Table 1 Behavioural change techniques used in the intervention based on CAL-ORE taxonomy[23]

Prompt self-monitoring of behavioural outcome

Participants were instructed to weigh themselves daily and record it on the weight record card provided.

Prompt review of outcome goals

Participants were instructed to work out their average weight for the week and review their progress against losing 0.5 kg per week.

Provide information on the consequences of behaviour in general

The benefits of self-weighing for weight loss were discussed with participants.

Environmental restructuring

Participants were asked to put the scales in a place that would help them remember to weigh themselves.

Provide information on where and when to perform the behaviour

Participants were asked to weigh themselves at the same time each day.

Use follow-up prompts

Participants were sent text messages once per week at a time which would help participants to remember to weigh themselves.

Barrier identification/Problem solving

At visit two participants were asked if there were any barriers to self-weighing and discussed how to overcome these barriers.

Provide information about behaviour health link

The consequences of an unhealthy weight were discussed.

Provided general encouragement

Praised participants in week two for making changes to their diet and activity.

Goal setting (outcome)

Participants were instructed to lose 0.5 kg per week.

Prompt self-monitoring of behaviour

Participants were asked to complete a 4 day food diary.