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.
Pharmacology, Toxicology and Pharmaceutical Science
5
11%
Social Sciences
2
4%
Mathematics
1
2%
Other
6
13%
Unknown
15
32%
Attention Score in Context
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 13 December 2018.
All research outputs
#22,456,914
of 27,470,210 outputs
Outputs from Journal of Clinical Epidemiology
#4,797
of 5,151 outputs
Outputs of similar age
#274,863
of 350,409 outputs
Outputs of similar age from Journal of Clinical Epidemiology
#57
of 62 outputs
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