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The solid curve represents the continuous relationship between Ki-67 LI and the risk of ipsilateral recurrence. The underlying model is adjusted for menopause, body mass index, surgical margins, HER2, ER, grade, presence of necrosis and microcalcifications, type of surgery, RT and HT. Dotted curves represent 95% CIs. Ki-67 LI of 14% is chosen as the reference value (HR=1).
