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Table 1 Self-report measures evaluated as potential secondary outcomes

From: Randomised controlled feasibility trial of a web-based weight management intervention with nurse support for obese patients in primary care

Self-report measures

Measure characteristics

a Socio-demographic questions

Age, gender, years of education

aTreatment Self-Regulation Questionnaire[26]

12 items comprising three validated sub-scales assessing three dimensions of motivation to use the POWeR intervention (Controlled-External, Controlled-Introjection and Autonomous-Identification + Integration)

Food Frequency Questionnaire

Participants report how often they eat 40 food types in a typical day and week. Developed from a validated measure [27].

Godin Leisure Time Physical Activity Questionnaire[28]

4 items assessing time spent on mild, moderate and strenuous activities during the past week

EQ-5D (Euroqol)[29]

5 items assessing general health-related quality of life, used to generate Quality Adjusted Life Years for cost-effectiveness analyses.

Theory of Planned Behaviour questions

10 items, comprising 2 items assessing each of the Theory of Planned Behaviour [30] constructs (attitude, subjective norms, perceived behavioural control, and intention) completed twice to assess attitudes relating to using the POWeR eating plan and the POWeR physical activity plan

bTherapist perceptions scale[31]

5 items assessing perceptions of the nurse support provider

c Eating plan acceptability

7 items asking about the acceptability of the eating plan in terms of satiety, taste, cost and difficulty preparing or obtaining foods

cPETS Adherence Questionnaire[32]

14 items assessing socially acceptable reasons for non-adherence, followed by 3 items asking how much of the time participants had followed the low calorie eating plan, the low carbohydrate eating plan and the physical activity plan

d Other weight loss support

8 items asking about use of other interventions during the past year

dPatient Enablement Instrument[33]

6 items assessing perceived ability to cope with weight problem and general health as a result of health care in the past year.

  1. abaseline only; b6 month follow-up only; c6 and 12 month follow-up; d12 month follow-up only.