Table 1.

Study population characteristics and data division.

Variable	Total n = 393		P-value
	Training cohort	Testing cohort
No. of patients	274 (70%)	119 (30%)	NA
Age in years, median (IQR)	55 (49–63)	57 (50–66)	0.20
Sex
Male	113 (41.2%)	46 (38.7%)	0.66
Female	161 (58.8%)	73 (61.3%)
Patient category
Out-patient	148 (54.0%)	59 (49.6%)	0.44
In-patient	126 (46.0%)	60 (50.4%)
Imaging scanner
TOSHIBA	57 (20.8%)	28 (23.5%)
SIEMENS	82 (29.9%)	29 (24.4%)	0.62
GE medical systems	112 (40.9%)	49 (41.2%)
Philips	23 (8.4%)	13 (10.9%)
History of hypertension	69/133 (51.9%)	37/65 (56.9%)	0.55
History of smoking	27/132 (20.5%)	17/61 (27.9%)	0.27
History of previous SAH	11/160 (6.9%)	5/70 (7.1%)	1.00
Maximal aneurysm size in mm,	4.3 (3.1–6.2)	4.7 (3.5–6.6)	0.38
median (IQR)
Aneurysm location
ICA	154 (56.2%)	67 (56.3%)
MCA	44 (16.1%)	13 (10.9%)	0.50
Anterior circulation	64 (23.4%)	31 (26.1%)
Posterior circulation	12 (4.4%)	8 (6.7%)
Ruptured aneurysms	106 (38.7%)	46 (38.7%)	1.00
Subsequent surgical treatment	77/194 (39.7%)	35/91 (38.5%)	0.90

Data are number of patients and percentages unless otherwise specified. ICA, internal carotid artery; IQR, interquartile range; MCA, middle cerebral artery; NA, not applicable; SAH, subarachnoid hemorrhage; SD, standard deviation.