Which Has a Greater Impact on the Recurrence in Young Breast Cancer Patients: Recent Childbirth or Recent Breastfeeding?

Table 3

Risk of recurrence in PPBC patients grouped by weaning time.

Group	Unadjusted		Adjusted
	HR (95% CI)		HR (95% CI)
Postweaning group IV was used as control
Nulliparous (N = 96)	1.87 (1.04–3.37)	0.037	1.29 (0.63–2.63)	0.488
Postweaning group I (N = 161)	2.45 (1.50–4.00)	0.000	1.54 (0.87–2.74)	0.142
Postweaning group II (N = 218)	1.86 (1.16–2.98)	0.011	1.18 (0.68–2.06)	0.561
Postweaning group III (N = 303)	1.26 (0.78–2.03)	0.343	1.07 (0.64–1.79)	0.787
Postweaning group IV (N = 235)	1.00		1.00
Postweaning group IV was used as control
Nulliparous (N = 96)	1.87 (1.04–3.37)	0.037	1.29 (0.63–2.64)	0.481
Postweaning group I` (N = 102)	2.88 (1.68–4.93)	0.000	1.82 (0.98–3.36)	0.057
Postweaning group II` (N = 277)	1.85 (1.18–2.91)	0.008	1.16 (0.68–2.00)	0.583
Postweaning group III (N = 303)	1.26 (0.78–2.03)	0.343	1.08 (0.65–1.79)	0.781
Postweaning group IV (N = 235)	1.00		1.00

Adjusted for age at diagnosis, TNM stage, and biological subtype.