title: Focus on methods: chi-square analysis.
authors.affiliation: Strategic Outcomes Services, Inc, Research Triangle Park, North Carolina, USA.
authors.forename: Chris M
authors.initials: CM
authors.lastname: Kozma
mesh_terms: D016009:Chi-Square Distribution; D019468:Disease Management; D005260:Female; D006801:Humans; D008297:Male; D014481:United States