PMC:7347402 / 15187-15313 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T170","span":{"begin":65,"end":69},"obj":"http://purl.obolibrary.org/obo/UBERON_0000473"},{"id":"T171","span":{"begin":98,"end":102},"obj":"http://purl.obolibrary.org/obo/UBERON_0000473"},{"id":"T172","span":{"begin":121,"end":125},"obj":"http://purl.obolibrary.org/obo/UBERON_0000473"}],"text":"Proportions for categorical variables were compared using the χ2 test, Cochran–Mantel–Haenszel χ2 test or Fisher’s exact test."}

{"project":"LitCovid-sentences","denotations":[{"id":"T132","span":{"begin":0,"end":126},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Proportions for categorical variables were compared using the χ2 test, Cochran–Mantel–Haenszel χ2 test or Fisher’s exact test."}