PMC:7441788 / 25373-25580 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T208","span":{"begin":128,"end":129},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"It is worth noting that in the study’s propensity score model, four possible important prognostic variables were unbalanced and a center effect was not considered, which all can cause bias for study results."}

    LitCovid-sample-sentences

    {"project":"LitCovid-sample-sentences","denotations":[{"id":"T184","span":{"begin":0,"end":207},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"It is worth noting that in the study’s propensity score model, four possible important prognostic variables were unbalanced and a center effect was not considered, which all can cause bias for study results."}

    LitCovid-sentences

    {"project":"LitCovid-sentences","denotations":[{"id":"T184","span":{"begin":0,"end":207},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"It is worth noting that in the study’s propensity score model, four possible important prognostic variables were unbalanced and a center effect was not considered, which all can cause bias for study results."}