. Author manuscript; available in PMC: 2013 Oct 19.

Published in final edited form as: Genet Med. 2013 Feb 28;15(8):630–638. doi: 10.1038/gim.2013.5

Table 3.

OR and CIs for Hospitals that Ordered the EGFR Assay

Institution ordered EGFR assay	OR	P>\|z\|	[95% CI]
Distance to NCI CC^*	0.996	0.00	0.995	0.998
Affiliated w/ academic medical center^*	1.48	.00	1.20	1.83
NCI clinical research cooperative^*	2.06	.00	1.66	2.55
Positron emission tomography (PET scans)^*	1.44	.02	1.07	1.94
Cardiothoracic surgery^*	1.90	.00	1.52	2.37
Inpatient chemotherapy	1.15	.30	.88	1.50
Within metropolitan county^*	2.08	.00	1.48	2.91
Education at BS level above mean^*	1.46	.01	1.09	1.96
Income over $75,000 above mean^*	1.46	.03	1.04	2.05
% Black	1.30	.48	.63	2.67
Annual lung cancer cases	1.00	.86	1.00	1.00

Abbreviations: OR, odds ratio. CI, confidence interval. EGFR, epidermal growth factor receptor. NCI, National Cancer Institute. CC, cancer center.

Distance to NCI CC was calculated using the longitude and latitude of each institution. This was a continuous variable measured in miles.

Significant at P<.05