Table 1.

Indicators of primary outcomes assessed pre-intervention^a

Age group	Outcome	Indicator	Measurement tool
Adults	Healthy eating*	Binary: consumption of five or more portions of fruit and vegetables per day (‘five-a-day’)	Food frequency questionnaire
Adults	Healthy physical activity*	Binary: doing five or more sessions of moderate intensity physical activity per week lasting at least 30 min (‘five-a-week’)	International Physical Activity Questionnaire
Adults	Mental wellbeing - positive	Continuous: Hope Scale score	Hope Scale
Adults	Mental wellbeing - negative	Binary: reports feeling anxious or depressed	EQ5D (1 item)
Adults	Mental wellbeing - negative	Binary: reports visiting GP for anxiety or depression or other emotional problem	Individual questionnaire item
Adolescents	Healthy eating - positive	Binary: frequent consumption of fruit	Individual questionnaire item
Adolescents	Healthy eating negative	Continuous: score summarizing frequency of consumption of chips, sweets or chocolate, and s ugar sweetened soft drinksb	Individual questionnaire items
Adolescents	Healthy physical activity*	Continuous: IPAQ score	Physical Activity Questionnaire for Adolescents
Adolescents	Mental health - negative*	Binary: score above threshold for normal mental health	Strengths and Difficulties Questionnaire
Adolescents	Mental health - positive wellbeing*	Continuous: positive affect score and negative affect score	Positive and negative affect scale

^aOnly those outcomes marked with an asterisk will be primary trial outcomes at follow-up. Mental wellbeing in adults will be assessed using the GHQ12 [67] and the Warwick-Edinburgh Mental Wellbeing Scale [68,69].

^bRespondents completed a Likert scale to indicate the frequency of consuming these items; the overall unhealthy eating score was calculated as the mean response across the three items (scores: 1, ‘hardly ever’; 2, ‘once or twice a week’; 3, ‘3-4 times a week’; 4, ‘almost every day’; 5, ‘every day without exception’.