Table 1 Descriptive statistics on the study sample
|  | B-cohort (0–5 years) | K-cohort (4–9 years) |
|---|---|---|
Mean (SD) or % | Mean (SD) or % | |
Time use (Waves 1 to 3) | ||
Physical activity (hours/week) | ||
 Wave 1 | 8.04 (7.84) | 11.35 (6.87) |
 Wave 2 | 9.99 (7.04) | 10.47 (7.14) |
 Wave 3 | 9.53 (7.15) | 11.20 (8.13) |
Screen time (hours/week) | ||
 Wave 1 | 2.05 (3.19) | 11.71 (7.44) |
 Wave 2 | 8.78 (5.97) | 10.76 (7.18) |
 Wave 3 | 10.40 (7.04) | 13.25 (8.66) |
Child outcomes (Wave 3) | ||
Health-related quality-of-life (PedsQL) | ||
 Total score (0–100) | 82.48 (9.66) | 80.60 (11.81) |
 Physical health (0–100) | 84.78 (10.45) | 84.06 (13.76) |
 Social health (0–100) | 84.30 (14.20) | 80.00 (17.14) |
 Emotional health (0–100) | 74.62 (13.91) | 73.37 (15.54) |
Socio-emotional outcomes (SDQ) | ||
 Total score (0–40) | 7.92 (4.56) | 7.08 (5.10) |
 Hyperactivity (0–10) | 3.16 (2.04) | 3.05 (2.31) |
 Peer problems (0–10) | 1.33 (1.46) | 1.37 (1.60) |
 Conduct problems (0–10) | 2.05 (1.74) | 1.22 (1.40) |
 Emotional problems (0–10) | 1.38 (1.45) | 1.45 (1.66) |
Predictors/covariates (Wave 1) | ||
 Female, yes, % | 48.41 | 47.76 |
 Indigenous, yes, % | 2.61 | 2.13 |
 SEIFA (0–14) | 10.08 (0.80) | 10.10 (0.79) |
 Low birth weight, yes, % | 5.32 | 6.42 |
 Main caregiver mental health (0–5) | 4.44 (0.55) | 4.50 (4.43) |
 English as first language, yes, % | 92.32 | 90.79 |
 Siblings, yes, % | 22.18 | 38.33 |
 Two biological parents, yes, % | 92.94 | 87.42 |
 Parental income (AU$ per week) | 1,307.11 (1,029.13) | 1,387.06 (1,068.16) |