Table 3

Results of multivariate logistic regression analysis comparing any biopsy with surgery alone

Variable	OR (95% CI)	Estimate	SE	p value
Age, yr
< 50
50–69		−0.234	0.102	0.022
≥ 70		−0.164	0.118	0.17
LHIN
Central	1.00
Central East	1.04 (0.78–1.40)	0.043	0.150	0.77
Central West	1.44 (0.97–2.13)	0.362	0.202	0.07
Champlain	1.53 (0.99–2.36)	0.423	0.222	0.06
Erie St. Clair	1.09 (0.73–1.63)	0.088	0.205	0.67
Hamilton Niagara	1.66 (1.20–2.29)	0.507	0.164	0.002
Mississauga Halton	0.80 (0.57–1.11)	−0.227	0.170	0.18
Northeast	0.42 (0.29–0.62)	−0.856	0.193	< 0.001
North Simcoe Muskoka	1.27 (0.82–1.97)	0.242	0.223	0.28
Northwest	0.14 (0.07–0.27)	−1.969	0.339	< 0.001
Southwest	2.24 (1.54–3.27)	0.807	0.193	< 0.001
Toronto Central	1.15 (0.84–1.57)	0.138	0.159	0.38
Waterloo Wellington	0.59 (0.41–0.86)	−0.525	0.193	0.007
Income quintile
1
2		0.027	0.490	0.96
3		−0.813	0.481	0.09
4		−0.989	0.486	0.041
5		−0.877	0.443	0.048
Rural residence
No
Yes		−0.200	0.266	0.45
Primary care provider
No
Yes		−0.602	0.385	0.19
Breast consultation quintile
1	1.00
2	7.31 (5.45–9.81)	1.989	0.015	< 0.001
3	4.62 (3.52–6.07)	1.531	0.139	< 0.001
4	3.50 (2.68–4.57)	1.253	0.136	< 0.001
5	2.96 (2.26–3.88)	1.087	0.138	< 0.001
Radiologist image-guided biopsy quintile
1	1.00
2	1.08 (0.85–1.38)	0.080	0.124	0.52
3	1.08 (0.85–1.38)	0.080	0.123	0.51
4	1.37 (1.08–1.74)	0.315	0.123	0.011
5	2.05 (1.56–2.69)	0.719	0.139	< 0.001
Income quintile / primary care provider
1
2 / Yes		−0.232	0.507	0.65
3 / Yes		0.719	0.499	0.15
4 / Yes		0.937	0.503	0.06
5 / Yes		1.138	0.461	0.014
Age/rural residence
50–69 / Yes		0.669	0.319	0.036
≥ 70 / Yes		0.116	0.340	0.73

CI = confidence interval; LHIN = local health integration network; OR = odds ratio; SE = standard error.