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Table 1 Demographic and clinicopathologic variables of the training and validation sets

From: A novel nomogram based on cardia invasion and chemotherapy to predict postoperative overall survival of gastric cancer patients

Variable Training set (n = 4528) Validation set (n = 2015)
n % n %
Age (years)
 Median (range) 66 (55–75) 66 (56–74)
 < 70 2748 60.7 1226 60.8
 ≥ 70 1780 39.3 789 39.2
Sex
 Male 2741 60.5 1236 61.3
 Female 1787 39.5 779 38.7
Race
 White 2787 61.6 1156 57.4
 Black 568 12.5 263 13.1
 Other 1173 25.9 596 29.6
Location
 Cardia 1135 25.1 364 18.1
 Non-cardia 3393 74.9 1651 81.9
Grade (histology)
 Well 155 3.4 102 5.1
 Moderately 1106 24.4 483 24.0
 Poorly 3267 72.2 1430 71.0
AJCC 8th Stage
 I 1109 24.5 517 25.7
 II 1513 33.4 501 24.9
 III 1401 30.9 846 42.0
 IV 505 11.2 151 7.5
T stage
 T1 736 16.3 448 22.2
 T2 1676 37.0 251 12.5
 T3 1407 31.1 727 36.1
 T4 709 15.7 589 29.2
N stage
 N0 1274 28.1 717 35.6
 N1 1176 26.0 359 17.8
 N2 1054 23.3 353 17.5
 N3 1024 22.6 586 29.1
M stage
 M0 4023 88.8 1865 92.6
 M1 505 11.2 150 7.4
Tumor size (cm)
 < 2 476 10.5 328 16.3
 2–10 3620 79.9 1532 76.0
 ≥ 10/diffuse 432 9.5 155 7.7
Examined LNs (No.)
 Median (range) 23 (19-31) 24 (19-33)
Radiation
 No radiation or surgery 3029 66.9 1526 75.7
 Yes 1499 33.1 489 24.3
Chemotherapy
 No/unknown 2167 47.9 873 43.3
 Yes 2361 52.1 1142 56.7
  1. LN lymph node, AJCC American Joint Committee on Cancer