Table 4.

Factors associated with recurrence and death among cases with stage i–iii breast cancer diagnosed during pregnancy and their controls

	Recurrence						Death
	Univariate			Multivariate			Univariate			Multivariate
	HRa	95% CIb	P value	HR	95% CI	P value	HR	95% CI	P value	HR	95% CI	P value
Case versus control	1.43	0.70–2.93	0.32	1.51	0.56–4.06	0.41	1.91	0.70–5.21	0.20	2.85	0.57–14.29	0.20
Stage	1.34	0.69–2.61	0.38	2.14	0.83–5.51	0.11	1.33	0.55–3.24	0.53	2.21	0.53–9.21	0.28
Grade	0.89	0.49–1.61	0.71	1.10	0.50–2.45	0.81	1.39	0.61–3.16	0.44	1.24	0.41–3.74	0.71
ER-positive	1.37	0.55–3.41	0.50	1.16	0.41–3.32	0.78	0.51	0.13–1.94	0.32	0.38	0.08–1.84	0.23
Negative margins	0.99	0.38–2.62	0.99	1.11	0.30–1.08	0.88	1.15	0.31–4.41	0.84	0.93	0.15–5.59	0.94
Receipt of chemotherapy	0.67	0.23–1.98	0.47	0.50	0.10–2.53	0.40	1.50	0.31–7.20	0.61	1.08	0.11–10.45	0.95

^aHR hazard ratio

^bCI confidence interval