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Power and sample size calculations for longitudinal studies estimating a main effect of a time-varying exposure
Existing study design formulas for longitudinal studies assume that the exposure is time invariant or that it varies in a manner that is controlled by design. However, in observational studies, the investigator does not control how exposure varies within subjects over time. Typically, a large number...
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| Hlavní autoři: | , , |
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| Médium: | Artigo |
| Jazyk: | Inglês |
| Vydáno: |
2010
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| Témata: | |
| On-line přístup: | https://ncbi.nlm.nih.gov/pmc/articles/PMC3777279/ https://ncbi.nlm.nih.gov/pubmed/20547587 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1177/0962280210371563 |
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