FREE NEJM E-TOC    HOME   |   SUBSCRIBE   |   CURRENT ISSUE   |   PAST ISSUES   |   COLLECTIONS   |   Search Term  Advanced Search

Sign in | Get NEJM's E-Mail Table of Contents — Free | Subscribe

Previous Volume 356:1885-1887 May 3, 2007 Number 18 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

	Full Text PDF PDA Full Text Purchase this article Add to Personal Archive Add to Citation Manager Notify a Friend E-mail When Cited E-mail When Letters Appear Related Article by Boyd, N. F.

To the Editor: Boyd and colleagues (Jan. 18 issue)¹ report a case–control study, nested within data derived from previous cohort studies, that strongly supports breast density as a risk factor for breast cancer. However, using only 1 matched control for the analysis, in spite of the identification of 10 potential controls for each case, limited the statistical conclusions. In addition, it is not clear how the breast cancers were ultimately discovered. If the majority of the cancers were eventually diagnosed on mammography, then despite the delay in diagnosis, annual mammography remains a valuable screening tool even in women with dense . . . [Full Text of this Article]

HOME  |  SUBSCRIBE  |  SEARCH  |  CURRENT ISSUE  |  PAST ISSUES  |  COLLECTIONS  |  PRIVACY  |  HELP  |  beta.nejm.org Comments and questions? Please contact us. The New England Journal of Medicine is owned, published, and copyrighted © 2008 Massachusetts Medical Society. All rights reserved.