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Table 2 Cut-point analysis to determine which cutoff value provided the most statistically significant difference in survival among patients with N3 gastric cancer

From: A modified subclassification to evaluate the survival of patients with N3 gastric cancer: an international database study

Cutoff value Number of patients 5-year overall survival (%) χ2b P valueb
≤ 7 vs > 7 215 vs 2538 35.8 vs 21.2 28.902 7.61 × 10−8
≤ 8 vs > 8 436 vs 2317 35.3 vs 19.9 63.197 1.87 × 10−15
≤ 9 vs > 9 646 vs 2107 34.0 vs 18.8 86.210 1.62 × 10−20
≤ 10 vs > 10 846 vs 1907 34.1 vs 17.1 127.873 1.20 × 10−29
≤ 11 vs > 11 1011 vs 1742 32.4 vs 16.5 128.609 8.26 × 10−30
≤ 12 vs > 12 1172 vs 1581 31.0 vs 16.0 138.384 6.01 × 10−32
≤ 13 vs > 13 1333 vs 1420 30.7 vs 14.5 157.671a 3.65 × 10−36
≤ 14 vs > 14 1501 vs 1252 29.2 vs 14.1 148.822 3.13 × 10−34
≤ 15 vs > 15 1647 vs 1106 28.3 vs 13.5 143.757 4.02 × 10−33
≤ 16 vs > 16 1797 vs 956 27.2 vs 13.2 124.495 6.57 × 10−29
≤ 17 vs > 17 1898 vs 855 26.3 vs 13.5 111.424 4.78 × 10−26
≤ 18 vs > 18 1996 vs 757 25.9 vs 12.8 109.305 1.39 × 10−25
≤ 19 vs > 19 2083 vs 670 25.6 vs 12.2 103.929 2.10 × 10−24
≤ 20 vs > 20 2165 vs 588 25.0 vs 12.5 83.056 7.97 × 10−20
  1. aCorresponds to the cut point with the largest χ2 statistic
  2. bLog rank test