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Table 2 Summary of study measures

From: Supermarket Healthy Eating for Life (SHELf): protocol of a randomised controlled trial promoting healthy food and beverage consumption through price reduction and skill-building strategies

Measures

Baseline

Post-intervention

Follow-up

Outcomes

   

   Vegetable purchasing and consumption

✓

✓

✓

   Fruit purchasing and consumption

✓

✓

✓

   Water purchasing and consumption

✓

✓

✓

   Sugar sweetened beverage purchasing and consumption

✓

✓

✓

   Shopping habits (location, frequency)

✓

✓

✓

Mediators

   

   Food security

✓

✓

✓

   Self-efficacy for planning, shopping, preparing and eating fruit and vegetables

✓

✓

✓

   Self-efficacy for drinking water and reducing sugar sweetened beverages

✓

✓

✓

   Perceived affordability of fruit and vegetables

✓

✓

✓

   Convenience

✓

✓

✓

   Personal and household preferences

✓

✓

✓

Demographic and other covariates

   

   Age

✓

✓

✓

   Height

✓

✓

✓

   Weight

✓

✓

✓

   Country of birth

✓

-

-

   Relationship status

✓

-

-

   Healthcare card holder

✓

-

-

   Household composition

✓

-

-

   Income (individual & household)

✓

-

-

   Educational qualifications

✓

-

-

   Employment status

✓

-

-

   Whether currently pregnant

✓

✓

✓

   Whether currently dieting

✓

✓

✓

   Vegetarian status

✓

-

-

   Smoking status

✓

-

-

Economic evaluation questions

✓

✓

✓

Process evaluation questions

-

✓

✓