S3.

Stage migration of pN stage in different ELN count in all 7,620 GC patients by using univariate survival analysis

ELN count	n	pN0			pN1			pN2			pN3a			pN3b
		χ2	P		χ2	P		χ2	P		χ2	P		χ2	P
ELN, examined lymph nodes; GC, gastric cancer. The eighth edition of TNM classification for GC was adopted for postoperatively pathological stages of all included patients.
<16
pN0	1,031
pN1	495	121.562	<0.001
pN2	522	273.329	<0.001		20.801	<0.001
pN3a	244	473.813	<0.001		117.991	<0.001		49.616	<0.001		−
pN3b	−	−			−			−			−			−	−
16−30
pN0	1,203
pN1	613	104.777	<0.001
pN2	646	314.039	<0.001		32.409	<0.001
pN3a	762	720.338	<0.001		166.551	<0.001		58.686	<0.001
pN3b	258	930.922	<0.001		283.744	<0.001		163.020	<0.001		45.069	<0.001		−	−
>30
pN0	559
pN1	256	19.348	<0.001
pN2	319	46.828	<0.001		2.879	0.090
pN3a	332	201.424	<0.001		51.863	<0.001		36.004	<0.001
pN3b	380	462.036	<0.001		159.319	<0.001		147.778	<0.001		42.406	<0.001		−	−