PMC:7796148 / 12313-12437 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T104","span":{"begin":0,"end":124},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The mean age of the total sample was 49.94 years (median = 51, SD = 16.14, range = 18–87), and 51.15% were female (n = 531)."}