Table 1.

Univariate analysis of factors associated with having a stroke mimic.

Variable type	Variable	N	Mimic rate	p-value	Unadjusted OR (95% CI)	Age-adjusted OR (95% CI)
Demographics	Age
	≥72	3999	25.3%
	<72	4188	34.4%	<0.0001	1.55 (1.41–1.71)
	Sex
	Men	3700	26.0%
	Women	4487	33.3%	<0.0001	1.42 (1.29–1.57)	1.51 (1.36–1.66)
	Race
	Caucasian	4583	29.0%
	African American	3129	31.9%	0.007	1.15 (1.04–1.27)	0.95 (0.85–1.05)
Acuity of symptoms	Code status
	Not stroke code	3066	27.1%
	Stroke code	2663	32.6%	0.0001	1.30 (1.16–1.46)	1.28 (1.14–1.53)
	Mode of arrival (ED only)
	Ambulance	3707	27.8%
	Automobile	2414	35.8%	<0.0001	1.45 (1.30–1.62)	1.30 (1.16–1.45)
Location when stroke team called	Location
	ED	6108	31.0%
	Inpatient	1263	34.0%	0.03	1.15 (1.01–1.30)	1.25 (1.10–1.42)
Past medical history	h/o hypertension
	Yes	4620	11.4%
	No	2367	42.9%	<0.0001	5.83 (5.16–6.57)	5.68 (5.01–6.43)
	h/o diabetes mellitus
	Yes	1727	12.6%
	No	5260	25.2%	<0.0001	2.33 (1.99–2.72)	2.35 (2.01–2.74)
	h/o hyperlipidemia
	Yes	2664	11.1%
	No	4323	28.8%	<0.0001	3.22 (2.81–3.70)	3.07 (2.67–3.53)
	h/o coronary artery disease
	Yes	1536	11.7%
	No	5451	25.0%	<0.0001	2.53 (2.14–2.99)	2.36 (1.99–2.79)
	h/o atrial fibrillation
	Yes	1081	9.2%
	No	5906	24.4%	<0.001	3.21 (2.59–3.98)	2.86 (2.30–3.56)
	h/o carotid artery disease
	Yes	296	11.1%
	No	6691	22.6%	<0.001	2.32 (1.61–3.35)	2.10 (1.45–3.03)
	h/o intracranial hemorrhage
	Yes	137	10.9%
	No	6150	14.7%	0.214	1.41 (0.82–2.42)	1.41 (0.82–2.41)
	h/o ischemic stroke
	Yes	1573	15.8%
	No	5392	23.7%	<0.0001	1.66 (1.43–1.93)	1.58 (1.36–1.84)