Table 1.
Participant mean demographic and fitness data by aerobic fitness group
| Variable | Lower-fit | Higher-fit |
|---|---|---|
| Participants | 30 (11 male) | 25 (14 male) |
| Age, years | 10.0 (0.6) | 10.0 (0.6) |
| VO2 max., ml/kg/min | 36.5 (3.9)* | 52.5 (4.8)* |
| K-BIT composite score (IQ) | 114.6 (14.9) | 114.4 (7.6) |
| K-BIT crystallized score (vocabulary) | 110.8 (11.7) | 109.4 (7.5) |
| K-BIT fluid score (matrices) | 115.4 (17.6) | 116.5 (9.2) |
| SES (median) | 2.8 (0.6) | 2.6 (0.6) |
| ADHD | 5.9 (3.8) | 7.1 (4.1) |
Figures in parentheses represent SD. K-BIT = Kaufman Brief Intelligence Test [Kaufman and Kaufman, 1990]; SES = socioeconomic status. SES was determined by the creation of a trichotomous index based on 3 variables: child participation in a free or reduced-price lunch program at school, the highest level of education obtained by the child's mother and father, and the number of parents who worked full-time [Birnbaum et al., 2002]. ADHD: scores on the ADHD Rating Scale V [DuPaul et al., 1998].
* p <0.001: significantly different.