caa a22 4500 477084605 CHVBK 20180405111500.0 cr unu---uuuuu 170330e19960201xx s 000 0 eng 10.1007/BF00435965 doi (NATIONALLICENCE)springer-10.1007/BF00435965 Establishing equivalence between scaled measures of quality of life [Elektronische Daten] [R. Gonin, S. Lloyd, D. Cella] In this paper, methodologies which have been used in the pharmaceutical industry to demonstrate the equivalence of drug preparations, are applied to the measurement of quality of life (QOL). This approach is feasible when the generated data are measured on the same scale. Data from the quality of life instruments are transformed into interval scales by means of an appropriate scaling procedure. It is demonstrated that equivalence of QOL instruments is linked by a linear relationship between the QOL instruments Functional Assessment of Cancer Therapy (FACT) and the Functional Living Index-Cancer (FLIC). The linear relationship is derived using orthogonal least squares regression which takes into account that both measures are subject to error. Rapid Science Publishers, 1996 Bias nationallicence bio-equivalence nationallicence bootstrap standard errors nationallicence Functional Assessment of Cancer Therapy nationallicence Functional Living Index-Cancer nationallicence orthogonal least squares nationallicence quality of life nationallicence Gonin R. Division of Biostatistics, Department of Medicine, Indiana University Medical School, 46260, Indianapolis, IN, USA aut Lloyd S. Department of Psychology and Social Sciences, Rush-Presbyterian-St Luke's Medical Centre, 60612, Chicago, IL, USA aut Cella D. Department of Psychology and Social Sciences, Rush-Presbyterian-St Luke's Medical Centre, 60612, Chicago, IL, USA aut Quality of Life Research Kluwer Academic Publishers 5/1(1996-02-01), 20-26 0962-9343 5:1<20 1996 5 11136 https://doi.org/10.1007/BF00435965 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00435965 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gonin R. Division of Biostatistics, Department of Medicine, Indiana University Medical School, 46260, Indianapolis, IN, USA aut NATIONALLICENCE 700 1- Lloyd S. Department of Psychology and Social Sciences, Rush-Presbyterian-St Luke's Medical Centre, 60612, Chicago, IL, USA aut NATIONALLICENCE 700 1- Cella D. Department of Psychology and Social Sciences, Rush-Presbyterian-St Luke's Medical Centre, 60612, Chicago, IL, USA aut NATIONALLICENCE 773 0- Quality of Life Research Kluwer Academic Publishers 5/1(1996-02-01), 20-26 0962-9343 5:1<20 1996 5 11136 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer