piro_cap_score: PIRO Score for Community-Acquired Pneumonia (CAP)

In cliot: Clinical Indices and Outcomes Tools

PIRO Score for Community-Acquired Pneumonia (CAP)

Description

Calculates the PIRO score (Predisposition, Insult, Response, Organ dysfunction) to stratify the severity and mortality risk in patients admitted to the ICU with Community-Acquired Pneumonia.

Usage

piro_cap_score(age, copd, immunocompromised, multilobar_opacities, bacteremia,
               shock, severe_hypoxemia, acute_renal_failure)

Arguments

age	Numeric. Patient age in years. (> 70 years adds 1 point).
copd	Numeric (0 or 1). History of Chronic Obstructive Pulmonary Disease. (1 = Yes, +1 point).
immunocompromised	Numeric (0 or 1). Immunocompromised state (e.g., corticosteroids, HIV, chemotherapy, transplant). (1 = Yes, +1 point).
multilobar_opacities	Numeric (0 or 1). Presence of multilobar opacities on chest radiograph. (1 = Yes, +1 point).
bacteremia	Numeric (0 or 1). Presence of bacteremia (positive blood cultures). (1 = Yes, +1 point).
shock	Numeric (0 or 1). Systolic BP < 90 mmHg or requirement for vasopressors. (1 = Yes, +1 point).
severe_hypoxemia	Numeric (0 or 1). PaO2/FiO2 ratio < 150 mmHg. (1 = Yes, +1 point).
acute_renal_failure	Numeric (0 or 1). Serum Creatinine > 1.2 mg/dL (> 106 µmol/L) or BUN > 20 mg/dL (> 7.14 mmol/L). (1 = Yes, +1 point).

Value

A list containing:

PIRO_Score	The calculated score (Range 0-8).
Risk_Category	Risk stratification (Low, Mild/Intermediate, High, Very High).
Mortality_Risk_28_Day	Estimated 28-day mortality probability.

References

Rello J, Rodriguez A, Lisboa T, et al. PIRO score for community-acquired pneumonia: a new prediction rule for assessment of severity in intensive care unit patients with community-acquired pneumonia. Crit Care Med. 2009;37(2):456-462. doi:10.1097/CCM.0b013e3181958ca0

Examples

# Example 1: Low Risk
# Age 60, No comorbidities, Multilobar (1), No shock, Normal labs
# Score = 1
piro_cap_score(60, 0, 0, 1, 0, 0, 0, 0)

# Example 2: High Risk
# Age 75 (1), COPD (1), Shock (1), Renal Failure (1)
# Score = 4
piro_cap_score(75, 1, 0, 0, 0, 1, 0, 1)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.