Table 1.
Self-report measures | Measure characteristics |
---|---|
aSocio-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 |
cEating 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 |
dOther 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. |
abaseline only; b6 month follow-up only; c6 and 12 month follow-up; d12 month follow-up only.