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 1

Items of the NIHSS selected to form the Cog-4 cognitive scale with range 0–9.

	Cog-4	Score
(1b)	Level of consciousness- questions [month and age]
	Answers both correctly	0
	Answers one question correctly	1
	Answers neither questions correctly	2
(1c)	Level of consciousness commands (open and close eyes; grip and release hand)
	Performs both tasks correctly	0
	Performs one task correctly	1
	Performs neither task correctly	2
(9)	Best language
	No aphasia	0
	Mild to moderate aphasia	1
	Severe aphasia	2
	Mute and global aphasia	3
(11)	Extinction and inattention
	No inattention	0
	Mild inattention	1
	Severe inattention	2