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Winkler, V.* ; Leitzmann, M.* ; Obi, N.* ; Ahrens, W.* ; Edinger, T.* ; Giani, G.* ; Linseisen, J. ; Löffler, M.* ; Michels, K.* ; Nöthlings, U.* ; Schipf, S.* ; Kluttig, A.* ; Wichmann, H.-E. ; Hoffmann, B.* ; Jöckel, K.-H.* ; Becher, H.*

Response in individuals with and without foreign background and application to the National Cohort in Germany: Which factors have an effect?

Int. J. Public Health 59, 555-563 (2014)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
OBJECTIVES: Response rates in epidemiologic studies vary widely. This study examines response rates of potential study participants according to foreign versus German background and investigates effects of recruitment strategies. METHODS: Response rates and characteristics of recruitment procedures from feasibility studies for a large cohort study conducted in 2011 were analyzed. RESULTS: Among 1,235 participants the proportion of recruited individuals with a foreign background was 17.3 % (95 % confidence interval 15.3-19.5 %), significantly lower than in the sampling frame (23.1 %). The difference between observed and expected proportion was high among individuals with Turkish background and smaller among ethnic Germans from the Former Soviet Union and other foreign background groups. Common recruitment strategies to increase the response had positive effects in all groups. For the planned recruitment strategy in the forthcoming German National Cohort, we estimate an overall response of approximately 50 %. CONCLUSIONS: Individuals with Turkish background may need particular efforts to be adequately represented in a population-based cohort in Germany. Other foreign background groups are relatively well represented using standard procedures. An adequate response can be obtained under carefully planned recruitment strategies.  
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Response ; Epidemiologic Study ; Migrants ; Germany ; German National Cohort (nako) ; Recruitment Strategy
ISSN (print) / ISBN 0303-8408
e-ISSN 1420-911X
Journal International Journal of Public Health
Quellenangaben Volume: 59, Issue: 3, Pages: 555-563 Article Number: , Supplement: ,
Publisher Springer
Publishing Place Basel
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Epidemiology II (EPI2)
Institute of Epidemiology (EPI)