PMC:7796152 / 14277-14521 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T132","span":{"begin":12,"end":51},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"ta Analyses\nThe data analyses included four stages. In the first stage, descriptive statistics were employed to calculate the means and standard deviations of the continuous variables and the percentage and frequency of the categorical variable"}