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Table 3 PEWS scale

From: Establishment and utility assessment of posterior reversible encephalopathy syndrome early warning scoring (PEWS) scale establishment and utility assessment of PEWS scale

risk factor (maximum:10 points) clinical features (maximum:10 points) EEG features (maximum:6 points)
Underlying disease (maximum: 3 points) Hematologic malignancies 3 High cranial pressure (maximum: 1 points) Headache 1 Slow wave (maximum: 3 points) Focal θ activity 1
Autoimmune disease 2 Nausea, vomiting 1 Focal δ activity 2
Other diseases 1 Visual symptoms (maximum: 3 points) Blindness or blurred vision 2 Focal δ and θ activity 2
Hypertension (maximum: 3 points) Level1(< 159/ 99) 1 Cortical blindness 3 Diffused θ activity 2
Level2 (< 179/109) 2 Seizure (maximum: 3 points) Generalized seizures 3 Diffused δ and θ activity 3
Level3 (> 180/110) 3 Partial seizures 2 Diffused δ activity 3
Infection (maximum: 2 points) Mild infection 1 Automatism 1 Epileptiform discharges (maximum: 3 points) Focal discharge 2
Septicemia 2 Disturbance of consciousness (maximum: 3 points) Confusion 2
Drug toxicity (maximum: 2 points) Cytotoxic drugs 2 Coma 3 widespread discharge 3