Table 1.

Participants characteristics per age-group.

	Age group 1	Age group 2
Group demographics
N	80	72
Age (mean (SD)a	9.6 (0.6)	11.5 (0.5)
Age-range (min-max)a	8.6–10.7	10.7–12.7
Sex distribution (N boys/N girls)	40/40	36/36
LPE (N low-moderate/N high)	36/44	31/41
Mean (SD) LPEb	6.4 (1.4)	6.5 (1.3)

^aAge in years; ^bLPE was measured on a 9-point scale, ranging from 0 = no finished education to 9 = post university education.