PMC:7796176 / 8067-8388 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T63","span":{"begin":0,"end":321},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"We used multiple linear regressions with a residualized change score approach [13,14] to investigate the sociodemographic predictors (independent variables) of changes in physical activity, recreational screen time, sleep duration, and sleep quality (dependent variables) during the early stages of the pandemic in Chile."}