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PIPAS Severity Score for patients with acute peritonitis (range 0–8)
| Variables | Score |
|---|---|
| Age (years) | |
| 80 or more | 1 |
| Less than 80 | 0 |
| Malignancy | |
| Yes | 1 |
| No | 0 |
| Severe cardiovascular disease | |
| Yes | 1 |
| No | 0 |
| Severe chronic kidney disease | |
| Yes | 1 |
| No | 0 |
| Respiratory rate ≥ 22 breaths/min | |
| Yes | 1 |
| No | 0 |
| Systolic blood pressure < 100 mmHg | |
| Yes | 1 |
| No | 0 |
| Blood oxygen saturation level (SpO2) < 90% in air | |
| Yes | 1 |
| No | 0 |
| AVPU responsiveness scale full alert | |
| No | 1 |
| Yes | 0 |
