Table 1

Ordinal scale used in this study based on the British Society of Thoracic Imaging (BSTI) reporting template10

Ordinal scale for studyBSTI gradeFeatures on X-ray
0CVCX3-Non-COVID-19Alternative pathology such as CVCX3—Non-COVID-19 pneumothorax with no features of COVID-19 identified
1CVCX0—NormalNo pathology seen
2CVCX2—Indeterminate for COVD-19 or atypical featuresPoor quality film or central/basal consolidation
3CVCX1—Classic findings of COVID-19Peripheral ground glass opacities