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Scored minor criteria for severe community-acquired pneumonia predicted better
Qi Guo1,2, Wei-Dong Song3, Hai-Yan Li4
1Department of Respiratory Medicine, Shenzhen Hospital, Peking University, Lianhua road No. 1120, Shenzhen, 518036, Guangdong, China. qiguo007@sina.com.
Background:
Infectious Disease Society of America/American Thoracic Society (IDSA/ATS) minor criteria for severe community-acquired pneumonia (CAP) are of unequal weight in predicting mortality, but the major problem associated with IDSA/ATS minor criteria might be a lack of consideration of weight in prediction in clinical practice. Would awarding different points to the presences of the minor criteria improve the accuracy of the scoring system? It is warranted to explore this intriguing hypothesis.
Methods:
A total of 1230 CAP patients were recruited to a retrospective cohort study. This was tested against a prospective two-center cohort of 1749 adults with CAP. 2 points were assigned for the presence of PaO2/FiO2 ≤ 250 mmHg, confusion, or uremia on admission and 1 point for each of the others.
Results:
The mortality rates, and sequential organ failure assessment (SOFA) and pneumonia severity index (PSI) scores increased significantly with the numbers of IDSA/ATS minor criteria present and minor criteria scores. The correlations of the minor criteria scores with the mortality rates were higher than those of the numbers of IDSA/ATS minor criteria present. As were the correlations of the minor criteria scores with SOFA and PSI scores, compared with the numbers of IDSA/ATS minor criteria present. The pattern of sensitivity, specificity, positive predictive value, and Youden's index of scored minor criteria of ≥2 scores or the presence of 2 or more IDSA/ATS minor criteria for prediction of mortality was the best in the retrospective cohort, and the former was better than the latter. The validation cohort confirmed a similar pattern. The area under the receiver operating characteristic curve of scored minor criteria was higher than that of IDSA/ATS minor criteria in the retrospective cohort, implying higher accuracy of scored version for predicting mortality. The validation cohort confirmed a similar paradigm.
Conclusions:
Scored minor criteria orchestrated improvements in predicting mortality and severity in patients with CAP, and scored minor criteria of ≥2 scores or the presence of 2 or more IDSA/ATS minor criteria might be more valuable cut-off value for severe CAP, which might have implications for more accurate clinical triage decisions.
Insights
Assigning weighted scores to Infectious Disease Society of America/American Thoracic Society minor criteria significantly improves prediction of severe community-acquired pneumonia (CAP) mortality. This novel scoring system enhances accuracy for clinical triage decisions in CAP patients.
Area of Science:
- Pulmonology
- Infectious Diseases
- Critical Care Medicine
Background:
- The Infectious Disease Society of America/American Thoracic Society (IDSA/ATS) established minor criteria for severe community-acquired pneumonia (CAP).
- These criteria are of unequal weight in predicting mortality, and clinical practice often overlooks their differential importance.
- A hypothesis emerged to explore if assigning distinct point values to these minor criteria could enhance prediction accuracy.
Purpose of the Study:
- To investigate whether a weighted scoring system for IDSA/ATS minor criteria improves the prediction of mortality and severity in patients with CAP.
- To compare the predictive accuracy of a scored minor criteria system against the traditional counting of criteria presence.
Main Methods:
- A retrospective cohort study of 1230 CAP patients was conducted.
- A prospective two-center cohort of 1749 adult CAP patients was used for validation.
- A scoring system was developed: 2 points for PaO2/FiO2 ≤ 250 mmHg, confusion, or uremia; 1 point for other criteria.
Main Results:
- Mortality rates, SOFA, and PSI scores significantly increased with higher numbers and scores of IDSA/ATS minor criteria.
- The correlations between scored minor criteria and mortality, SOFA, and PSI scores were higher than those of the simple count of criteria.
- The scored minor criteria demonstrated superior sensitivity, specificity, and Youden's index for predicting mortality, with a higher area under the ROC curve compared to the unweighted criteria.
Conclusions:
- A weighted scoring system for IDSA/ATS minor criteria significantly enhances the prediction of mortality and severity in CAP patients.
- A threshold of ≥2 scored minor criteria appears to be a valuable cut-off for identifying severe CAP.
- This improved predictive accuracy has implications for more precise clinical triage and management decisions in severe CAP.
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