Table 1. CT Features in 150 lymph nodes.

CT imaging features	Lymph nodes (n)	Metastatic nodes (n)	Prevalence (%)	Non-metastatic nodes (n)	Prevalence (%)	χ2	P value
Size
4 mm≥D≤5 mm	17	7	41.18	10	58.82
5 mm<D≤10 mm	108	56	51.85	52	48.15	11.53	<0.01
D>10 mm	25	21	84.00	4	16.00
Shape
Round	97	48	49.48	49	50.52	4.73	0.03
Elliptical	53	36	67.92	17	32.08
Border
Well-defined	120	66	55.00	54	45.00	0.24	0.62
Ill-defined	30	18	60.00	12	40.00
Density†
Homogeneous	110	54	49.09	56	50.91	7.99	0.01
Heterogeneous	40	30	75.00	10	25.00
T staging
T3 staging	117	58	49.57	59	50.43	8.92	<0.01
T4 staging	33	26	78.79	7	21.21
Differentiation
Poorly	63	46	73.02	17	26.98	12.76	<0.01
Moderately	87	38	43.68	49	56.32

^†Density on the reconstructed 69-keV monochromatic images of the arterial phase. D, the maximal short-axis diameter.