. Author manuscript; available in PMC: 2015 Feb 16.

Published in final edited form as: Ann Surg Oncol. 2014 Sep 19;22(2):422–428. doi: 10.1245/s10434-014-4089-4

Table 1.

Patient pre-operative demographic information.

	Non-Surgeon Sonographer	Surgeon Sonographer	P-Value
N	129	48
Age (Years)	50 ± 1.4	49 ± 2.2	0.75
Female	92 (71%)	37 (77%)	0.57
Pre-Op Diagnosis			0.28
Benign	23 (18%)	11 (23%)
Indeterminate	43 (33%)	20 (42%)
Malignant	63 (49%)	17 (35%)
Documented Assessment of Cervical Lymph Nodes with US	26 (20%)	33 (69%)	<0.01

Data expressed as mean ± standard error of the mean, or number (percentage).