Table I.
Demographics for treatment and control group.
| Age at T1, y | Age at T2, y | T1-T2 interval, y | ||||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | |
| Treated group | 9.9 | 1.3 | 11.7 | 1.9 | 1.8 | 1.1 |
| Control group | 10.1 | 1.1 | 12.0 | 0.3 | 1.9 | 0.8 |
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