TABLE 1.

Baseline Demographics and Clinical Characteristics

Characteristic	Category	N (%)
Age	Mean (SD)	56.3 (13.7)
	<40	29 (12.3)
	40–49	47 (19.9)
	50–59	55 (23.3)
	60–69	61 (25.8)
	70–79	38 (16.1)
	≥80	6 (2.5)
Sex	Male	62 (26.3)
	Female	174 (73.7)
Ethnicity	White British	220 (93.2)
	White—“Others”	6 (2.5)
	White—“European”	2 (0.8)
	Indian	2 (0.8)
	Chinese	2 (0.8)
	Asian—other “Cantonese”	1 (0.4)
	Arabic	1 (0.4)
	White—other “South American”	1 (0.4)
	Unknown	1 (0.4)
Pregnancy/HRT	No	233 (98.7)
	Yes	3 (1.3)
Incidental	Yes	32 (13.6)
	No	204 (86.4)
Symptoms	Headache	65
	Seizures	41
	CN deficit(s)	77
	CN 2	62
	Other CN deficit	19
	Limb weakness	30
	Limb sensory disturbance	12
	Altered GCS	12
	Cognitive deficit	22
	Ataxia	17
WHO Performance status (preoperative)	Median (IQR)	0 (0–1)
	0–1	190 (80.5)
	2–4	46 (19.5)
ACCI (preoperative)	Median (IQR)	2 (1–3)
	0–2	160 (66.4)
	3–5	62 (26.4)
	>5	17 (7.2)

ACCI, age-adjusted Charlson Comorbidity Index; CN, cranial nerve; GCS, Glasgow Coma Scale; HRT, hormone replacement therapy.