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Table 2 Stages of modified MP3 compared with the stages of DI (female)

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

D

E

F

G

H

Total

P value

MP3

No.

%

No.

%

No.

%

No.

%

No.

%

No.

%

F

2

3.85%

0

0.00%

1

1.92%

0

0.00%

0

0.00%

3

5.77%

0.001 (HS)

FG

1

1.92%

7

13.46%

8

15.38%

10

19.23%

0

0.00%

26

50.00%

G

1

1.92%

0

0.00%

1

1.92%

4

7.69%

0

0.00%

6

11.54%

HI

0

0.00%

0

0.00%

1

1.92%

6

11.54%

1

1.92%

8

15.38%

I

0

0.00%

1

1.92%

3

5.77%

2

3.85%

3

5.77%

9

17.31%

Total

4

7.69%

8

15.38%

14

26.92%

22

42.31%

4

7.69%

52

100.00%

 
  1. Chi-square: 37.857. DF: 16. The P value is 0.0016
  2. DI Demirjian’s Index, MP3 middle phalanx of the third finger