Table 4.

Multivariable logistic regression for bilateral mastectomy

Characteristic	OR (95% CI)	P value
Age
Over 50	Reference
Under 50	3.47 (2.57 to 4.70)	< 0.001
MRI use
No	Reference
Yes	1.38 (1.02 to 1.87)	0.036

Abbreviations: CI confidence interval, MRI magnetic resonance imaging, OR odds ratio.