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Demographic data of children with Down syndrome and controls.
| Variable | Down syndrome | Controls | P-value | |
|---|---|---|---|---|
| Number | 50 | 52 | ||
| Age (years) | 9.8 ± 3.8 | 7.6 ± 3.0 | 0.0016 | |
| Sex | Boys | 29 (58.0) | 23 (44.2) | 0.16 |
| Girls | 21 (42.0) | 27 (55.8) | ||
| Origin | White | 42 (84.0) | 45 (86.5) | 0.72 |
| Black | 8 (16.0) | 7 (13.5) | ||
