Table 3 . Number of study-eligible fatal strokes recorded in ONS, CPRD, and HES data sources

	ONS	CPRD	HES
Stroke subtype (ICD-10 code)	Patients, n	Proportion of total, %	Patients, n	Proportion of total, %	Patients, n	Proportion of total, %
All strokes (I60–I64)	17 977	100	5849	100	11 236	100
Ischaemic strokes (I63)	2248	12.5	822	14.1	5032	44.8
All haemorrhagic strokes (I60–l62)	4289	23.9	1434	24.5	3785	33.7
SAH (I60)	1123	6.2	387	6.6	810	7.2
Other haemorrhagic^a (I61–I62)	3166	17.6	1047	17.9	2975	26.5
Stroke, not otherwise specified (I64)	11 440	63.6	3593	61.4	2419	21.5

^aIncludes intracerebral haemorrhagic stroke and haemorrhagic strokes not otherwise specified. CPRD = Clinical Practice Research Datalink. HES = Hospital Episode Statistics. ICD-10 = International Classification of Diseases, version 10. ONS = Office for National Statistics. SAH = subarachnoid haemorrhage.