From: Response to neoadjuvant chemotherapy based on pathologic complete response in very young patients with ER-positive breast cancer: a large, multicenter, observational study
pCR rate (%)
OR (95% CI)
PI-Adjusted OR (95% CI)
Age<35
35≤Age<50
ER-positive
(N = 147)
(N = 901)
4.8
4.1
1.17 (0.51–2.67)
0.41 (0.05–3.19)
ER-negative
(N = 134)
(N = 663)
19.4
11.2
1.92 (1.17–3.13)
2.54 (1.27–5.08)