A random forest imputation algorithm was used to deal with missing variables.16 For datasets with a mixture of categorical and continuous variables, random forest imputation enables imputation with less bias than other imputation methods, such as multiple imputations.16 We used all survey variables not missing more than 30% of values in each variable for the imputation
In a preparation known as singado or singa , N
Peng, Clinical Characteristics of 138 Hospitalized Patients With 2019 Novel CoronavirusInfected Pneumonia in Wuhan, China, Journal of the American Medical Association, 2020
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Hookah This is a centuries-old way of smoking that uses a large glass pipe, often shared by multiple users in a hookah lounge or social gathering