. 2019 Oct 30;8(21):e013412. doi: 10.1161/JAHA.119.013412

Table 2.

Multivariable Logistic Regression Model Evaluating Predictors of 30‐Day Adverse Events in the Derivation Population

Variable	Definition	OR	95% CI	P Value
Age, y	18–70	Reference	···	···
	71–80	0.99	0.79–1.25	0.95
	>80	1.34	1.03–1.75	0.03^a
Race or ethnicity	White	Reference	···	···
	Black	0.71	0.42–1.20	0.21
	Hispanic	0.70	0.37–1.36	0.30
	Asian	1.41	0.89–2.50	0.23
	Unknown	0.80	0.49–1.31	0.38
Diabetes mellitus	None	Reference	···	···
	Noninsulin	1.41	1.10–1.81	0.007^a
	Insulin	1.55	1.15–2.08	0.004^a
Body habitus	Normal weight	Reference	···	···
	Overweight	0.95	0.75–1.22	0.70
	Class I obesity	0.91	0.68–1.22	0.53
	Class II/III obesity	0.70	0.48–1.03	0.07
	Missing	0.76	0.29–2.00	0.59
Preoperative GFR, mL/min per 1.73 m²	≥40	Reference	···	···
	<40	1.36	1.02–1.82	0.04^a
	Missing	0.49	0.21–1.15	0.10
Preoperative white blood cell count, cells/μL	4000–12 000	Reference	···	···
	>12 000	0.72	0.41–1.26	0.25
	<4000	0.33	0.10–1.16	0.06
	Missing	1.54	0.67–3.53	0.31
Preoperative hematocrit, %	>36	Reference	···	···
	≤36	1.22	0.97–1.53	0.09
	Missing	1.15	0.42–3.19	0.79
Symptomatic status	Asymptomatic	Reference	···	···
	Amaurosis fugax	0.96	0.61–1.50	0.84
	TIA	1.37	1.04–1.80	0.02^a
	Stroke	2.38	1.55–3.67	<0.001^a
	Missing	1.00	0.46–2.19	0.99
Preoperative modified Rankin Scale score	0–1	Reference	···	···
	2–5	2.16	1.33–3.50	0.002^a
	Not recorded or presentation other than stroke	2.57	1.45–4.54	0.001^a
High‐risk physiological characteristics	…	1.93	1.38–2.69	<0.001^a
High‐risk physiological characteristics	Missing	2.01	0.82–4.93	0.13
High‐risk anatomical characteristics		1.35	1.02–1.78	0.03^a
High‐risk anatomical characteristics	Missing	0.88	0.34–2.29	0.79
Preoperative β blocker		1.05	0.85–1.29	0.65
Preoperative β blocker	Missing	0.40	0.09–1.69	0.21
Contralateral carotid artery stenosis	Mild (<50%)	Reference	···	···
	Moderate (50%–79%)	1.22	0.96–1.54	0.10
	Severe (80%–99%) or occlusion	1.38	1.01–1.90	0.04^a
	Not obtained	1.41	1.04–1.92	0.03^a
Admission type	Transfer	1.54	1.12–2.11	0.008^a
Emergent operation	…	1.70	1.06–2.71	0.03^a
ASA class	I–II	Reference	···	···
	III	1.13	0.71–1.81	0.60
	IV–V	1.94	1.18–3.18	0.009^a
Concordance statistic	…	0.69
Hosmer‐Lemeshow test	…	0.15

ASA indicates American Society of Anesthesiologists; GFR, glomerular filtration rate; OR, odds ratio; TIA, transient ischemic attack.

Statistically significant difference.