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Table 1 Six patterns for joint effect of gene pairs in binary-class simulation data

From: Informative gene selection and the direct classification of tumors based on relative simplicity

Class

Pattern I

Pattern II

Pattern III

Pattern IV

Pattern V

Pattern VI

G1

G2

G3

G4

G5

G6

G7

G8

G9

G10

G11

G12

+

50

100

5

100

50

50

5

50

50

100

50

50

+

50

100

5

100

50

50

5

50

5

10

100

100

+

50

100

5

100

50

50

5

50

50

100

50

50

+

50

100

5

100

50

50

5

50

5

10

100

100

-

100

50

10

50

100

100

10

100

100

50

50

100

-

100

50

10

50

100

100

10

100

10

5

100

50

-

100

50

10

50

100

100

10

100

100

50

50

100

-

100

50

10

50

100

100

10

100

10

5

100

50

Background difference between gene pairs

Not exist

Exist

Not exist

Exist

Not exist

Not exist

Background difference among samples

Not exist

Not exist

Not exist

Not exist

Exist

Not exist

Vertical comparison

of individual-gene

 

G1 < 75

G1 > 75

G2 < 75

G2 > 75

G3 < 7

G3 > 7

G4 < 75

G4 > 75

G5 < 75

G5 > 75

G6 < 75

G6 > 75

G7 < 7

G7 > 7

G8 < 75

G8 > 75

G9 < 41

G9 > 41

G10 < 41

G10 > 41

G11 < 75

G11 > 75

G12 < 75

G12 > 75

+

4

0

0

4

4

0

0

04

4

0

4

0

4

0

4

0

2

2

2

2

2

2

2

2

-

0

4

4

0

0

4

4

0

0

4

0

4

0

4

0

4

2

2

2

2

2

2

2

2

Highlight

Yes (χ 2 = 4.5*)

Yes (χ 2 = 4.5*)

Yes (χ 2 = 4.5*)

Yes (χ 2 = 4.5*)

Yes (χ 2 = 4.5*)

Yes (χ 2 = 4.5*)

Yes (χ 2 = 4.5*)

Yes (χ 2 = 4.5*)

No (χ 2 = 0.5)

No (χ 2 = 0.5)

No (χ 2 = 0.5)

No (χ 2 = 0.5)

Horizontal comparison of pair-wise genes

 

G1 > G2

G1 < G2

G3 > G4

G3 < G4

G5 > G6

G5 < G6

G7 > G8

G7 < G8

G9 > G10

G9 < G10

G11 > G12

G11 < G12

+

0

4

0

4

2

2

0

4

0

4

2

2

-

4

0

0

4

2

2

0

4

4

0

2

2

Highlight

Yes (χ 2 = 4.5*)

No (χ 2 = 0)

No (χ 2 = 0.5)

No (χ 2 = 0)

Yes (χ 2 = 4.5*)

No (χ 2 = 0.5)

Vertical comparison of pair-wise genes

 

G1 < 75 & G2 < 75

G1 < 75 &G2 > 75

G1 > 75 & G2 < 75

G1 > 75 &G2 > 75

G3 < 7 & G4 < 75

G3 < 7 & G4 > 75

G3 > 7 & G4 < 75

G3 > 7 & G4 > 75

G5 < 75 & G6 < 75

G5 < 75 & G6 > 75

G5 > 75 & G6 < 75

G5 > 75 & G6 > 75

G7 < 7 & G8 < 75

G7 < 7 & G8 > 75

G7 > 7 & G8 < 75

G7 > 7 & G8 > 75

G9 < 41 & G10 < 41

G9 < 41 & G10 > 41

G9 > 41 & G10 < 41

G9 > 41 & G10 > 41

G11 < 75 & G12 < 75

G11 < 75 & G12 > 75

G11 > 75 & G12 < 75

G11 > 75 & G12 > 75

+

0

4

0

0

0

4

0

0

4

0

0

0

0

4

0

0

2

0

0

2

2

0

0

2

-

0

0

4

0

0

0

4

0

0

0

0

4

0

0

0

4

2

0

0

2

0

2

2

0

Highlight

Yes (χ 2 = 4.5*)

Yes (χ 2 = 4.5*)

Yes (χ 2 = 4.5*)

Yes (χ 2 = 4.5*)

No (χ 2 = 0.5)

Yes ((χ 2 = 8*)

  1. Values in parenthesis are chi-square values, * denote p < 0.05