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Pneumonia is an independent risk factor for pyogenic liver abscess: A population-based, nested, case-control study

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  • Sai-Wai Ho
  • Chao-Bin Yeh
  • Shun-Fa Yang
  • Han-Wei Yeh
  • Jing-Yang Huang
  • Ying-Hock Teng

Abstract

Background: Bacteremic pneumonia is considered a potential cause of distal organ abscess formation. Therefore, we hypothesize that pneumonia is a risk factor for pyogenic liver abscess (PLA).The aim of this study is to explore the association between pneumonia and PLA. Methodology/Principal findings: A nationwide, population-based, nested, case–control study was conducted using data from the Taiwan National Health Insurance Research Database. In total, 494 patients with PLA and 1,976 propensity score matched controls were enrolled. Conditional logistic regression was used to estimate adjusted odds ratios (aORs) in patients with exposure to pneumonia before PLA. After matched and adjusted for confounding factors including age, sex, urbanization, income, chronic liver disease, alcohol-related disease, biliary stone, chronic kidney disease, diabetes mellitus, chronic liver disease, and cancer, hospitalization for pneumonia remained an independent risk factor for PLA with an aORs of 2.104 [95% confidence interval (CI) = 1.309–3.379, p = 0.0021]. Moreover, the aORs were significantly higher among patients hospitalized for pneumonia within 30 days (aORs = 10.73, 95% CI = 3.381–34.054), 30–90 days (aORs = 4.698, 95% CI = 1.541–14.327) and 90–180 (aORs = 4.000, 95% CI = 1.158–13.817) days before PLA diagnosis. Conclusion: Pneumonia is an independent risk factor for subsequent PLA. Moreover, hospitalization for pneumonia within 180 days before PLA diagnosis was associated with an increased risk of PLA.

Suggested Citation

  • Sai-Wai Ho & Chao-Bin Yeh & Shun-Fa Yang & Han-Wei Yeh & Jing-Yang Huang & Ying-Hock Teng, 2017. "Pneumonia is an independent risk factor for pyogenic liver abscess: A population-based, nested, case-control study," PLOS ONE, Public Library of Science, vol. 12(6), pages 1-12, June.
    • Handle: RePEc:plo:pone00:0178571
    DOI: 10.1371/journal.pone.0178571
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