Data entry

Patient variables

All variables are arranged vertically inside each section to make bedside completion faster and clearer.

Demographics

Age and sex define the base score.

Age Years. Adult patients only. Sex Female sex subtracts 10 age points. Nursing home resident +10 points Present

Co-morbidities

Select chronic conditions present before the pneumonia episode.

Neoplastic disease+30 points Present Liver disease+20 points Present Congestive heart failure+10 points Present Cerebrovascular disease+10 points Present Renal disease+10 points Present

Examination findings

Use the current presentation values.

Altered mental status+20 points Present Respiratory rate≥30 breaths/min adds +20 Systolic blood pressure<90 mmHg adds +20 Temperature<35°C or ≥40°C adds +15 Pulse≥125 beats/min adds +10

Laboratory and radiographic findings

Use available laboratory values and chest imaging.

Arterial pH<7.35 adds +30 BUN / urea≥30 mg/dL BUN or ≥11 mmol/L urea adds +20 Sodium<130 mmol/L adds +20 Glucose≥250 mg/dL or ≥14 mmol/L adds +10 Hematocrit<30% adds +10 OxygenationPaO₂ <60 mmHg / <8 kPa or SpO₂ <90% adds +10 Pleural effusion on chest x-ray+10 points Present

Result

— points

Class —

Enter age to calculate PSI.

The result will appear automatically.

Point breakdown

No positive criteria yet.

Risk classes

Class	Score	Typical site of care
I	low-risk rule / ≤50	Outpatient if appropriate
II	≤70	Outpatient if appropriate
III	71–90	Outpatient vs. observation
IV	91–130	Inpatient admission
V	>130	Inpatient admission

Clinical reminder

PSI is most useful for identifying low-risk CAP patients. Always consider hypoxemia, sepsis, respiratory failure, multilobar disease, immunosuppression, social factors, oral intake, pregnancy, and local admission pathways.

Pneumology