Table 3.

Predictors of Magnetic Resonance Imaging Use Among Women Ages 66 and Older with Ductal Carcinoma In Situ or Invasive Stage I–III Breast Cancer, from the Breast Cancer Surveillance Consortium Linked to Administrative Claims Data, 2005–2010

Characteristic	Category	All cancers adjusted ORa(95% CI)
Age	66–69	Referent
	70–74	1.01 (0.78–1.30)
	75–79	0.62 (0.46–0.83)
	80–84	0.54 (0.38–0.75)
	85+	0.14 (0.07–0.27)
Race	White	Referent
	Black	0.68 (0.34–1.38)
	Other	0.98 (0.62–1.55)
Family history of breast cancer	Yes	0.99 (0.73–1.32)
	No	Referent
Breast density	Nondense	Referent
	Dense	0.95 (0.73–1.22)
Education	<High school	Referent
	High school grad	1.13 (0.62–2.08)
	Some college	1.27 (0.70–2.32)
	College grad	1.52 (0.84–2.74)
Comorbidity index	0	Referent
	1	0.86 (0.66–1.11)
	2	0.79 (0.51–1.23)
	3+	0.49 (0.25–0.93)
Year of diagnosis	2005	Referent
	2006	1.50 (1.02–2.22)
	2007	2.51 (1.72–3.65)
	2008	3.39 (2.34–4.92)
	2009	4.25 (2.92–6.17)
	2010	3.48 (2.21–5.48)
Histology	Invasive, ductal	Referent
	Invasive, lobular	2.90 (1.64–4.16)
	Invasive, lobular and ductal	2.63 (1.44–3.82)
	Invasive, other	1.35 (0.53–2.18)
Grade	Low	Referent
	Intermediate	1.07 (0.80–1.43)
	High	1.00 (0.70–1.44)
Stage	0	NA
	I	Referent
	II	1.30 (0.82–1.78)
	III	1.53 (0.78–2.27)
Size	<1 cm	Referent
	1 to <2 cm	1.06 (0.81–1.39)
	2 to <5 cm	1.26 (0.87–1.82)
	5+ cm	1.25 (0.71–2.20)
Estrogen receptor status	Positive	1.62 (1.07–2.43)
	Negative	Referent
Progesterone receptor status	Positive	0.64 (0.48–0.87)
	Negative	Referent
BCSC 5-year risk score	0 to 1	Referent
	>1 to 1.66	1.40 (0.34–5.88)
	>1.66 to 2.49	1.58 (0.58–4.27)
	>2.49 to 3.99	1.52 (0.53–4.38)
	>3.99	1.82 (0.74–4.47)

NA = not applicable as these were interaction term in model with cancer type.

^aAdjusted model includes all variables in the table in the model.

CI, confidence intervals; OR, odds ratios.