What question did this study set out to answer?

The central aim is to understand how subcarinal angle values relate to mortality among COPD patients in the ICU.

April 19, 2026SHILAP Revista de lepidopterología0 citationsOpen Access

Investigation of the relationship between subcarinal angle values and mortality in chronic obstructive pulmonary disease (COPD) patients in the intensive care unit

ATAyşe Şahin Tutak HFHuseyin Avni Findikli EÇErcan Çil

Key Points

The central aim is to understand how subcarinal angle values relate to mortality among COPD patients in the ICU.
Retrospective design involving 108 COPD patients in the ICU from January to December 2018.
SCA values were obtained from posterior-anterior chest X-rays using a Picture Archiving and Communication System.
Patients categorized into survivor and non-survivor groups for analysis.
Narrower SCA values were linked to increased mortality risk (p = 0.025).
Other significant factors include higher creatinine (p = 0.034) and CRP levels (p = 0.01), hypoalbuminemia (p = 0.018), and higher APACHE-II scores (p = 0.001).
Congestive heart failure also showed a significant association with mortality (p = 0.011).

Abstract

Purpose We aimed to investigate the relationship between subcarinal angle (SCA) values and mortality in patients with chronic obstructive pulmonary disease (COPD) patients admitted to the intensive care unit (ICU). Materials and methods This retrospective study included 108 patients with COPD who were admitted to the ICU between January 2018 and December 2018. SCA values on posterior–anterior chest X-rays (PA-CXRs) were recorded from the patients’ Picture Archiving and Communication System (PACS). Patients were divided into survivor and non-survivor groups. Results In this study, congestive heart failure was found to be associated with mortality ( p = 0.011). In addition, higher creatinine levels ( p = 0.034), elevated C-reactive protein (CRP) levels ( p = 0.01), hypoalbuminemia ( p = 0.018), narrower SCA values ( p = 0.025), and higher Acute Physiology and Chronic Health Evaluation II (APACHE-II) scores ( p = 0.001) were associated with mortality. Conclusion Narrower SCA values, advanced age, elevated creatinine and CRP levels, hypoalbuminemia, and higher APACHE-II scores were associated with increased mortality in chronic obstructive pulmonary disease (COPD) patients admitted to the ICU. These findings suggest that SCA measured on routine chest radiographs may serve as a simple and readily available radiographic marker for mortality risk assessment in critically ill COPD patients.

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