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Distant metastasis rate (DMR) of four groups. Luminal A type [hazard ratio (HR)=0.99, 95% confidence interval (95% CI), 0.16−5.93; P=0.988). Luminal B type (HR=2.00, 95% CI, 0.53−7.52; P=0.307). Endocrine therapy (ET) group (HR=3.87, 95% CI, 0.92−16.20; P=0.064).
