Two-phase prevalence surveys with screening (phase 1) and examination (phase 2) are useful for some chronic diseases.
Attrition, which may bias estimates, occurs in either phase because some eligible subjects die before contact, some refuse to cooperate, some are incapacitated, and some are unreachable.
This investigation relates to a survey of neurologic diseases conducted in three municipalities of Sicily (prevalence date, November 1, 1987) and considers the attrition experienced and the use of proxy respondents in phase 1 and auxiliary information in phase 2 to offset, in part, this attrition.
Regarding case finding, the salvage effort was more productive for deceased and incapacitated subjects.
The age, sex, and household size of the subject were related to phase 1 attrition, but only age was related for all four attrition groups-deceased, refusing, incapacitated, and unreachable subjects.
Mots-clés Pascal : Epidémiologie, Méthodologie, Biais méthodologique, Prévalence, Système nerveux pathologie, Sicile, Homme, Collecte donnée, Questionnaire, Italie, Europe
Mots-clés Pascal anglais : Epidemiology, Methodology, Methodological bias, Prevalence, Nervous system diseases, Sicily, Human, Data gathering, Questionnaire, Italy, Europe
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 94-0293072
Code Inist : 002B30A01A1. Création : 199406.