cliot (version 1.0.0)

rosier_stroke_scale: Recognition of Stroke in the Emergency Room (ROSIER) Scale

Description

Calculates the ROSIER score to help emergency department staff differentiate between acute stroke and stroke mimics. The score assigns points for specific neurological deficits and subtracts points for loss of consciousness or seizure activity, which are more common in mimics.

Usage

rosier_stroke_scale(loss_of_consciousness, seizure_activity,
                    asymmetric_facial_weakness, asymmetric_arm_weakness,
                    asymmetric_leg_weakness, speech_disturbance,
                    visual_field_defect)

Value

A list containing:

ROSIER_Score

The calculated total score (Range -2 to +5).

Likelihood

Interpretation (Stroke Likely > 0, Unlikely <= 0).

Test_Characteristics

Sensitivity and Specificity for the >0 cutoff.

Arguments

loss_of_consciousness

Numeric (0 or 1). Has there been loss of consciousness or syncope? (1 = Yes, -1 point).

seizure_activity

Numeric (0 or 1). Has there been seizure activity? (1 = Yes, -1 point).

asymmetric_facial_weakness

Numeric (0 or 1). Is there new acute asymmetric facial weakness? (1 = Yes, +1 point).

asymmetric_arm_weakness

Numeric (0 or 1). Is there new acute asymmetric arm weakness? (1 = Yes, +1 point).

asymmetric_leg_weakness

Numeric (0 or 1). Is there new acute asymmetric leg weakness? (1 = Yes, +1 point).

speech_disturbance

Numeric (0 or 1). Is there speech disturbance? (1 = Yes, +1 point).

visual_field_defect

Numeric (0 or 1). Is there a visual field defect? (1 = Yes, +1 point).

References

Nor AM, Davis J, Sen B, et al. The Recognition of Stroke in the Emergency Room (ROSIER) scale: development and validation of a stroke recognition instrument. Lancet Neurol. 2005;4(11):727-734. doi:10.1016/S1474-4422(05)70201-5

Examples

# Example 1: Stroke Likely
# Face weakness (+1), Arm weakness (+1), Speech disturbance (+1)
# Score = 3
rosier_stroke_scale(0, 0, 1, 1, 0, 1, 0)

# Example 2: Stroke Unlikely (Mimic)
# Seizure (-1), LOC (-1), Arm weakness (+1)
# Score = -1
rosier_stroke_scale(1, 1, 0, 1, 0, 0, 0)