Table 1 Outcome variables of the JArDinS study

  Healthiness of household’s food supply

Household

Food supply diary

Share of major food groups, especially F&V in household supply; indicators of nutritional quality: Mean Adequacy Ratio (MAR), Mean Excess Ratio (MER)

  Physical activity: PAEE and total EE

Individual

Triaxial accelerometer (Actigraph)

Automatic activity-recognition (AAR) algorithm with an activity-specific count-based model

  Mental health

Individual

Online questionnaire

Warwick-Edinburgh Mental Well-being Scale (WEMWBS): 14 items on a 5-point Likert scale.

  Social health

Individual

Online questionnaire

UCLA Loneliness Scale (Version 3): 20 items on a 4-point Likert scale.

  Environmental impact of household’s food supply

Household

Food supply diary

GHGE (in g CO₂eq), atmospheric acidification (in g SO₂eq) and marine eutrophication (in g Neq)

  Environmental impact of household’s food trip

Household

Food supply diary

GHGE (in g CO₂eq) of food trip

  Sensitivity to food waste

Individual

Online questionnaire

Sensitivity to food waste scale: 8 items on a 7-point Likert scale

  Connection with nature

Individual

Online questionnaire

Nature Relatedness Scale: 21 items on a 5-point Likert scale

  Cost of food supply

Household

Food supply diary

Total food household food expenditure and share of each food group and subgroup

 Sociodemographic variables

Household Individual

Online questionnaire

Composition, income, perceived financial situation age, sex, education, employment of each member

 Away-from-home consumption

Individual

Online questionnaire

2 questions evaluating the frequency of away-from-home consumption, and food groups mainly consumed away from home.

 Experience in gardening

Individual

Online questionnaire

2 questions about previous experience in gardening and perceived competence. (ranked as ‘beginner’ ‘intermediate’ and ‘advanced’)