Supplementary Table 2.

Multivariable logistic regression predicting delirium in 3 431 632 patients underwent one of 10 major surgical oncology procedures, Nationwide Inpatient Sample, 2003–2013

Predictors of delirium	OR	CI 2.50%	CI 97.50%	p
Cystectomy	9.25	7.73	11.07	<0.0001
Pancreatectomy	7.03	5.73	8.62	<0.0001
Lung resection	6.85	5.79	8.10	<0.0001
Gastrectomy	6.33	5.17	7.74	<0.0001
Colectomy	6.06	5.14	7.14	<0.0001
Nephrectomy	5.64	4.76	6.67	<0.0001
Oophorectomy	4.98	3.90	6.37	<0.0001
Hysterectomy	3.50	2.89	4.23	<0.0001
Mastectomy	1.15	0.91	1.45	0.2
Length of stay	1.04	1.04	1.05	<0.0001
Teaching hospital (ref. non-teaching)	1.01	0.95	1.08	0.7
Annual MSOP hospital volume low (ref. high)	1.00	0.93	1.08	0.9
Medium	1.03	0.96	1.11	0.4
Hospital size small (ref. large)	0.97	0.89	1.07	0.5
Medium	0.96	0.89	1.02	0.2
2009–2013 (ref. 2003–2008)	1.43	1.35	1.52	<0.0001
Age 55–64 (Ref. <55)	1.90	1.67	2.16	<0.0001
Age ≥65	3.80	3.32	4.35	<0.0001
Male (Ref. female)	1.38	1.30	1.46	<0.0001
African American (Ref. Caucasian)	0.82	0.73	0.91	0.0002
Non-Caucasian	0.88	0.82	0.94	0.0001
Charlson 1 (Ref. Charlson 0)	1.07	1.01	1.13	0.03
Charlson ≥2	1.20	1.12	1.29	<0.0001
Medicaid (Ref. private ins)	1.21	1.03	1.42	0.02
Medicare	1.58	1.44	1.73	<0.0001
Other	0.97	0.81	1.15	0.7
Midwest (Ref. South)	1.27	1.18	1.36	<0.0001
Northeast	1.03	0.95	1.11	0.5
West	1.11	1.03	1.21	0.008
Dementia	24.07	18.77	30.88	<0.0001
Alcohol induced mental disorder	0.90	0.65	1.25	0.5
Mood disorder	2.43	2.02	2.93	<0.0001
Non-organic disorder	1.23	0.90	1.68	0.2
Anxiety disorder	1.53	1.39	1.69	<0.0001
Alcohol dependence	14.51	12.68	16.62	<0.0001
Schizophrenia disorder	0.92	0.61	1.37	0.7
Drug dependence syndrome	1.70	1.09	2.67	0.02
Non-dependent drug use	1.11	1.02	1.20	0.01
Drug-induced disorder	4.81	3.65	6.33	<0.0001

CI: confidence interval; MSOP: major surgical oncology procedures; OR: odds ratio.