Step 1 | |
Age >50 years | |
Congestive heart failure | |
Neoplastic disease, cerebrovascular disease, renal disease, and liver disease | |
Confusion | |
Pulse ≥125 beats/minute | |
Respiratory rate ≥30 breaths/minute | |
Systolic blood pressure <90 mmHg | |
Oral temperature <35°C or ≥40°C | |
None of these characteristics present = > PSI score category 0 | |
Otherwise proceed to step 2 | |
Step 2 | |
Characteristic | Points |
Age for men | age (years) |
Age for women | age (years) – 10 |
Nursing home resident | + 10 |
Neoplastic disease | + 30 |
Liver disease | + 20 |
Congestive heart failure | + 10 |
Cerebrovascular disease | + 10 |
Renal disease | + 10 |
Altered mental status | + 20 |
Respiratory rate ≥30 breaths/minute | + 20 |
Systolic blood pressure <90 mmHg | + 20 |
Temperature <35°C or ≥40°C | + 15 |
Pulse ≥125 beats/minute | + 10 |
Arterial pH <7.35 | + 30 |
Blood urea nitrogen ≥11 mmol/l | + 20 |
Sodium <130 mmol/l | + 20 |
Glucose ≥14 mmol/l | + 10 |
Haematocrit <30% | + 10 |
Partial pressure of arterial oxygen <60 mmHg | + 10 |
Or oxygen saturation <90% on pulse oximetry pleural effusion | + 10 |
PSI score category | |
0 Class I — very low mortality | |
≤70 Class II — low mortality | |
71–90 Class III — intermediate mortality | |
91–13 0 Class IV — high mortality | |
>130 Class V — very high mortality | |