Kaplan Meier method female 6 human 6 Female 4 Humans 4 Kaplan-Meier Estimate 4 Prognosis 4 Proportional Hazards Models 4 adolescent 4 adult 4 aged 4 article 4 controlled study 4 male 4 prognosis 4 proportional hazards model 4 survival 4 Adolescent 2 Adult 2 Age Factors 2 Aged 2 Argentina 2 Breast Neoplasms 2 Carcinoma 2 Child 2 Child, Preschool 2 Chile 2 Cohort Studies 2 Developing Countries 2 Developing countries 2