title: Intervention studies in nursing: is the effect due to the independent variable?
authors.affiliation: University of Minnesota School of Nursing, Minneapolis.
authors.forename: E C
authors.initials: EC
authors.lastname: Egan
authors.forename: M
authors.initials: M
authors.lastname: Snyder
authors.forename: K R
authors.initials: KR
authors.lastname: Burns
mesh_terms: D002985:Clinical Protocols / Q000592:standards*; D015897:Comorbidity; D015987:Effect Modifier, Epidemiologic; D006272:Health Facility Environment / Q000592:standards; D006801:Humans; D009732:Nursing Care / Q000145:classification / Q000592:standards; D015403:Nursing Evaluation Research / Q000379:methods / Q000592:standards*; D015203:Reproducibility of Results; D012107:Research Design / Q000592:standards; D009626:Terminology as Topic