PMC:7095437 / 11185-11357 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T72","span":{"begin":0,"end":172},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Continuous variables were expressed as means ± standard deviations or median (interquartile range (IQR)), and categorical variables were presented as numbers (percentages)."}