Quantification of the completeness of follow-up. Catalogue en ligne

Titre :	Quantification of the completeness of follow-up. (2002)
Auteurs :	Taane-G CLARK ; Douglas-G ALTMAN ; Bianca-L DE STAVOLA ; Centre for Statistics In Medicine. Institute of Health Sciences. Oxford. GBR
Type de document :	Article
Dans :	Lancet (The) (vol. 359, n° 9314, 2002)
Pagination :	1309-1310
Langues:	Anglais
Mots-clés :	Essai thérapeutique ; Examen complémentaire ; Surveillance ; Biais ; Homme
Résumé :	[BDSP. Notice produite par INIST-CNRS kR0x9BGY. Diffusion soumise à autorisation]. Completeness of follow-up Is Important, especially in clinical trials, since unequal follow-up In the treatment groups can bias the analysis of results. In survival studies, information on participants who do not complete the study Is often omitted because their data can be Included up to the time at which they were lost to follow-up. We propose a simple measure of completeness that Is the ratio of the total observed person-time and the potential person-time of follow-up In a study. Our measure Is easy to calculate, can be illustrated plctorially, and can be used to identify subgroups with especially poor follow-up.

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