Comparison of a self-administered questi
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Marleen van Ooijen; Ulla I. Ivens; Christoffer Johansen; Torsten Skov
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Article
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1997
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John Wiley and Sons
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English
⚖ 44 KB
👁 2 views
Methods to collect epidemiologic data include, among other means, self-administered questionnaires and personal and telephone interviews. In some studies, these data collection methods are used simultaneously. However, little is known about the comparability of the data obtained, thus, the validity