3-Item Stroke Scale of Singer et al (3I-SS)

Singer et al reported a 3-item scale for screening a patient for stroke. The authors are from J. W. Goethe University in Frankfurt am Main.

Patient selection: possible stroke

Parameters:

(1) level of consciousness

(2) gaze and head deviation

(3) motor function (hemiparesis)

Parameter	Finding	Points
disturbance of consciousness	none	0
	mild to moderate	1
	severe	2
gaze and head deviation	absent	0
	incomplete gaze/head deviation	1
	forced gaze/head deviation	2
hemiparesis	none	0
	mild to moderate	1
	severe	2

total score =

= SUM(points for all 3 parameters)

Interpretation:

• minimum score: 0

• maximum score: 6

• A score >= 4 predicts proximal vessel occlusion (T-segment or M1-segment of the middle cerebral artery).

Performance:

• A score >= 4 has a sensitivity of 67% and specificity of 92% for proximal vessel occlusion.

• The scale is strongly associated with the NIHSS.

To read more or access our algorithms and calculators, please log in or register.