• Amjad Kanj, Bilal Samhouri, Nadine Abdallah, Omar Chehab, and Misbah Baqir.
• Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN.
• Mayo Clin. Proc. 2021 Feb 1; 96 (2): 400-407.

ObjectiveTo assess host factors in pneumocystis jirovecii pneumonia (PCP)-related hospitalizations and compare outcomes between HIV and non-HIV patients.MethodsUsing the National Inpatient Sample database, we identified 3384 hospitalizations with PCP (International Classification of Diseases, Ninth Revision, Clinical Modification code: 136.3) as the primary discharge diagnosis from 2005 to 2014. We evaluated hospitalizations for the following host factors: HIV, malignancies, organ transplantation, rheumatologic diseases, and vasculitides. We compared the prevalence of individual host factors among PCP hospitalizations over time, and compared intervention rates and outcomes between HIV and non-HIV patients with PCP.ResultsAmong all hospitalizations for PCP, malignancy was the most prevalent host factor (46.0%, n=1559), followed by HIV (17.8%, n=604); 60.7% (n=946) of malignancies were hematologic. The prevalence of HIV among hospitalizations for PCP decreased from 25.1% in 2005 to 9.2% in 2014 (P<.001), whereas the prevalence of non-HIV immunocompromising conditions increased. Compared with HIV patients, PCP patients without HIV had higher rates of bronchoscopy (52.3% vs 26.7%, P<.001) and endotracheal intubation (17.0% vs 7.9%, P<.001), prolonged hospitalizations (11.5 vs 8.7 days, P<.001), higher hospitalization costs (86.8 vs 48.2×103 USD, P<.001) and increased in-hospital mortality (16.0% vs 5.0%, P<.001). After adjusting for age, sex, and smoking status, there was no difference in mortality between non-HIV and HIV patients with PCP (adjusted odds ratio, 1.4; 95% CI, 0.9 to 2.3).ConclusionThe epidemiology of PCP has shifted with an increase in the prevalence of non-HIV patients who have higher intubation rates and prolonged hospitalizations compared with matched HIV patients.Copyright © 2020 Mayo Foundation for Medical Education and Research. Published by Elsevier Inc. All rights reserved.

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