Is Opium a Real Risk Factor for Esophageal Cancer or Just a Methodological Artifact? Hospital and Neighborhood Controls in Case-Control Studies

BACKGROUND: Control selection is a major challenge in epidemiologic case-control studies. The aim of our study was to evaluate using hospital versus neighborhood control groups in studying risk factors of esophageal squamous cell carcinoma (ESCC). METHODOLOGY/PRINCIPAL FINDINGS: We compared the resu...

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Bibliografski detalji
Glavni autori: Shakeri, Ramin, Kamangar, Farin, Nasrollahzadeh, Dariush, Nouraie, Mehdi, Khademi, Hooman, Etemadi, Arash, Islami, Farhad, Marjani, Hajiamin, Fahimi, Saman, Sepehr, Alireza, Rahmati, Atieh, Abnet, Christian C., Dawsey, Sanford M., Brennan, Paul, Boffetta, Paolo, Malekzadeh, Reza, Majdzadeh, Reza
Format: Artigo
Jezik:Inglês
Izdano: Public Library of Science 2012
Teme:
Research Article
Online pristup:https://ncbi.nlm.nih.gov/pmc/articles/PMC3291619/
https://ncbi.nlm.nih.gov/pubmed/22396792
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1371/journal.pone.0032711
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