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 |