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Efficiency of two-phase methods with focus on a planned population-based case-control study on air pollution and stroke
BACKGROUND: We plan to conduct a case-control study to investigate whether exposure to nitrogen dioxide (NO(2)) increases the risk of stroke. In case-control studies, selective participation can lead to bias and loss of efficiency. A two-phase design can reduce bias and improve efficiency by combini...
| Autores principales: | , , |
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| Formato: | Texto |
| Lenguaje: | English |
| Publicado: |
BioMed Central
2007
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| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2174445/ https://www.ncbi.nlm.nih.gov/pubmed/17988388 http://dx.doi.org/10.1186/1476-069X-6-34 |