Comparison of three predictive rules for assessing severity in elderly patients with CAP

Area of Science:

• Geriatric Medicine
• Infectious Diseases
• Pulmonology

Background:

• Community-acquired pneumonia (CAP) poses a significant mortality risk in elderly populations.
• Accurate severity assessment is crucial for timely and appropriate management of CAP in older adults.
• Existing scoring systems like PSI, CURB-65, and CRB-65 aim to stratify CAP severity and predict outcomes.

Purpose of the Study:

• To compare the predictive accuracy of Pneumonia Severity Index (PSI), CURB-65, and CRB-65 rules for short-term mortality in elderly patients with CAP.
• To evaluate the performance of these scoring systems in a real-world, population-based cohort.

Main Methods:

• A population-based study included individuals over 65 with radiographically confirmed CAP in Tarragona, Spain (2002-2008).
• PSI, CURB-65, and CRB-65 scores were calculated at diagnosis.
• Thirty-day mortality was the primary outcome, with sensitivity, specificity, and AUC used for comparison.

Main Results:

• The overall CAP mortality rate was 13.6%, higher in hospitalized (15.3%) versus outpatient (1.4%) cases.
• Mortality significantly increased with higher scores across all three systems (PSI, CURB-65, CRB-65).
• The predictive performance for 30-day mortality was similar across the three rules, with AUCs ranging from 0.672 to 0.727.

Conclusions:

• The PSI, CURB-65, and CRB-65 demonstrate comparable efficacy in predicting short-term mortality in elderly CAP patients.
• The simplified CRB-65 score is a viable and recommended tool for assessing CAP severity in elderly individuals in primary care or emergency settings.