TABLE 2.

Adjusted logistic regression predicting receipt of sentinel lymph node biopsy (SLNB) versus axillary lymph node dissection (ALND) (n = 25,993)

	OR (95% CI)	p value	Overall p value
Molecular subtype			<0.001
Luminal	Reference
HER2+	0.888 (0.802–0.982)	0.02
TNBC	0.793 (0.712–0.884)	<0.001
Age (years)			<0.001
≥70	Reference
40–69	0.694 (0.643–0.749)	<0.001
<40	0.591 (0.494–0.705)	<0.001
Race			<0.001
White	Reference
Black	0.825 (0.74–0.919)	<0.001
Other	0.836 (0.722–0.967)	0.02
Year of diagnosis			<0.001
2009	Reference
2010	1.563 (1.199–2.038)	<0.001
2011	4.935 (3.761–6.475)	<0.001
2012	7.211 (5.489–9.472)	<0.001
2013	9.601 (7.278–12.664)	<0.001
2014	13.018 (9.819–17.259)	<0.001
Education level			0.19
≤80% HS graduation rate	Reference
>80% HS graduation rate	1.052 (0.977–1.132)	0.18
Income level ($)			0.86
<35,000	Reference
≥35,000	0.993 (0.913–1.079)	0.86
Insurance			0.99
Private	Reference
Government	1.004 (0.939–1.073)	0.91
Not insured	1.016 (0.814–1.268)	0.89
Facility type			<0.001
Academic	Reference
Integrated network	1 (0.832–1.203)	1.00
Comprehensive	0.888 (0.786–1.005)	0.06
Community	0.665 (0.57–0.777)	<0.001
Facility location			<0.001
South	Reference
Midwest	0.755 (0.661–0.864)	<0.001
Northeast	0.983 (0.857–1.126)	0.80
West	1.049 (0.903–1.219)	0.53
Charlson/Deyo comorbidity score			0.72
0	Reference
1	1.006 (0.922–1.098)	0.89
≥2	0.935 (0.795–1.1)	0.42
Clinical T stage			<0.001
1	Reference
2	0.813 (0.763–0.866)	<0.001
Grade			<0.001
1	Reference
2	0.857 (0.795–0.923)	<0.001
3	0.648 (0.592–0.71)	<0.001

OR odds ratio, CI confidence interval, HER2 human epidermal growth factor 2, TNBC triple-negative breast cancer, HS high school