Baseline characteristics of participants by treatment group
| Control (n=87) | Intervention (n=87) | |
| Median (IQR) or n (%) | Median (IQR) or n (%) | |
| Age (years) | 15 (14–17) | 15 (13–17) |
| Female | 55 (63%) | 54 (62%) |
| Ethnicity | ||
| Black | 34 (41%) | 18 (22%) |
| Asian | 13 (16%) | 21 (25%) |
| White or mixed | 36 (43%) | 44 (53%) |
| Unknown | 4 (5%) | 4 (5%) |
| Anthropometry | ||
| BMI (kg/m2) | 32.0 (29.2–34.6) | 32.0 (28.7–35.5) |
| BMI z-score | 2.8 (2.4–3.3) | 2.8 (2.5–3.3) |
| Weight (kg) | 88.9 (80.0–100.4) | 84.4 (76.8–100.9) |
| Waist circumference (cm) | 99.0 (92.1–107.0) | 98.0 (90.6–108.7) |
| Estimated fat percentage | 44.1 (37.4–47.5) | 42.8 (39.0–49.0) |
| Psychological scales | ||
| EAT-26 | ||
| Eating attitude score (0–39) (n=173) | 11 (6–18) | 10 (6–17) |
| Dieting scale score (0–39) (n=173) | 7 (3–11) | 6.5 (3–12) |
| IWQOL-Kids | ||
| Participant-reported global score (0–100) (n=171) | 74 (62–84) | 77 (68–87) |
| Parent-reported global score (0–100) (n=156) | 74 (62–86) | 70 (56–81) |
| Rosenberg global score (0–30) (n=165) | 18 (15–20) | 18 (15–23) |
| Cardiometabolic risk factors | ||
| Blood glucose (mmol/L) (n=173) | 4.4 (4.2–4.6) | 4.5 (4.3–4.9) |
| Insulin (mmol/L) | 11.7 (8.2–18.9) | 14.2 (7.8–20.4) |
| LDL-C (mmol/L) (n=171) | 2.5 (2.1–3.3) | 2.7 (2.2–3.1) |
| HDL-C (mmol/L) (n=171) | 1.1 (1.0–1.3) | 1.1 (1.0–1.3) |
| Triglycerides (mmol/L) (n=173) | 1.0 (0.8–1.2) | 1.0 (0.7–1.4) |
All n’s are 174 except where stated.
Rosenberg scale—higher score means higher self.
BMI, body mass index; EAT-26, 26-Item Eating Attitudes Test; HDL-C, high-density lipoprotein cholesterol; IWQOL-Kids, Impact of Weight on Quality of Life-Kids; LDL-C, low-density lipoprotein cholesterol.