Table 1 AFLY5 outcomes and mediators

Primary outcomes

Accelerometer assessed mean time per day spent doing moderate/vigorous physical activity (MVPA)

Continuous

Minutes

Accelerometer assessed mean time per day spent in sedentary activity

Continuous

Minutes

Self-reported (validated questionnaire) consumption of servings of fruit and vegetables

Count

Servings

Will be treated as a continuous variable

Secondary outcomes

Self-reported (validated questionnaire) mean time spent screen-viewing on a week day

Continuous

Minutes

Self-reported (validated questionnaire) mean time spent screen-viewing on a Saturday

Continuous

Minutes

Self-reported (validated questionnaire) consumption of servings of snacks

Count

Servings

Will be treated as a continuous variable

Self-reported (validated questionnaire) consumption of servings of high fat food

Count

Servings

Will be treated as a continuous variable

Self-reported (validated questionnaire) consumption of servings of high energy drinks

Count

Servings

Will be treated as a continuous variable

Body mass index (BMI)

Continuous

z(SD)-score

Age and gender standardised

Waist circumference (WC)

Continuous

z(SD)-score

Age and gender standardised

General overweight/obesity

Binary

No

Derived from BMI using IOTF thresholds

Yes

Central overweight/obesity

Binary

No

Derived from WC using IDF criteria

Yes

Potential mediators to be explored in secondary analyses

Self-reported (validated questionnaire) physical activity self-efficacy

Score in whole numbers

Range 26-130

Will be treated as a continuous variable

Self-reported (validated questionnaire) fruit and veg consumption self-efficacy

Score in whole numbers

Range 21-105

Will be treated as continuous variable

Child-reported (validated questionnaire) perceived maternal logistic support for physical activity

Score in whole numbers

Range 3-12

Will be treated as continuous variable

Child-reported (validated questionnaire) perceived paternal logistic support for physical activity

Score in whole numbers

Range 3-12

Will be treated as continuous variable

Child-reported (validated questionnaire) perceived maternal modelling of physical activity

Score in whole numbers

Range 5-20

Will be treated as a continuous variable

Child-reported (validated questionnaire) perceived paternal modelling of physical activity

Score in whole numbers

Range 5-20

Will be treated as a continuous variable

Child-reported (validated questionnaire) perceived maternal limitation of sedentary behaviour*

Score in whole numbers

Range 4-16

Will be treated as a continuous variable

Child-reported (validated questionnaire) perceived paternal limitation of sedentary behaviour*

Score in whole numbers

Range 4-16

Will be treated as a continuous variable

Child-reported (validated questionnaire) perceived parental modelling for healthy eating fruit and vegetable consumption^$

Score in whole numbers

Range 12-48

Will be treated as a continuous variable

Child’s knowledge test related to intervention

Score in whole numbers

Range 0-9

Will be treated as a continuous variable