Association of Lung Ultrasound Score with Mortality and Severity of COVID-19: A Meta-Analysis and Trial Sequential Analysis.

ABSTRACT

OBJECTIVES: The coronavirus disease 2019 (COVID-19) pandemic has rapidly spread all over the world. Lung ultrasound (LUS) has emerged as a useful tool for diagnosing many respiratory diseases. The prognostic role of LUS in COVID-19 patients has not yet been established. METHODS: Several databases were searched on 09 April 2021. The difference in LUS score between the death and survival groups, and the relationship between LUS score and COVID-19 severity were both assessed. RESULTS: The LUS score was significantly higher in the death group compared with the survival group (weighted mean difference (WMD) = 8.21, 95% CI 4.74-11.67, P < 0.001), which was confirmed by trial sequential analysis. Those with mild/moderate, severe and critical COVID-19 had a progressively higher LUS score (critical vs. severe WMD = 8.78, 95% CI 4.17-13.38; P < 0.001; critical vs. mild/moderate/severe WMD = 10.00, 95% CI 6.83-13.17, P < 0.001; severe vs. moderate WMD = 5.96, 95% CI 3.48-8.44, P < 0.001; severe vs. mild/moderate WMD = 7.31, 95% CI 4.45-10.17, P < 0.001). CONCLUSIONS: The LUS score was associated with mortality and severity of COVID-19. The LUS score might be a risk stratification tool for COVID-19 patients.