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Table 1 Baseline characteristics of the study sample

From: Assessing the sustained impact of a school-based obesity prevention program for adolescent boys: the ATLAS cluster randomized controlled trial

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)
  1. 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
  2. Abbreviations: BMI body mass index; SEP socio-economic position
  3. aOne participant did not report language spoken at home
  4. bTwo participants did not report cultural background
  5. 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