title: Quantity quotient reporting. Comparison of various models.
abstract: Quantity quotient (QQ) reporting has been proposed by several authors to improve or support the present situation of presenting quantitative laboratory results. This proposal is based on a concept (symmetrical model) known from the intelligence quotient, which was developed to make intelligence tests comparable. In laboratory medicine, however, most measurands follow a non-symmetrical (skewed) distribution, leading to a compression of the QQ values at the lower end of the reference interval. This effect can be avoided by several alternatives. Three models considering non-symmetrical distributions are compared with the symmetrical model in the present study. The corresponding algorithms can be easily handled on the Excel platform. Graphical presentation of the QQ allows a quick overview of test results if they occur in a large number.
authors.forename: Rainer
authors.initials: R
authors.lastname: Haeckel
authors.forename: Werner
authors.initials: W
authors.lastname: Wosniok
authors.forename: Theo
authors.initials: T
authors.lastname: Postma
mesh_terms: D000465:Algorithms; D019411:Clinical Laboratory Techniques / Q000592:standards*; D006801:Humans; D007361:Intelligence Tests; D008962:Models, Theoretical; D012016:Reference Values