title: Hierarchical linear models: a multilevel data analysis technique.
authors.affiliation: School of Nursing, State University of New York at Buffalo.
authors.forename: Y W
authors.initials: YW
authors.lastname: Wu
mesh_terms: D016304:Hospitals, Private / Q000706:statistics & numerical data; D006779:Hospitals, Public / Q000706:statistics & numerical data; D006801:Humans; D007902:Length of Stay / Q000706:statistics & numerical data; D016014:Linear Models; D012720:Severity of Illness Index; D013223:Statistics as Topic / Q000379:methods