MODYS—A Modular Control and Documentation System for Epidemiological Studies
The quality of data collected in epidemiological observational research critically depends on the appropriate procedures for recruitment of study subjects. In this chapter, we describe the requirements and standard procedures for contacting, recruiting and documenting in field studies. We present a software tool, MODYS (modular control and documentation system), that was specifically designed to control and document all recruitment steps in population-based studies. The general design of MODYS is outlined, and its implementation for the IDEFICS study is presented in detail. Furthermore, the analysis of paradata recorded by MODYS is demonstrated with examples from the IDEFICS study.
The development of instruments, the baseline data collection and the first follow-up work as part of the IDEFICS study (www.idefics.eu) were financially supported by the European Commission within the Sixth RTD Framework Programme Contract No. 016181 (FOOD). The most recent follow-up including the development of new instruments and the adaptation of previously used instruments was conducted in the framework of the I.Family study (www.ifamilystudy.eu) which was funded by the European Commission within the Seventh RTD Framework Programme Contract No. 266044 (KBBE 2010-14).
We thank all families for participating in the extensive examinations of the IDEFICS and I.Family studies. We are also grateful for the support from school boards, headmasters and communities.
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