curb65_pneumonia_severity: CURB-65 Score for Pneumonia Severity

In cliot: Clinical Indices and Outcomes Tools

CURB-65 Score for Pneumonia Severity

Description

Calculates the CURB-65 score to estimate mortality risk in patients with community-acquired pneumonia. The score assesses Confusion, Urea (BUN), Respiratory rate, Blood pressure, and age >= 65.

Usage

curb65_pneumonia_severity(confusion, bun, respiratory_rate, systolic_bp,
                          diastolic_bp, age, bun_units = "mg/dL")

Arguments

confusion	Numeric (0 or 1). Presence of confusion (1 = Yes).
bun	Numeric. Blood Urea Nitrogen level. (> 19 mg/dL or > 7 mmol/L adds 1 point).
respiratory_rate	Numeric. Respiratory rate in breaths per minute. (>= 30 adds 1 point).
systolic_bp	Numeric. Systolic blood pressure. (< 90 mmHg contributes to BP criterion).
diastolic_bp	Numeric. Diastolic blood pressure. (<= 60 mmHg contributes to BP criterion). Note: The BP point is added if SBP < 90 OR DBP <= 60.
age	Numeric. Patient age in years. (>= 65 adds 1 point).
bun_units	String. Units for BUN. "mg/dL" (default) or "mmol/L".

Value

A list containing:

CURB65_Score	The calculated score (Range 0-5).
Risk_Group	Risk classification (Low, Moderate, High).
Est_30_Day_Mortality	Estimated 30-day mortality percentage.
Recommendation	Clinical guidance regarding disposition (Home vs. Hospital vs. ICU).

References

Lim WS, van der Eerden MM, Laing R, et al. Defining community acquired pneumonia severity on presentation to hospital: an international derivation and validation study. Thorax. 2003;58(5):377-382. doi:10.1136/thorax.58.5.377

Examples

# Example 1: High Risk
# 70yo (+1), Confused (+1), BUN 25 (+1), SBP 85 (+1), RR 20
# Score = 4
curb65_pneumonia_severity(1, 25, 20, 85, 60, 70)

# Example 2: Low Risk
# 50yo, Alert, BUN 10, RR 18, BP 120/80
# Score = 0
curb65_pneumonia_severity(0, 10, 18, 120, 80, 50)

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