Methods of measurement

(−)

(0)

(+)

Total

n

%

n

%

n

%

n

%

2f

1

2.5

20

50

19

47.5

40

100

Mf

3

7.5

19

47.5

18

45

40

100

Radiograph

11

2.5

2

5

37

92.5

40

100