Competing Risk for a Diagnosis of Invasive Breast Cancer

To the Editor In their recent article in JAMA Oncology, Brentnall et al reported on long-term results from a praiseworthy cohort study that observed women who completed a breast cancer risk assessment until the diagnosis of invasive breast cancer or censoring. Women were censored at death, diagnosis of ductal carcinoma in situ, when they reached 75 years of age, or at the end of study follow-up.

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