title: Multilevel models in health outcomes research. Part I: Theory, design, and measurement.
authors.affiliation: School of Nursing, University of Pennsylvania, Philadelphia, PA 19104, USA. elake@nursing.upenn.edu
authors.forename: Eileen T
authors.initials: ET
authors.lastname: Lake
mesh_terms: D000704:Analysis of Variance; D006801:Humans; D015403:Nursing Evaluation Research / Q000379:methods*; D017063:Outcome Assessment, Health Care / Q000379:methods*; D015203:Reproducibility of Results; D012107:Research Design; D013223:Statistics as Topic / Q000379:methods*