The Cog-4 Subset of the National Institutes of Health Stroke Scale as a Measure of Cognition: Relationship with Baseline Factors and Functional Outcome after Stroke Using Data from the Virtual International Stroke Trials Archive

Table 2

Baseline characteristics; mean (SD) or number (%).

Variables
Total number of participants	9,147
Age (years)	69.2 (12.5)
Sex, male (%)	4957 (54.2)
Risk factors (%)
Atrial fibrillation	24.7
Diabetes	22.0
Hypertension	68.5
Previous MI	14.0
Previous stroke/TIA	28.3
Left hemispheric strokes (%)	49.0
NIHSS score (/42)	13.1 (5.8)
Cog-4	1 [0–6]
Stroke type (%)
Ischaemic stroke	90.8
Primary intracerebral haemorrhage	9.2
Stroke syndrome (𝑛=1703) (%)
Total anterior circulation	42.3
Partial anterior circulation	40.6
Lacunar	13.5
Posterior circulation	3.6