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@ARTICLE{Weigl:137562,
      author       = {K. Weigl$^*$ and K. Tikk$^*$ and M. Hoffmeister$^*$ and E.
                      N. De Toni and J. Hampe and F. Kolligs and S. J. Klug and U.
                      Mansmann and D. Nasseh and J. Radlovic$^*$ and M. Schwab$^*$
                      and D. Schweigler$^*$ and A. Stephan and H. Brenner$^*$},
      title        = {{A} web-based survey among adults aged 40-54 years was
                      time-effective and yielded stable response patterns.},
      journal      = {Journal of clinical epidemiology},
      volume       = {105},
      issn         = {0895-4356},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {DKFZ-2018-01442},
      pages        = {10-18},
      year         = {2019},
      abstract     = {We want to present information about response patterns
                      obtained by web-based survey in a large-scale
                      epidemiological study.Within the RAPS (Risk Adapted
                      Prevention Strategies for colorectal cancer) study, we
                      invited 160,000 randomly selected persons aged 40-54 years
                      in three large German cities from 2015 to 2016 to complete a
                      web-based questionnaire on colorectal cancer risk factors
                      and screening (97 items, average time for completion 15
                      minutes). Invitation letters and up to two reminder letters
                      were sent to each individual.A total of $21.4\%$ of women
                      and $18.0\%$ of men completed the questionnaire. Overall
                      cumulative response rates were $7.5\%,$ $14.3\%$ and
                      $19.6\%$ after the initial invitation letter, and the first
                      and second reminder, respectively, with prevalences of and
                      associations of key epidemiological parameters (such as
                      family history of cancer, previous colonoscopy etc.) being
                      remarkably stable over across waves of responses. For
                      example, the sex and age distribution of the sample did not
                      change with additional answers gained from additional
                      letters.Web-based questionnaires are feasible, cost- and
                      time-effective in the setting of large-scale epidemiological
                      studies. Although response patterns were remarkably stable
                      over several rounds of reminders with substantially
                      increasing cumulative response rates, future research should
                      address possibilities to further enhance response rates.},
      cin          = {C070 / L801 / L701 / L101 / G110},
      ddc          = {610},
      cid          = {I:(DE-He78)C070-20160331 / I:(DE-He78)L801-20160331 /
                      I:(DE-He78)L701-20160331 / I:(DE-He78)L101-20160331 /
                      I:(DE-He78)G110-20160331},
      pnm          = {313 - Cancer risk factors and prevention (POF3-313)},
      pid          = {G:(DE-HGF)POF3-313},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:30196128},
      doi          = {10.1016/j.jclinepi.2018.08.021},
      url          = {https://inrepo02.dkfz.de/record/137562},
}