Using the K-Nearest Neighbor Algorithm for the Classification of Lymph Node Metastasis in Gastric Cancer

Table 2

Univariate analyses of the features of gastric lymph node metastasis arterial phase.

No.	Feature	Mean ± Standard		𝑃1	𝑃2	𝑟pb	AUC	SU	IG
		Negative	Positive
1	40 keV	114.97±29.84	177.79±46.25	0.000	0.000	0.569	0.875	0.174	0.186
2	50 keV	85.55±18.81	123.69±30.44	0.000	0.000	0.540	0.869	0.174	0.186
3	60 keV	67.49±13.36	90.63±21.15	0.000	0.002	0.488	0.845	0.186	0.208
4	70 keV	56.74±11.53	68.93±15.63	0.000	0.025	0.362	0.774	0.106	0.104
5	80 keV	49.93±11.53	54.84±13.68	0.001	0.302	0.172	0.596	0.070	0.071
6	90 keV	45.30±12.05	45.27±13.55	0.025	0.994	−0.001	0.502	0.001	0.001
7	100 keV	42.01±12.18	39.08±13.46	0.114	0.537	−0.103	0.552	0.013	0.015
8	110 keV	39.71±12.37	34.68±13.54	0.272	0.295	−0.174	0.599	0.014	0.015
9	120 keV	38.13±12.56	31.62±13.68	0.434	0.182	−0.221	0.623	0.025	0.027
10	130 keV	36.83±12.73	29.25±13.86	0.570	0.127	−0.252	0.653	0.079	0.086
11	140 keV	35.89±12.86	27.41±14.00	0.673	0.092	−0.277	0.660	0.079	0.086
12	Effective-Z	8.18±0.26	8.71±0.35	0.000	0.000	0.601	0.896	0.317	0.336
13	Calcium-Iodine	819.69±10.39	810.02±10.70	0.284	0.015	−0.391	0.754	0.126	0.127
14	Calcium-Water	14.05±5.77	27.26±9.12	0.000	0.000	0.594	0.899	0.315	0.343
15	Iodine-Calcium	−579.62±8.65	−568.30±9.31	0.000	0.001	0.500	0.822	0.174	0.165
16	Iodine-Water	10.10±4.11	19.20±6.22	0.000	0.000	0.596	0.896	0.315	0.343
17	Water-Calcium	1021.57±15.74	1000.17±18.21	0.000	0.002	−0.494	0.818	0.174	0.165
18	Water-Iodine	1030.55±13.74	1017.24±15.20	0.291	0.017	−0.386	0.734	0.174	0.165