Table 2.

Univariable Cox regression model to test the association between MRI use and local/distant recurrence-free survival, among the women (age ≤ 50) diagnosed 2006–2013.

	Local recurrence		Distant recurrence
	HR (95% CI)	P-value	HR (95% CI)	P-value
MRI use	1.05 (0.55, 1.98)	0.89	1.05 (0.52, 2.14)	0.89
Exclude follow-up time <3 years	1.01 (0.52, 2.30)	0.82	1.12 (0.47, 2.67)	0.80
Exclude women with DCIS	1.06 (0.54, 2.08)	0.87	0.96 (0.47, 1.97)	0.92

Sensitivity analyses were performed by excluding women with follow-up time under 3 years, or DCIS.