Regarding patients’ clinicopathological features, more patients with large lesions (compared with T1a, T1b: OR = 9.52, 95% CI = 5.99–15.15; T1c: OR = 16.13, 95% CI = 10.53–25.00, P<0.001), high tumor grades (compared with grade I, grade II: OR = 1.97, 95% CI = 1.23–3.14, P = 0.005; grade III: OR = 3.61, 95% CI = 2.13–6.14, P<0.001), and high Ki67 levels (compared with Ki67 <14%, Ki67 ≥14%: OR = 6.37, 95% CI = 5.29–7.69, P<0.001) were given adjuvant chemotherapy. Here, MKI67 is linked to neoplasm.