Mammographic density as a predictor of breast cancer survival: the Multiethnic Cohort.

In an overall model, mammographic density was not associated with breast cancer-specific survival (HR = 0.95 per 10%; 95%CI: 0.79-1.15), but the interaction with radiotherapy was highly significant (p = 0.006).

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An inverse association that was borderline significant was detected in a Swedish cohort [ 16 ], but no adverse effect of mammographic density on survival was found in a British [ 15 ] or a US [ 17 ] cohort.

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