Impact of Insurance Coverage on Outcomes in Primary Breast Sarcoma

Table 5

Multivariate Cox proportional hazard models of the effect of insurance status on overall survival in patients with breast sarcoma versus carcinoma.

	Multivariate analysis^a
	HR (95% CI)
Interaction between insurance status and breast cancer type^b
Medicaid versus private; sarcoma versus carcinoma	—	<0.001
Medicare versus private; sarcoma versus carcinoma	—	0.912
Breast cancer type
Carcinoma: Medicaid versus private (reference)	1.69 (1.66–1.72)	<0.001
Sarcoma: Medicaid versus private (reference)	2.48 (1.63–3.78)	<0.001

^aAdjusted for age, race, year of diagnosis, comorbidity, income, location, distance from treatment facility, educational attainment, tumor size, node status, metastatic status, tumor grade, and treatment; ^b value for the interaction tests whether there is a significant difference in the HRs for patients with Medicaid/Medicare insurance relative to private insurance in breast sarcoma versus breast carcinoma; abbreviations: HR, hazard ratio; CI, confidence interval.