Risk Factors for Secondary Organizing Pneumonia and Acute Fibrinous and Organizing Pneumonia in Patients with COVID-19 Pneumonia
Abstract
Purpose Secondary organizing pneumonia (OP) and acute fibrinous and organizing pneumonia (AFOP) are frequently observed in cases of COVID-19 pneumonia. Nevertheless, the identification of risk factors related to OP/AFOP and their impact on patient outcomes remain inadequately elucidated. Patients and Methods This retrospective study aimed to identify risk factors associated with OP/AFOP in patients with COVID-19 pneumonia and to compare clinical outcomes between patients with and without OP/AFOP. The study included hospitalized patients with COVID-19 pneumonia admitted between July 1 and September 30, 2021. Factors associated with OP/AFOP were identified using multivariable regression analysis. Additionally, a multivariable Cox proportional hazard model was used to evaluate the association of OP/AFOP with 90-day mortality. Results Among the 666 hospitalized patients with COVID-19 pneumonia, 53 (8%) developed OP/AFOP during their admission. When compared to patients younger than 50 years old, those aged 50–70 and over 70 years old exhibited an increased risk of developing OP/AFOP, with adjusted odds ratios (aOR) of 3.87 (95% CI, 1.24–12.11; P=0.02) and 5.74 (95% CI, 1.80–18.27; P=0.003), respectively. Other factors associated with OP/AFOP included a history of diabetes mellitus (aOR 2.37; 95% CI, 1.27–4.44; P=0.01) and patients with oxygen saturation at admission below 88% (aOR 4.52; 95% CI, 1.22–16.67; P=0.02). Furthermore, the presence of OP/AFOP was correlated with an…
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