About: http://webisa.webdatacommons.org/160032654

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Other potential covariates measured in the survey, including age, sex, specialty, participation in managed care, or perceived usefulness of different types of studies, did not reach significance and were omitted from the final models.
http://www.w3.org/ns/prov#wasQuotedFrom	jamanetwork.com