CFS score subtotal—the severity of clinical features: (nil: 0, mild: 1–6 points, moderate: 7–12 points, severe: ≥13 points)

DLT score subtotal—the presence of observed features likely to PSH (score subtotal one point for per feature present)

PSH-AM score- the diagnostic likelihood of PSH (unlikely: <8 points, possible: 8–16 points, probable: ≥17 points)

PSH-AM score = CFS score + DLT score