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Personally addressed hand-signed letters increase questionnaire response: a meta-analysis of randomised controlled trials
BACKGROUND: Postal questionnaires are commonly used to collect data for health studies, but non-response reduces study sample sizes and can introduce bias. Finding ways to increase the proportion of questionnaires returned would improve research quality. We sought to quantify the effect on response...
| Autores principales: | , |
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| Formato: | Texto |
| Lenguaje: | English |
| Publicado: |
BioMed Central
2006
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| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1574304/ https://www.ncbi.nlm.nih.gov/pubmed/16953871 http://dx.doi.org/10.1186/1472-6963-6-111 |