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Table 1 Descriptive statistics on the study sample

From: Joint physical-activity/screen-time trajectories during early childhood: socio-demographic predictors and consequences on health-related quality-of-life and socio-emotional outcomes

  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)
  1. LSAC data, Waves 1–3. PedsQl Pediatric Quality of Life inventory, SDQ Strengths and Difficulties Questionnaire, SEIFA Socio-Economic Index for Areas