Table 1.
Baseline characteristics of the study sample
| Characteristics | Control (n = 180) | Intervention (n = 181) | Total (N = 361) |
|---|---|---|---|
| Age, mean (SD), y | 12.7 (0.5) | 12.7 (0.5) | 12.7 (0.5) |
| Born in Australia, n (%) | 168 (93.3) | 174 (96.1) | 341 (94.7) |
| English language spoken at home, n (%)a | 169 (94.4) | 175 (96.7) | 344 (95.6) |
| Cultural background, n (%)b | |||
| Australian | 132 (73.7) | 145 (80.6) | 277 (77.2) |
| European | 31 (17.3) | 22 (12.2) | 53 (14.8) |
| African | 6 (3.4) | 1 (0.6) | 7 (1.9) |
| Asian | 3 (1.7) | 4 (2.2) | 7 (1.9) |
| Middle eastern | 2 (1.1) | 0 (0) | 2 (0.6) |
| Other | 5 (2.8) | 8 (4.4) | 13 (3.6) |
| SEP, n (%)c | |||
| 1–2 | 55 (30.9) | 49 (27.1) | 104 (29.0) |
| 3–4 | 81 (45.5) | 120 (66.3) | 201 (56.0) |
| 5–6 | 27 (15.2) | 4 (2.2) | 31 (8.6) |
| 7–8 | 8 (4.5) | 8 (4.4) | 16 (4.5) |
| 9–10 | 7 (3.9) | 0 (0) | 7 (1.9) |
| Weight, kg | 53.1 (13.4) | 54.0 (15.0) | 53.5 (14.2) |
| Height, cm | 160.2 (8.4) | 160.9 (9.0) | 160.5 (8.7) |
| BMI, kg.m−2 | 20.5 (4.1) | 20.5 (4.1) | 20.5 (4.1) |
| Weight status, n (%) | |||
| Thinness | 5 (2.8) | 2 (1.1) | 7 (1.9) |
| Healthy weight | 115 (63.9) | 110 (60.8) | 225 (62.3) |
| Overweight | 38 (21.1) | 39 (21.5) | 77 (21.3) |
| Obese | 22 (12.2) | 30 (16.6) | 52 (14.4) |
| Waist circumference, cm | 76.5 (12.3) | 76.2 (12.2) | 76.3 (12.2) |
Weight status was determined using the World Health Organization criteria [38]: Thinness < -2SD, Overweight: > +1SD, Obesity: > +2SD for age and sex-adjusted BMI z-scores
Abbreviations: BMI body mass index; SEP socio-economic position
aOne participant did not report language spoken at home
bTwo participants did not report cultural background
cSocioeconomic position determined by population decile using Socio-Economic Indexes For Areas Index of Relative Socioeconomic Disadvantage based on residential postcode (1 = lowest, 10 = highest). Two participants did not report residential postcode