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Mean (SD) Age of Participants at Each Year of the Study
| Participant Group |
||||
|---|---|---|---|---|
| Grade | TA (n = 93) | LA (n = 18) | MLD (n = 11) | Total (n = 122) |
| 4 | 9.59 (0.31) | 9.92 (0.32) | 9.80 (0.22) | 9.66 (0.32) |
| 5 | 10.61 (0.28) | 10.96 (0.28) | 10.96 (0.27) | 10.70 (0.32) |
| 6 | 11.76 (0.28) | 12.06 (0.30) | 12.05 (0.26) | 11.83 (0.31) |
| 7 | 12.79 (0.29) | 13.09 (0.31) | 13.00 (0.33) | 12.85 (0.32) |
| 8 | 13.74 (0.31) | 14.03 (0.33) | 13.97 (0.31) | 13.80 (0.33) |
