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Table 1 Comparison between DI and modified MP3 (both gender)

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

MP3

DI

P value

D

E

F

G

H

Total

F

8

1

2

1

0

12

<0.0001 (HS)

FG

2

15

11

13

0

41

G

1

0

2

7

0

10

H

0

0

0

2

0

2

HI

0

0

3

12

4

19

I

0

3

4

4

5

16

Total

11

19

22

39

9

100

 
  1. Chi Square: 83.200. DF: 20. P value is <0.0001
  2. DI Demirjian’s Index, MP3 middle phalanx of the third finger