Letters Section Editor: Stephen J. Lurie,
MD, PhD, Senior Editor.
To the Editor: Dr Velicer and colleagues1 estimated the relative risk of breast cancer by
odds ratios derived from unconditional logistic regression models adjusted
only for age and length of enrollment. Breast cancer risk and frequent use
of antibiotics were both associated with higher education, being overweight,
early menarche, positive family history, dense mammograms, menopausal status,
and previous hormone treatment.
Lyman GH, Culakova E, Griggs J. Use of Antibiotics and Risk of Cancer. JAMA. 2004;291(22):2699. doi:10.1001/jama.291.22.2700-a