.981)	0.04	1.124 (0.841 – 1.503)	0.43
Peri-operative opioid dose	1.008 (1.005 – 1.011)	< 0.0001	1.006 (1.003 – 1.009)	< 0.0001
MAC-Hours	1.001 (0.993 – 1.010)	0.83	1.003 (0.993 – 1.013)	0.61