Thirty-three determinants were measured in relation to the guideline, the health professional, the organisational context and the socio-political context.
Cognitive behavioral determinants were measured using variables that represent the I-Change Model [ 69- 71].
A limitation is some of the determinants were measured by surgical record search.
All determinants were measured in duplicate blind to cigarette and gender status.
Behavioral determinants were measured for each behavior, fruit and vegetable consumption separately, and included stages of change [ 103, 104], attitudes [ 30], social influence [ 30], self-efficacy expectations [ 105], ability factors (i.e., action plans) [ 106], habit [ 107], and awareness based on self-rated behavior and the assessment of behavior by questionnaire [ 108, 109].
The determinants were measured for each behavior, fruit and vegetables separately, using variables from the I-Change Model [ 54– 56] and the Transtheoretical Model [ 60], with meeting the guideline as the target behavior: awareness, pros and cons, social support, modeling self-efficacy expectations, action plans, habit strength, and stages of change.
The influence of the behavior determinants was measured in question 6.
These behavioural determinants are measured and considered during the sessions of the PREPASE intervention program.
Cross-sectional studies are weak in providing causation as they are subject to difficulties in interpreting the temporal sequence of events since health status and determinants are measured simultaneously.
The determinant variables were measured with the same instruments in all cohorts.
Determinants of adherence were measured using quantitative methods (questionnaires).
