Table 2.

Cox regression significant main effects and interactions of ethnicity, neighborhood poverty, barrio neighborhood and primary insurer on overall 8-year survival (N = 3,040)

Predictor variables (baseline comparison)	Hazard ratio	95 % CI
Main effects
Ethnicity (Non-Hispanic white)
Mexican American	3.43	1.86, 6.33
Neighborhood poverty (low poverty)
High poverty (≥30 % poor)	1.71	1.45, 2.03
Primary health insurer (uninsured or Medicaid)
Private or Medicare	0.76	0.59, 0.98
Interaction effects
Ethnicity by neighborhood poverty	0.32	0.16, 0.62
Ethnicity by primary health insurer	0.39	0.19, 0.80
Ethnicity by barrio neighborhood by primary insurer	1.85	1.01, 3.38

Separate models for Mexican American and non-Hispanic white women
	Mexican America (n = 194)	Non-Hispanic white (n = 2,846)
	HR (95 % CI)	HR (95 % CI)
Neighborhood poverty	0.56 (0.30, 1.06)	1.71 (1.43, 2.04)
Primary health insurer	0.29 (0.13, 0.65)	0.76 (0.59, 0.98)
Barrio by primary insurer	1.95 (1.08, 3.51)	1.02 (0.71, 1.46)

The pattern and significance of overall and cancer-specific survival analyses were nearly identical