scap_pneumonia_score: Severe Community-Acquired Pneumonia (SCAP) Score

In cliot: Clinical Indices and Outcomes Tools

Severe Community-Acquired Pneumonia (SCAP) Score

Description

Calculates the SCAP score to predict in-hospital mortality and the risk of severe adverse events (SAE) such as ICU admission or need for mechanical ventilation in patients with Community-Acquired Pneumonia. The score ranges from 0 to 59, stratifying patients into four risk classes.

Usage

scap_pneumonia_score(arterial_ph, systolic_bp, respiratory_rate, pao2, fio2,
                     bun, altered_mental_status, age, multilobar_involvement,
                     bun_units = "mg/dL")

Arguments

arterial_ph	Numeric. Arterial pH level. (< 7.30 adds 13 points).
systolic_bp	Numeric. Systolic blood pressure in mmHg. (< 90 mmHg adds 11 points).
respiratory_rate	Numeric. Respiratory rate in breaths per minute. (> 30/min adds 9 points).
pao2	Numeric. Partial pressure of oxygen in arterial blood (mmHg).
fio2	Numeric. Fraction of inspired oxygen (e.g., 0.21 for room air, or 21). Used to calculate P/F ratio. (P/F < 250 adds 6 points).
bun	Numeric. Blood Urea Nitrogen level. (> 30 mg/dL or > 10.7 mmol/L adds 5 points).
altered_mental_status	Numeric (0 or 1). Presence of altered mental status (confusion, disorientation). (1 = Yes, +5 points).
age	Numeric. Patient age in years. (>= 80 years adds 5 points).
multilobar_involvement	Numeric (0 or 1). Presence of multilobar infiltrates on chest X-ray. (1 = Yes, +5 points).
bun_units	String. Units for BUN input. Options: "mg/dL" (default) or "mmol/L".

Value

A list containing:

SCAP_Score	The calculated SCAP score.
Risk_Class	Risk classification (Low, Moderate, High, Very High).
Severe_Adverse_Event_Risk	Estimated risk of SAE (ICU admission, Mechanical Ventilation, or Death).
In_Hospital_Mortality_Risk	Estimated risk of in-hospital mortality.

References

Espana PP, Capelastegui A, Gorordo I, et al. Development and validation of a clinical prediction rule for severe community-acquired pneumonia. Am J Respir Crit Care Med. 2006;174(11):1249-1256. doi:10.1164/rccm.200602-177OC

Examples

# Example 1: High Risk
# pH 7.25 (+13), SBP 85 (+11), RR 35 (+9), P/F 200 (+6), BUN 40 (+5)
# Score = 13 + 11 + 9 + 6 + 5 = 44
scap_pneumonia_score(7.25, 85, 35, 60, 0.3, 40, 0, 70, 0)

# Example 2: Low Risk
# pH 7.4, SBP 120, RR 20, P/F 300, BUN 15, Alert, Age 50, Unilobar
# Score = 0
scap_pneumonia_score(7.4, 120, 20, 90, 0.21, 15, 0, 50, 0)

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