Frontiers in Cellular and Infection Microbiology (Mar 2022)

A Clinically Applicable Nomogram for Predicting the Risk of Invasive Mechanical Ventilation in Pneumocystis jirovecii Pneumonia

  • Rongjun Wan,
  • Rongjun Wan,
  • Rongjun Wan,
  • Rongjun Wan,
  • Rongjun Wan,
  • Lu Bai,
  • Lu Bai,
  • Lu Bai,
  • Lu Bai,
  • Lu Bai,
  • Yusheng Yan,
  • Jianmin Li,
  • Qingkai Luo,
  • Hua Huang,
  • Lingmei Huang,
  • Zhi Xiang,
  • Qing Luo,
  • Zi Gu,
  • Qing Guo,
  • Pinhua Pan,
  • Pinhua Pan,
  • Pinhua Pan,
  • Pinhua Pan,
  • Pinhua Pan,
  • Rongli Lu,
  • Rongli Lu,
  • Rongli Lu,
  • Rongli Lu,
  • Rongli Lu,
  • Yimin Fang,
  • Yimin Fang,
  • Yimin Fang,
  • Yimin Fang,
  • Yimin Fang,
  • Chengping Hu,
  • Chengping Hu,
  • Chengping Hu,
  • Chengping Hu,
  • Chengping Hu,
  • Juan Jiang,
  • Juan Jiang,
  • Juan Jiang,
  • Juan Jiang,
  • Juan Jiang,
  • Yuanyuan Li,
  • Yuanyuan Li,
  • Yuanyuan Li,
  • Yuanyuan Li,
  • Yuanyuan Li

DOI
https://doi.org/10.3389/fcimb.2022.850741
Journal volume & issue
Vol. 12

Abstract

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ObjectivePneumocystis jirovecii pneumonia (PCP) is a life-threatening disease associated with a high mortality rate among immunocompromised patient populations. Invasive mechanical ventilation (IMV) is a crucial component of treatment for PCP patients with progressive hypoxemia. This study explored the risk factors for IMV and established a model for early predicting the risk of IMV among patients with PCP.MethodsA multicenter, observational cohort study was conducted in 10 hospitals in China. Patients diagnosed with PCP were included, and their baseline clinical characteristics were collected. A Boruta analysis was performed to identify potentially important clinical features associated with the use of IMV during hospitalization. Selected variables were further analyzed using univariate and multivariable logistic regression. A logistic regression model was established based on independent risk factors for IMV and visualized using a nomogram.ResultsIn total, 103 patients comprised the training cohort for model development, and 45 comprised the validation cohort to confirm the model’s performance. No significant differences were observed in baseline clinical characteristics between the training and validation cohorts. Boruta analysis identified eight clinical features associated with IMV, three of which were further confirmed to be independent risk factors for IMV, including age (odds ratio [OR] 2.615 [95% confidence interval (CI) 1.110–6.159]; p = 0.028), oxygenation index (OR 0.217 [95% CI 0.078–0.604]; p = 0.003), and serum lactate dehydrogenase level (OR 1.864 [95% CI 1.040–3.341]; p = 0.037). Incorporating these three variables, the nomogram achieved good concordance indices of 0.829 (95% CI 0.752–0.906) and 0.818 (95% CI 0.686–0.950) in predicting IMV in the training and validation cohorts, respectively, and had well-fitted calibration curves.ConclusionsThe nomogram demonstrated accurate prediction of IMV in patients with PCP. Clinical application of this model enables early identification of patients with PCP who require IMV, which, in turn, may lead to rational therapeutic choices and improved clinical outcomes.

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