Table 2:

Parameters of tissue attenuation between benign and metastatic lymph nodes among 3 protocols^{^a}

Variables	Protocol A			Protocol B			Protocol C
Variables	Metastatic (n = 55)	Benign (n = 55)	P Value	Metastatic (n = 67)	Benign (n = 48)	P Value	Metastatic (n = 55)	Benign (n = 47)	P Value
LNTA
Reader 1	107.2 ± 28.6	87.1 ± 25.7	<.0001	109.1 ± 40.2	79.68 ± 39.8	<.0001	136.3 ± 41.6	72.49 ± 44.5	<.0001
Reader 2	109.8 ± 27.5	94.0 ± 27.4	.03	123.7 ± 39.8	84.72 ± 37.9	<.0001	133.2 ± 43.8	83 ± 38.0	<.0001
Normalized LNTA to CCA
Reader 1	0.63 ± 0.23	0.49 ± 0.13	<.0001	0.33 ± 0.14	0.25 ± 0.08	<.0001	0.47 ± 0.16	0.26 ± 0.05	<.0001
Reader 2	0.64 ± 0.20	0.52 ± 0.12	.008	0.35 ± 0.12	0.28 ± 0.12	<.0001	0.47 ± 0.15	0.29 ± 0.14	<.0001
Normalized LNTA to IJV
Reader 1	0.58 ± 0.15	0.46 ± 0.13	.0001	0.38 ± 0.18	0.28 ± 0.09	<.0001	0.59 ± 0.26	0.33 ± 0.17	<.0001
Reader 2	0.60 ± 0.20	0.55 ± 0.12	.009	0.43 ± 0.16	0.30 ± 0.15	<.0001	0.60 ± 0.25	0.37 ± 0.24	<.0001
Normalized LNTA to paraspinal muscle
Reader 1	1.51 ± 0.41	1.20 ± 0.34	<.0001	1.76 ± 0.84	1.26 ± 0.31	<.0001	2.04 ± 0.92	1.13 ± 0.25	<.0001
Reader 2	1.51 ± 0.41	1.36 ± 0.29	.019	2.03 ± 0.66	1.40 ± 0.36	<.0001	2.05 ± 0.72	1.28 ± 0.49	<.0001