Abstract

The study aimed to evaluate CT severity index and its correlation with oxygen saturation (SPO₂) value.
Methodology: In this retrospective study, a total of 200 COVID-19 RTPCR positive patients were enrolled as per inclusion-exclusion criteria. Along with demographical data, SPO₂ levels recorded on the day of the HRCT examination were taken from case records and correlated with CT severity index scoring.
 
Results: The mean age of patients was 41.42±16.13 years, with a male dominancy (67.50%). The mean SPO₂ level was 91.71±9.62. The mean CT severity index was 8.060±7.09. The majority of the patients had a mild CT severity index [97(48.50%)], followed by Moderate [82(41.00%)] and Severe [21(10.50%)].Most patients were observed under 20-34, followed by 50-64 years. Among all the patients, those with mild, moderate and severe CT severity index, 69.07%, 63.41% and 76.19%, respectively, were males. The mean value of SPO₂ was found to significantly decrease as severity increased. A non-significantly positive and negative correlation was noted in age and gender, respectively. Alternatively, a significantly negative correlation was observed between CT severity index and SPO₂
Conclusion: According to results of present study, CT severity index can be used to estimate Covid-19 progression and consequently, disease management based on SPO₂ level