Prognostic assessment of different metastatic lymph node staging methods for gastric cancer after D2 resection

Table 3 Univariate analysis of various prognostic factors correlated to retrieved lymph nodes n (%)

Variable		5-yr survival rate	Log rankχ2value	P value
Examined lymph nodes
< 10	126 (29.5)	57.1%	4.256	0.039
10-15	152 (35.6)	55.9%
> 15	149 (34.9)	45.0%
pN
0	139 (32.6)	80.6%	97.014	0.000
1-2	78 (18.3)	57.7%
3-6	94 (22.0)	44.7%
7-15	86 (20.1)	27.9%
> 15	30 (7.0)	3.3%
MLR
Nr = 0	139 (32.6)	80.6%	103.984	0.000
0 < Nr ≤ 0.2	79 (18.5)	62.0%
0.2 < Nr ≤ 0.4	58 (13.6)	50.0%
0.4 < Nr ≤ 0.7	104 (24.4)	26.9%
0.7 < Nr ≤ 1	47 (11.0)	12.8%
LODDS
Nr < -1	129 (30.2)	80.6%	96.214	0.000
-1 ≤ Nr < -0.5	87 (20.4)	63.2%
-0.5 ≤ Nr < 0	85 (19.9)	43.5%
0 ≤ Nr < 0.5	76 (17.8)	27.6%
Nr ≥ 0.5	50 (11.7)	14.0%

MLR: Metastatic lymph node ratio; LODDS: Log odds of positive lymph nodes; pN: Positive lymph nodes.