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Diagnostic Accuracy of Chest X-Ray in Covid -19 Patients Taking High-Resolution Computed Tomography as Gold Standard

Authors

Uzma Abdullah
Department of Radiology, Margalla Hospital, Taxila
Nafeesa Tariq
Department of Gynaecology and Obstetrics, Margalla Hospital, Taxila,
Ayesha Rizwan
Department of Dermatology, Margalla Hospital, Taxila
Arooj Zahra
Department of Medicine, Margalla Hospital, Taxila
Humaira Ali
Department of Anatomy, Swat Medical College, Swat
Nain Sukh
Department of Surgery, Margalla Hospital, Taxila
Manahil Tipu
4th Year MBBS Student, Rawalpindi Medical University, Rawalpindi
Amna Shoaib
3rd Year MBBS Student, Al-Nafees Medical College, Islamabad

Keywords

COVID-19, CXR , HRCT

Abstract

Objective:
To determine sensitivity & specificity of chest X-ray in COVID-19, taking High-Resolution Computed Tomography as gold standard.
Study Design:
Cross-sectional study.
Place and Duration of Study:
Radiology Deptt, Margalla Hospital, Taxila and Islamabad Diagnostic Centre, Wah. Two years (February 2020 to February 2022).
Patients and Methods:
The sample comprised 100 COVID-19 patients (Positive Polymerase chain reaction (PCR) test). Their HighResolution Computed Tomography (HRCT) was done which was considered a gold standard for diagnosing COVID-19. Their Chest X-rays (CXR) were performed, and findings of both modalities were compared. Patients having respiratory tract symptoms but PCR negative for COVID-19 were excluded.
Results:
The research had 49 males & 51 females having a median (IQR) age of 46.50(35-55.75) years. The minimum & maximum ages were 6 years and 83 years respectively. Among 100 PCR-positive patients, 29 were found normal on HRCT and 30 on CXR. For moderate cases, the chest X-rays were 72% sensitive & 90.67% specific, with Positive Predictive Value (PPV), Negative Predictive Value (NPV) & diagnostic efficacy of 72%,90.67% & 86% respectively. Similarly, other severity levels were assessed.
Conclusion:
CXR has acceptable diagnostic accuracy for COVID-19 patients, especially with good sensitivity for moderate cases and better specificity for severe cases. A portable chest radiograph might be regarded as an initial alternative imaging modality for patients with COVID-19 signs and symptoms in remote areas.

How to cite this article

Abdullah U, Tariq N, Rizwan A, et al. Diagnostic accuracy of chest x-ray in covid -19 patients taking highresolution computed tomography as gold standard. HMDJ. 2024; 04(01): 04-07.
DOI: https://doi.org/10.69884/hmdj.4.1.8943

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