Prognostic value of pneumococcal urinary antigen test in community-acquired pneumonia

The pneumococcal urinary antigen test (UAT) has been known to improve sensitivity and specificity for the diagnosis of pneumococcal pneumonia. Associations of UAT results with prognosis in community acquired pneumonia (CAP) are not known. We hypothesized that positive UAT is associated with a good p...

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Veröffentlicht in:PloS one 2018-07, Vol.13 (7), p.e0200620-e0200620
Hauptverfasser: Kim, Byunghyun, Kim, Joonghee, Jo, You Hwan, Lee, Jae Hyuk, Hwang, Ji Eun, Park, Min Ji, Lee, Sihyung
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Kim, Joonghee
Jo, You Hwan
Lee, Jae Hyuk
Hwang, Ji Eun
Park, Min Ji
Lee, Sihyung
description The pneumococcal urinary antigen test (UAT) has been known to improve sensitivity and specificity for the diagnosis of pneumococcal pneumonia. Associations of UAT results with prognosis in community acquired pneumonia (CAP) are not known. We hypothesized that positive UAT is associated with a good prognosis, and incorporation of UAT into CRB65 would improve its prognostic performance. In this registry-based retrospective study, we analyzed CAP patients over a 10-year period beginning in April 2008. Patients who had UAT results were included in multivariable extended Cox-regression analyses to determine the association between UAT positivity and 30-day mortality. UAT results were incorporated for patients with a CRB65 score of 1 by subtracting 1 from the scoring system if the test was positive. The performance of the modified scoring systems was assessed with area under the receiver operating characteristic (AUROC) curves. Among 5145 CAP patients, total 2280 patients had UAT results and were included in analyses. A positive UAT result was associated with a good prognosis after a week of hospitalization (aHR, 0.14; p = 0.007). After modification of CRB65 using UAT results, positive and negative predictive values for 30-day mortality were increased from 7.7 to 8.3 (p
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Associations of UAT results with prognosis in community acquired pneumonia (CAP) are not known. We hypothesized that positive UAT is associated with a good prognosis, and incorporation of UAT into CRB65 would improve its prognostic performance. In this registry-based retrospective study, we analyzed CAP patients over a 10-year period beginning in April 2008. Patients who had UAT results were included in multivariable extended Cox-regression analyses to determine the association between UAT positivity and 30-day mortality. UAT results were incorporated for patients with a CRB65 score of 1 by subtracting 1 from the scoring system if the test was positive. The performance of the modified scoring systems was assessed with area under the receiver operating characteristic (AUROC) curves. Among 5145 CAP patients, total 2280 patients had UAT results and were included in analyses. A positive UAT result was associated with a good prognosis after a week of hospitalization (aHR, 0.14; p = 0.007). After modification of CRB65 using UAT results, positive and negative predictive values for 30-day mortality were increased from 7.7 to 8.3 (p&lt;0.001) and 98.9 to 99.1 (p = 0.010). The AUROC increased from 0.73 to 0.75 (p&lt;0.001). Positive results on UAT could be considered as a good prognostic factor in CAP. 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Kim, Joonghee ; Jo, You Hwan ; Lee, Jae Hyuk ; Hwang, Ji Eun ; Park, Min Ji ; Lee, Sihyung</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c692t-4a222c479b48c76323d3110dc6a9a81550dade21a16133109270586e2a2165343</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Aged</topic><topic>Aged, 80 and over</topic><topic>Analysis</topic><topic>Antibiotics</topic><topic>Antigens</topic><topic>Antigens, Bacterial - urine</topic><topic>Biology and Life Sciences</topic><topic>Communities</topic><topic>Community-Acquired Infections - diagnosis</topic><topic>Community-Acquired Infections - microbiology</topic><topic>Community-Acquired Infections - mortality</topic><topic>Community-Acquired Infections - urine</topic><topic>Diagnosis</topic><topic>Emergency medical care</topic><topic>Female</topic><topic>Gram-negative bacteria</topic><topic>Health aspects</topic><topic>Hospitals</topic><topic>Humans</topic><topic>Infectious diseases</topic><topic>Male</topic><topic>Medical prognosis</topic><topic>Medicine</topic><topic>Medicine and Health Sciences</topic><topic>Middle Aged</topic><topic>Mortality</topic><topic>Patients</topic><topic>Pneumococcal pneumonia</topic><topic>Pneumonia</topic><topic>Pneumonia, Pneumococcal - diagnosis</topic><topic>Pneumonia, Pneumococcal - microbiology</topic><topic>Pneumonia, Pneumococcal - mortality</topic><topic>Pneumonia, Pneumococcal - urine</topic><topic>Predictive Value of Tests</topic><topic>Prognosis</topic><topic>Prospective Studies</topic><topic>Regression analysis</topic><topic>Republic of Korea - epidemiology</topic><topic>Retrospective Studies</topic><topic>ROC Curve</topic><topic>Streptococcus infections</topic><topic>Streptococcus pneumoniae - immunology</topic><topic>Streptococcus pneumoniae - isolation &amp; 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Associations of UAT results with prognosis in community acquired pneumonia (CAP) are not known. We hypothesized that positive UAT is associated with a good prognosis, and incorporation of UAT into CRB65 would improve its prognostic performance. In this registry-based retrospective study, we analyzed CAP patients over a 10-year period beginning in April 2008. Patients who had UAT results were included in multivariable extended Cox-regression analyses to determine the association between UAT positivity and 30-day mortality. UAT results were incorporated for patients with a CRB65 score of 1 by subtracting 1 from the scoring system if the test was positive. The performance of the modified scoring systems was assessed with area under the receiver operating characteristic (AUROC) curves. Among 5145 CAP patients, total 2280 patients had UAT results and were included in analyses. A positive UAT result was associated with a good prognosis after a week of hospitalization (aHR, 0.14; p = 0.007). After modification of CRB65 using UAT results, positive and negative predictive values for 30-day mortality were increased from 7.7 to 8.3 (p&lt;0.001) and 98.9 to 99.1 (p = 0.010). The AUROC increased from 0.73 to 0.75 (p&lt;0.001). Positive results on UAT could be considered as a good prognostic factor in CAP. UAT could be used as a useful tool in deciding whether to refer patients to the hospital, especially in moderate CAP with a CRB score of 1.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>30028834</pmid><doi>10.1371/journal.pone.0200620</doi><orcidid>https://orcid.org/0000-0001-5080-7097</orcidid><oa>free_for_read</oa></addata></record>
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subjects Aged
Aged, 80 and over
Analysis
Antibiotics
Antigens
Antigens, Bacterial - urine
Biology and Life Sciences
Communities
Community-Acquired Infections - diagnosis
Community-Acquired Infections - microbiology
Community-Acquired Infections - mortality
Community-Acquired Infections - urine
Diagnosis
Emergency medical care
Female
Gram-negative bacteria
Health aspects
Hospitals
Humans
Infectious diseases
Male
Medical prognosis
Medicine
Medicine and Health Sciences
Middle Aged
Mortality
Patients
Pneumococcal pneumonia
Pneumonia
Pneumonia, Pneumococcal - diagnosis
Pneumonia, Pneumococcal - microbiology
Pneumonia, Pneumococcal - mortality
Pneumonia, Pneumococcal - urine
Predictive Value of Tests
Prognosis
Prospective Studies
Regression analysis
Republic of Korea - epidemiology
Retrospective Studies
ROC Curve
Streptococcus infections
Streptococcus pneumoniae - immunology
Streptococcus pneumoniae - isolation & purification
Studies
Survival Rate
Urinalysis
Urine
Variables
Ventilators
title Prognostic value of pneumococcal urinary antigen test in community-acquired pneumonia
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