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Table 1 Demographic and Clinicopathologic Variables of the Adjuvant Chemotherapy and Non- Adjuvant Chemotherapy Cohorts in SEER datebase

From: Indications for adjuvant chemotherapy in patients with AJCC stage IIa T3N0M0 and T1N2M0 gastric cancer—an east and west multicenter study

VariableGroup C(n = 287)Group N(n = 1306) 
No. of Patients%No. of Patients%χ2test P
Sex
 Female9633.452640.3.033
 Male19166.678059.7
Age y
 ≤6515253.030923.7.000
 >6513547.099776.3
AJCC
 T1N23512.21239.4.157
 T3N025287.8118390.6
LNs dissection,No.
 ≤1514051.227020.7.000
 >1514748.8103679.3
Size,mm
 <204214.666951.2.000
 ≥2024585.463748.8
Intestinal type
 No24786.1107081.9.102
 Yes4013.923618.1
Primary Site
 Upper third13145.665750.3.359
 Middle4716.419413.9
 Lower third10938.045534.8
Gastrectomy Type
 Antrectomy227.7624.7.118
 Distal gastrectomy10837.654441.7
 Upper gastrectomy279.41027.8
 Total gastrectomy13045.359845.8
Grade
 Well differentiated72.4695.3.102
 Moderately differentiated7927.549638 
 Poorly differentiated19266.971754.9 
 Undifferentiated93.1241.8 
Histology
 Adenocarcinoma22277.4112586.1.000
 Non-Adenocarcinoma6522.618113.9 
Follow-up,month
 Median2734 
 Range0-2970-308 
  1. Group C: Adjuvant Chemotherapy Cohort; Group N: non- Adjuvant Chemotherapy Cohort. Abbreviations: LN Lymph node, No. Number, NOS Not otherwise specified, AJCC American Joint Committee on Cancer, Gx Grade could not be evaluated