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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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| 主要な著者: | , , |
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| フォーマット: | Artigo |
| 言語: | Inglês |
| 出版事項: |
2010
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| 主題: | |
| オンライン･アクセス: | 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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