Table 2:

Multivariate analysis of overall survival for women with metastatic breast cancer

Predictors	Total mbc cohort (N=6539)
	Hazard ratio	95% CI
Ethnicity1 (reference = Caucasian)
African American	1.84	1.39–2.45
Mixed	1.04	0.86–1.26
Age-at-diagnose (reference = 50 – 64 years)
25 – 40 years	0.85	0.67–1.07
40 – 49 years	0.89	0.77–1.03
Socio-economic status2 (reference = high SES)
Low SES	1.05	0.90–1.23
Morbidity3 (reference = low morbidity)
High morbidity	1.30	1.12–1.51
Geographic region (reference = South)
West	1.20	0.97–1.48
Midwest	0.95	0.81–1.11
Northeast	0.73	0.56–0.95
Urban / non-urban4 (reference = urban areas)
Non-urban areas	1.09	0.94–1.26
Year of diagnosis (reference = 2005–2008)
2000–2004	1.60	1.39–1.83

Bold means significant p = <0.05

¹African American: residing in predominantly African American (≥ 66%) neighborhoods

Caucasian: residing in predominantly Causasian (≥ 66%) neighborhoods

Mixed = women with Hispanic or Asian surname as well as women residing in predominantly mixed neighborhoods

²Low SES: > 25% only HS education or > 10% below poverty

High SES: <25% only HS education or <10% below poverty

³Very high morbidity: ACG score > 3.0

Low morbidity: ACG score 0 – 3.0

⁴Non-urban: all remaining categories 2 – 12

Urban: large metropolitan area of 1+ million residents [36]

ACG = Adjusted Clinical Groups, HS = high school, mbc = metastatic breast cancer, SES = socioeconomic status