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Letters
June 9, 2004

Use of Antibiotics and Risk of Cancer

Author Affiliations
 

Letters Section Editor: Stephen J. Lurie, MD, PhD, Senior Editor.

JAMA. 2004;291(22):2699. doi:10.1001/jama.291.22.2699-b

To the Editor: Although Dr Velicer and colleagues1 controlled for confounding by indication for antibiotic use and the use of oral contraceptives, they apparently did not consider adjusting for comorbidity. There are several measures of comorbidity that the authors might have used.2 The authors also did not consider the potential impact of use of nonsteroidal anti-inflammatory drugs (NSAIDs). While information about total NSAID use may not have been available from the database, use of prescription NSAIDs would be recorded. Although collected from a descriptive standpoint, other well-known factors associated with risk of breast cancer, such as ages at menarche and menopause, parity, family history of breast cancer, and body mass index, were not included in the analysis and could have affected the results.

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