Impact of Insurance Coverage on Outcomes in Primary Breast Sarcoma

Table 1

Cohort selection.

		No.	%
1	Total breast cancer cases diagnosed from 2004 to 2014	2,246,280	100.00%
2	Limit to female patients 18 years and older with histologically confirmed primary invasive breast sarcoma diagnosed from 2004 to 2013	741	0.03%
3	Exclude patients whose diagnosis date precedes reference date to ensure data completeness	723	0.03%
4	Exclude patients who were diagnosed at reporting facility but did not receive any treatment at that facility	696	0.03%
5	Exclude patients with unknown vital status or unknown follow-up; exclude patients diagnosed at autopsy	683	0.03%
6	Exclude if insurance status is unknown	656	0.03%
7	Limit to patients with private, Medicaid, or Medicare insurance	607	0.03%