Table 1.

Demographic characteristics of the 381 included patients

Demographics	n (%)
Age at diagnosis (years), median (Q1–Q3)	34.7 (24.3–48.6)
Age at SRS (years), median (Q1–Q3)	37.5 (25.8–51.9)
Sex
Male	170 (44.6%)
Female	211 (55.4%)
Genetic mutation identified	2 (0.6%)
Initial presentation
Incidental*	6 (1.6%)
Seizure*	9 (2.4%)
Haemorrhage	360 (94.5%)
Focal neurological deficit*	6 (1.6%)
Clinical symptoms pre-SRS†
None	29 (7.6%)
Motor deficit	86 (22.6%)
Sensory deficit	62 (16.3%)
Cerebellar symptom	26 (6.8%)
Cranial nerve deficit	98 (25.7%)
Seizure	77 (20.2%)
Headaches	72 (18.9%)
Others‡	56 (14.7%)
Pre-SRS seizure control (n=77)
No seizure without medication	2 (2.6%)
No seizure with medication	34 (44.2%)
Improvement of at least 50% in frequency or intensity under medication	14 (18.2%)
Improvement of less than 50% under medication	27 (35.1%)

*Not associated with acute or subacute haemorrhage; patients were included due to haemorrhagic events occurring in the time interval between diagnosis and radiosurgery.

†Patients may exhibit several symptoms pre-SRS. The percentages are calculated for each symptom per patient.

‡Speech disorder, memory loss, unspecified gait trouble.

Q1–Q3, first to third quartiles; SRS, stereotactic radiosurgery.