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00 and standard treatment (P less then 0.00. In multivariate analysis, the standard treatment remained an independent protective factor for death (hazard ratio=0.061, 95% confidence interval=0.007-0.537, P=0.012). Conclusion Although the prognosis of patients with OC and associated CI was poor, those who underwent the standard treatment still benefited. © 2020 Yuan et al.Background Demographic aging results in increased incidence of old-age disability. Frailty is a major factor contributing to old-age disability. The aim of this st