For patients with breast cancer, geographic and social disparities are independent determinants of access to specialized surgeons. A eleven-year population-based multilevel analysis

Table 2 Univariate and multivariate analyses of overall survival according to the surgeon class (N = 3928)

	Overall survival (%)	Univariate analysis Log-Rank p-value	Cox Multivariate analysis
	Overall survival (%)	Univariate analysis Log-Rank p-value	Hazard ratio (95% CI*)	p-value
Surgeon class
High-volume	87.2	< 0.001	0.81 (0.67-0.98)	0.027
Others	81.6		1
Age at diagnosis
< 50 years old	90.0	< 0.001	0.87 (0.68-1.11)	0.267
50 to 74 years old	89.6		1
> 74 years old	61.2		3.31 (2.71-4.04)	< 0.001
T stage
T1	90.4	< 0.001	1
T2	76.6		1.67 (1.35-2.05)	< 0.001
T3 or 4	51.9		2.70 (2.00-3.63)	< 0.001
Node status
N0	90.4	< 0.001	1	< 0.001
N+	76.2	< 0.001	1.92 (1.58-2.32)	< 0.001
Metastasis status
M0	86.8	< 0.001	1	< 0.001
M+	34.8	< 0.001	3.32 (2.37-4.64)	< 0.001
At least one comorbidity
Yes	87.5	< 0.001	1.04 (0.85-1.26)	0.720
No	79.7	< 0.001	1	0.720
Circumstances of diagnosis
Screening	93.0	< 0.001	0.54 (0.43-0.68)	< 0.001
Clinical symptoms	83.1	< 0.001	1	< 0.001