Minimum
Maximum
Mean
SD
Age (years)
11
51
20
10.52
ERR T
2
(%)
0.0
10.7
2.1
2.38
ERR T
3
(%)
0.0
12.1
3.5
3.03
Table 1:
Descriptive statistics of the sample (n=47) in relation to age and ERR (%) after six (T
2
) and 12 (T
3
) months of treatment on 91 upper central incisors.