Clinical characteristics on admission predict in-hospital fatal outcome in patients aged ≥75 years with novel coronavirus disease (COVID-19): a retrospective cohort study.

All demographic, clinical, and laboratory data that exhibited significant or borderline significant differences both in continuous and categorical data comparison between the two groups were first tested in the univariate model. and then entered into the multivariate model if they achieved statistical significance ( P < 0.1) in the univariate analysis.

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