HIGHLIGHTS
SUMMARY
A retrospective, multicenter, propensity-matched, casecontrol study was designed based on a data registry comprising 186 hospitals from a national health care system in the United_States (HCA Healthcare, Nashville, TN). The included patient population was stratified into the first wave ("Early 2020" patient cohort; March 1- June 30, 2020) and the second wave ("Late 2020" patient cohort; July 1-December 31, 2020). The unequal timewindows of 4 months ("Early 2020") vs. 6 months ("Late 2020") were pragmatically selected to reflect on the approximate timing of the first two main surges of the COVID-19 . . .
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