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Table 3 Stages of modified MP3 compared with the stages of DI (male)

From: A radiographic assessment of the correlation between the calcification stages of the mandibular second molar and the middle phalanx of the third finger of 9–16 years old children

DI MP3

D

E

F

G

H

Total

P Value

No.

%

No.

%

No.

%

No.

%

No.

%

No.

%

 

F

6

12.50%

1

2.08%

1

2.08%

1

2.08%

0

0.00%

9

18.75%

<0.001 (HS)

FG

1

2.08%

8

61.67%

3

6.25%

3

6.25%

0

0.00%

15

31.25%

G

0

0.00%

0

0.00%

1

2.08%

3

6.25%

0

0.00%

4

8.33%

H

0

0.00%

0

0.00%

0

0.00%

2

4.17%

0

0.00%

2

4.17%

HI

0

0.00%

0

0.00%

2

4.17%

6

12.50%

3

6.25%

11

22.92%

I

0

0.00%

2

4.17%

1

2.08%

2

4.17%

2

4.17%

7

14.58%

Total

7

14.58%

11

22.92%

8

16.67%

17

35.42%

5

10.42%

48

100.00%

 
  1. Chi-square: 48.490. DF: 20. The P value is 0.0004
  2. DI Demirjian’s Index, MP3 middle phalanx of the third finger