Grade 0

Grade 1

Grade 2

Grade 3

Subtotal

Average

p

BD

C

BD

C

BD

C

BD

C

BD

C

BD

C

LS

0

0

6

18

21

13

6

2

33

33

1.9

1.52

<0.05

LI

0

0

8

16

16

10

11

6

32

32

2.1

1.69

<0.05

RS

0

0

8

16

16

13

11

4

33

33

1.9

1.63

<0.05

RI

0

0

11

23

17

11

11

1

35

35

1.7

1.37

<0.05

Σ

0

0

33

76

47

47

32

13

137

136

2

1.44