Kaplan-Meier survival curves for breast cancer patients.

<p>The young age group of patients had worse prognosis than other age groups in (A) disease-free (<i>p</i> = 0.003) and (B) overall survival (<i>p</i> = 0.015). Patients younger than 40 years had worse prognosis than the older age group in (C) disease-free (<i>p</i> = 0.006) and (D) overall survival (<i>p</i> = 0.008).