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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