| D2 Test of attention | Symbol Digit Modalities Test | Academic achievement | Mathematics performance | ||||
---|---|---|---|---|---|---|---|---|
 |  | β |  | β |  | β |  | β |
Step A (R 2 ) | .12* | Â | .24* | Â | .23* | Â | .16* | Â |
Sex | Â | .07 | Â | .09 | Â | .26* | Â | .15* |
Ethnicity | Â | .04 | Â | .02 | Â | .06 | Â | .09 |
Academic year | Â | .31* | Â | .42* | Â | -.25* | Â | -.09 |
School level | Â | .18* | Â | .15* | Â | .15* | Â | .14* |
SES | Â | .02 | Â | -.12 | Â | .07 | Â | 0.8 |
BMI | Â | .03 | Â | .14* | Â | -.11 | Â | -.17* |
Depressive symptoms | Â | -.01 | Â | .09 | Â | -.15* | Â | -.20* |
Time spent moving per week corrected for active commuting to school | Â | .10 | Â | .15* | Â | -.06 | Â | .01 |
Step B (ΔR 2 ) | .00 |  | .00 |  | .00 |  | .01 |  |
Active commuting to school | Â | .05 | Â | .04 | Â | .04 | Â | .08 |
Step C (ΔR 2 ) | .02* |  | .00 |  | .00 |  | .00 |  |
Active commuting to school* Sex | Â | .13* | Â | .02 | Â | .00 | Â | .07 |