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Table 1 The Physiologic Severity Score (PSS) used for data collection

From: Ketamine for prehospital trauma analgesia in a low-resource rural trauma system: a retrospective comparative study of ketamine and opioid analgesia in a ten-year cohort in Iraq

  0 points 1 point 2 points 3 points 4 points
Respiratory rate No breathing <10 > 35 25–35 10–24
Systolic blood pressure No pulse < 50 50–69 70–90 > 90
Consciousness No response Only to pain To sound Confused Normal
  1. The rated value (0–4 points) for respiratory rate, systolic blood pressure, and consciousness were combined to create the PSS sum score (0–12 points)