Table 1.

 Primary and secondary outcome measures for HopSCOTCH trial

	Time point		Measure	Additional information
	Baseline	Outcome
Primary outcome
Child body mass index z score	Yes	Yes	Portable rigid stadiometer (model IP0955, Invicta, Leicester, UK); measured. Calibrated digital scale (model ITHD646,Tanita, Toyko, Japan); measured	Height measured twice and average used; if values differed by >0.5 cm, third measurement taken and average of two closest values used. Weight, while wearing light clothing, measured once at baseline and twice at outcome. Average weight used at outcome; if values differed by ≥0.2 kg, third measure taken and average of two closest values used. Body mass index calculated as weight (kg)/(height (m)2); z score calculated according to US Centers for Disease Control reference values,30 using Stata “zanthro” function
Secondary outcomes
Waist circumference	Yes*	Yes	Lufkin Executive Steel Tape (W606PM); measured	Average of two waist measurements; if they differed by ≥1 cm, third measurement taken and mean of two closest used. Waist to height ratio calculated as waist circumference (cm)/height (cm)
Body fat (%)	Yes*	Yes	Tanita Digital Body Composition Monitor (BC-351)40; measured	Average of two body percentage fat measurements
Diet quality	No	Yes	4 day food diary; parent report	Parents reported child’s consumption of each of 17 food and drink items (0, 1, 2, >2 times) for two weekdays and two weekend days. Dichotomous (“yes,” “no”) variables derived for five “healthy behaviours” (high fruit, vegetables, and water; low fatty/sugary foods and non-diet sweet drinks) for each day. Number of healthy behaviours per day summed to give score between 0 and 5 (higher score indicates more healthy behaviour)
Physical activity	No	Yes	Actical Accelerometer (Mini Mitter); measured	Worn for 7 full days; ≥5 valid days required. Valid days had ≥10 hours of non-missing data between 6 am and 11 pm. Missing data were segments with ≥20 minutes of consecutive “0” counts, or counts >0 that were constant for ≥10 minutes. Outcomes across all valid days: mean activity counts/min and % time spent in moderate to vigorous physical activity
Health related quality of life (health status)	Yes	Yes	Paediatric quality of life inventory (PedsQL 4.0); self report and parent proxy versions41	Parent completed 23 item scale that yields total, physical summary, and psychosocial summary scores, each with possible range of 0-100 (100=best possible health); quantitative variable
Body dissatisfaction	No	Yes	Body figure perception questionnaire; self report42	Child picture scale of 1-7 (1=underweight, 7=obese) from which child picks perceived and ideal selves. “Perceived” minus “ideal” self yields discrepancy index, with positive and negatives scores representing desires to be thinner and fatter, respectively
Physical appearance and self worth	No	Yes	Modified from Harter’s perceived competence scale; self report	Six pairs of statements with binary response format; children choose statement from each pair that is closest to their competence. Each of six responses is then coded as being either “positive/better perception” or “negative/worse perception”. Six responses analysed as single outcome (% positive responses and population averaged odds ratio of positive response)
Parent body mass index	Yes	Yes	Height and weight measured (using stadiometer and scales described above) and self report	Baseline parent body mass index (weight (kg)/height (m)2) calculated from height and weight values reported by responding parent. Outcome parent body mass index calculated from measured height and weight when available, otherwise from values reported by responding parent

*Data collected only from intervention arm children at tertiary clinic appointment (“baseline”).