From: Efficacy of adjuvant chemotherapy according to hormone receptor status in young patients with breast cancer: a pooled analysis
Characteristic
Relative risk
95% confidence interval
P value
ER-negative
1.65
1.09–2.50
0.02
Node-positive
1.70
0.79–3.66
0.17
Tumor size >2 cm
1.66
1.09–2.52
Adjuvant chemotherapy
1.02
0.48–2.17
0.96