UNASSIGNED: Preoperative breast magnetic resonance imaging (MRI) use among Medicare beneficiaries with @entity0 has substantially increased from 2005 to 2009. We sought to identify factors associated with preoperative breast MRI use among @entity1 diagnosed with @entity3821 ( @entity3821 ) or stage I-III invasive @entity0 (IBC). Using Surveillance, Epidemiology, and End Results and Medicare data from 2005 to 2009 we identified @entity1 ages 66 and older with @entity3821 or stage I-III IBC who underwent breast-conserving surgery or mastectomy. We compared preoperative breast MRI use by @entity1 , @entity5 and hospital characteristics stratified by @entity3821 and IBC using multivariable logistic regression. From 2005 to 2009, preoperative breast MRI use increased from 5.9% to 22.4% of @entity1 diagnosed with @entity3821 and 7.0% to 24.3% of @entity1 diagnosed with IBC. Preoperative breast MRI use was more common among @entity1 who were younger, married, lived in higher median income zip codes and had no comorbidities. Among @entity1 with IBC, those with lobular disease, @entity5 (<1 cm) and those with @entity172 receptor negative @entity5 were more likely to receive preoperative breast MRI. @entity1 with @entity3821 were more likely to receive preoperative MRI if @entity5 were larger (>2 cm). The likelihood of receiving preoperative breast MRI is similar for @entity1 diagnosed with @entity3821 and IBC. Use of MRI is more common in @entity1 with IBC for @entity5 that are lobular and smaller while for @entity3821 MRI is used for evaluation of larger lesions.

Factors Associated with Preoperative Magnetic Resonance Imaging Use among Medicare Beneficiaries with Nonmetastatic XXXX .

@entity1 :: ('9606', 'Species') :: ['women', 'patient', 'Women'] @entity172 :: ('MESH:D004967', 'Chemical') :: ['estrogen'] @entity3821 :: ('MESH:D002285', 'Disease') :: ['ductal carcinoma in situ', 'DCIS'] @entity0 :: ('MESH:D001943', 'Disease') :: ['breast cancer'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'smaller tumors', 'tumors']
@entity0 :: (MESH:D001943,Disease) :: ['Breast Cancer']
