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Data Analysis
This protocol is extracted from research article:
Mortality Rate of Patients With COVID-19 Based on Underlying Health Conditions
Disaster Med Public Health Prep, May 3, 2021; DOI: 10.1017/dmp.2021.139

Conditional probability was calculated to ascertain the mortality rate for each factor. The chi-squared test was used to determine whether the presence or absence of an underlying disease had a significant effect on the mortality rate. Continuous variables are presented as mean (standard deviation). Welch’s t-test or Student’s t-test was used to describe the difference in time intervals depending on the presence or absence of the underlying health condition.18 In multivariate logistic regression analysis, the odds ratio (OR) was estimated for the mortality rate based on sex, age, and the underlying disease. All statistical analyses were performed using R (version 4.0.2) software, and values of P < 0.05 were considered statistically significant.

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