Table 1.

Outcome measures

Primary outcomes		Baseline	12 weeks	12 months
Body weight	Measured using digital body weight scales (kg)	X		X
Physical activity	7 days accelerometry with activPAL (steps)	X		X

Secondary outcomes
Modes of physical activity	Scottish Physical Activity Screening Questionnaire34	X	X	X
Sedentary behaviour	7 days accelerometry with activPAL (subsample only)	X		X
Anthropometric changes	Body mass index (height and weight), waist circumference (cm)	X		X
Eating habits	Questionnaire based on Scottish Health Survey22	X		X
	Fruit and vegetable intake39		X
Alcohol intake	Audit C questionnaire40	X		X
Psychosocial variables	Modified brief illness questionnaire41	X		X
	Knowledge and beliefs about lifestyle and breast cancer risk (developed in-house)	X		X
	Psychosocial health measures resources (perceived motivation, awareness, ability, action, monitoring, and social support around weight management)			X
	Perceived body weight (developed in-house)	X	X	X
Economic outcomes	EQ-5D-5L questionnaire42	X	X	X
	Economic health resource usage (developed by HERU, University of Aberdeen)	X		X
Cardiovascular risk	Blood sampling for lipids	X		X
	Blood pressure	X		X
Diabetes risk	Haemoglobin A1c	X		X