Table 2.

Baseline Characteristics

	Included patients (n=1039)	Excluded patients (n=304)	P
Demographics
Age, years (mean, SD)1	66 (15)	73 (12)	<0.001
Male sex (%, n/N)2	59% (618/1039)	52% (154/295)	0.028
Medical History
Diabetic (%, n/N)3	18% (68/372)	24% (6/25)	0.435
Hyperlipidemia (%, n/N)3	23% (86/372)	32% (8/25)	0.333
HTN (%, n/N)4	74% (745/1009)	76% (223/292)	0.403
Baseline Systolic BP (median, IQR)5	174 (45)	177.5 (45.8)	0.208
Baseline Diastolic BP (median, IQR)6	92 (29)	90 (24)	0.074
Medications
Anticoagulant use (%, n)7	10% (97/961)	13% (39/295)	0.134
Antiplatelet use (%, n)8	33% (289/879)	41% (122/294)	0.009
Statin use (%, n)9	25% (91/360)	27% (69/256)	0.642
Baseline Labs
INR (median, IQR)10	1.02 (0.13)	1.00 (0.13)	0.956
INR >1.7 (%, n)10	8% (86)	12% (35)	0.088
Hg (median, IQR)11	140 (23)	137 (23)	0.033
Platelets (median, IQR)12	224 (90)	230 (91)	0.144
Glucose (median, IQR)13	7.1 (2.8)	8.0 (3.4)	<0.001
Creatinine (median, IQR)14	77.8 (27.5)	76.9 (30.9)	0.957
Onset to CTA time, min (median, IQR)15	199 (253)	180 (251)	0.235
Spot positive (%, n)	24% (252)	29% (85)	0.094
Hematoma volume, mL (median, IQR)16	15.5 (208.1)	45.1 (235.6)	<0.001

IQR = interquartile range, HTN = hypertension, INR = international normalized ratio, Hg = hemoglobin

²missing 9 values,

³missing 946 values,

⁴missing 42 values,

⁵missing 169 values,

⁶missing 193 values,

⁷missing 87 values,

⁸missing 170 values,

⁹missing 727 values,

¹⁰missing 195 values,

¹¹missing 521 values,

¹²missing 169 values,

¹³missing 217 values,

¹⁴missing 799 values,

¹⁵missing 190 values,

¹⁶missing 44 values.

Of the 304 excluded patients, 44 were excluded due to missing baseline CT, 3 for missing spot sign data, 120 due to missing time data precluding assignment to a time strata, and 137 due to missing follow-up CT.