Response rates and selection problems, with emphasis on mental health variables and DNA sampling, in large population-based, cross-sectional and longitudinal studies of adolescents in Norway
<p>Abstract</p> <p>Background</p> <p>Selection bias is a threat to the internal validity of epidemiological studies. In light of a growing number of studies which aim to provide DNA, as well as a considerable number of invitees who declined to participate, we discuss re...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
BMC
2010-10-01
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| Series: | BMC Public Health |
| Online Access: | http://www.biomedcentral.com/1471-2458/10/602 |