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Questionnaires in clinical trials: guidelines for optimal design and administration
A good questionnaire design for a clinical trial will minimise bias and maximise precision in the estimates of treatment effect within budget. Attempts to collect more data than will be analysed may risk reducing recruitment (reducing power) and increasing losses to follow-up (possibly introducing b...
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| Formato: | Texto |
| Lenguaje: | English |
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BioMed Central
2010
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| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2823735/ https://www.ncbi.nlm.nih.gov/pubmed/20064225 http://dx.doi.org/10.1186/1745-6215-11-2 |