Telephone interviews can be used to collect follow-up data subsequent to no response to postal questionnaires in clinical trials.
OBJECTIVE: Follow-up data were collected using postal questionnaires and if participants did not respond, then data was collected using telephone interviews. The objectives of this study were to examine, for the two methods, how respondents differed in characteristics and whether the observed treat...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2012
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