MKI67 and breast cancer: Furthermore, menopausal status (postmenopausal vs. premenopausal: HR 2.060, 95% CI 1.41–3.00, p < 0.001), pathologic T stage (T2 vs. T1: HR 1.740, 95% CI 1.26–2.40, P = 0.001), Ki67 (>14% vs. ≤14%: HR 1.550, 95% CI 1.01–2.37, p = 0.043), and BMI (obese vs. normal weight: HR 1.740, 95% CI 1.08–2.79, p = 0.022) were independent risk factors for DFS in early‐stage BC patients with negative SLN (Table S2).