title: Problems and issues with door-to-door, two-phase surveys: an illustration from central Spain.
abstract: In 1994-1995, a screening and examination survey was conducted to ascertain the prevalence of dementia, Parkinson's disease and stroke in two urban communities and one rural community of central Spain. We use this survey to illustrate many nonclinical aspects of conducting two-phase prevalence surveys. Special emphasis is given to two common weaknesses in such surveys: screening nonparticipation and screening validation.
authors.affiliation: Department of Neurology, Hospital Universitario 12 de Octubre, Madrid, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Bermejo
authors.forename: R
authors.initials: R
authors.lastname: Gabriel
authors.forename: S
authors.initials: S
authors.lastname: Vega
authors.forename: J M
authors.initials: JM
authors.lastname: Morales
authors.forename: W A
authors.initials: WA
authors.lastname: Rocca
authors.forename: D W
authors.initials: DW
authors.lastname: Anderson
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003704:Dementia / Q000453:epidemiology*; D016021:Epidemiologic Studies; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D010300:Parkinson Disease / Q000453:epidemiology*; D010349:Patient Compliance; D015203:Reproducibility of Results; D012424:Rural Population; D012680:Sensitivity and Specificity; D013030:Spain / Q000453:epidemiology; D020521:Stroke / Q000453:epidemiology*; D014505:Urban Population