Table 1.
Scale | Rating System | Sensitivity/Specificity | Considerations/Cut-Off Value |
---|---|---|---|
3-Item Stroke Scale (3I-SS) | Level of consciousness (0–2) Gaze and head deviation (0–2) Hemiparesis (0–2) |
67%/92% | Large vessel occlusion stroke recognition ≥4 |
Austrian Prehospital Stroke Scale (APSS) | Facial weakness (0–1) Arm weakness (0–2) Speech (0–2) Leg weakness (0–2) Gaze deviation (0 or 2) |
64%/86% | Large vessel occlusion stroke recognition ≥4 |
Cincinnati Prehospital Stroke Scale (CPSS) | Gaze (2) Arm weakness (1) Level of consciousness (1) |
89%/73% | Severe stroke recognition N/A |
Field Assessment Stroke Triage for Emergency Destination (FAST-ED) | Facial weakness (0–1) Arm weakness (0–2) Speech changes (0–2) Eye deviation (0–2) Anosognosia/neglect (0–2) |
61%/89% | Large vessel occlusion stroke recognition >4 |
Los Angeles Prehospital Stroke Screen (LAPSS) |
|
91%/97% | “In-the-field” stroke diagnosis N/A |
Rapid Arterial Occlusion Evaluation (RACE) | Aphasia/agnosia (0–2) Facial weakness (0–2) Arm or leg weakness (0–2) Leg weakness (0–2) Gaze–eye deviation (0–1) |
85%/68% | Large vessel occlusion stroke recognition ≥5 |
Shortened NIHSS for EMS (sNIHSS-EMS) | Level of consciousness (0–3) Facial weakness (0–3) Left motor arm (0–4) Right motor arm (0–4) Left motor leg (0–4) Right motor leg (0–4) Sensory (0–2) Best language (0–3) Dysarthria (0–2) |
70%/81% | Large vessel occlusion stroke recognition ≥6 |