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Invited Commentary: Is It Time to Retire the “Pack-Years” Variable? Maybe Not!
Cumulative exposure—the product of intensity and duration for a constant exposure rate or its integral over time if variable—has been widely used in epidemiologic analyses of extended exposures, for example, the “pack-years” variable for tobacco smoking. Although the effects of intensity and duratio...
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| Formato: | Artigo |
| Lenguaje: | Inglês |
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Oxford University Press
2014
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| Acceso en línea: | https://ncbi.nlm.nih.gov/pmc/articles/PMC3895098/ https://ncbi.nlm.nih.gov/pubmed/24355333 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1093/aje/kwt274 |
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