title: Mortality ratios are a powerful tool which must not be misused.
authors.forename: Alastair
authors.initials: A
authors.lastname: McLellan
mesh_terms: D006302:Health Services Research; D017052:Hospital Mortality / Q000639:trends*; D006801:Humans; D011785:Quality Assurance, Health Care; D013222:State Medicine; D006113:United Kingdom