. 2017 Nov 16;143(11):1111–1116. doi: 10.1001/jamaoto.2017.1694

Table 1. Cox Regression Analysis Comparing Hospital-Level Hazard of Mortality by Percent of Cases With Negative Margins^a.

Negative Margin Threshold, %	Hospitals, No.	Patients, No.	HR (95% CI)	P Value
80	396	36 998	0.99 (0.96-1.02)	.37
85	243	22 486	0.99 (0.96-1.02)	.40
90	105	9003	0.92 (0.88-0.96)	<.001
95	43	831	0.95 (0.84-1.07)	.39

Abbreviation: HR, hazard ratio.

^{^a}

Model includes sex, age, race, comorbidities, site, cN stage, pT stage, number of positive nodes, receipt of adjuvant therapy, extracapsular extension, insurance, income, education level, hospital volume, and hospital type. Head and neck cancers; data from the National Cancer Database, 2004 to 2013.

Table 1. Cox Regression Analysis Comparing Hospital-Level Hazard of Mortality by Percent of Cases With Negative Marginsa.

Table 1. Cox Regression Analysis Comparing Hospital-Level Hazard of Mortality by Percent of Cases With Negative Margins^a.