Electronic supplementary material
Recruitment of primary care clinics
Recruitment of participants
Eligibility and screening
Randomization and blinding
Group 1: referral for face-to-face physical activity counseling
Group 2: referral for face-to-face and telephone physical activity counseling
Group 3: usual care
Intervention fidelity and process evaluation
Demographic and secondary outcomes
Self-reported physical activity
Quality of life
Potential mediators of physical activity
Goals and intentions – Behavioral goal was measured with one item which asked “How likely is it that you will do ‘regular physical activity’ within the next 3 months?” on a scale from 0-100% . To assess action planning, four items were designed to measure plans made in relation to regular physical activity, with a five point Likert-type scale from 1 ‘Not at all’ to 5 ‘Very much’. These four questions have internal reliability ranging from 0.92 to 0.95 .
Outcome expectations – Ten items were used to measure outcome expectations, on a five point Likert scale from 1 ‘ Strongly disagree’ to 5 ‘Strongly agree’. Five measured positive outcome expectations and five measured negative outcome expectations . With Cronbach alphas of 0.79 for the positive scale, and 0.71 for the negative scale, these measures have adequate validity and reliability for use in a general adult population .
Perceived environmental local surroundings – Nine items were used to assess the local suburb’s physical surroundings (1. Greenery; 2. Interesting things to look at; 3. Pleasant natural features; 4. Footpaths on most streets; 5. Footpaths that are well-lit at night; 6. Lots of traffic; 7. Live near busy road; 8. Unsecured dogs; 9. Feel safe walking home at night) . The reliability of these nine items has been reported as moderate to substantial, with individual item ICCs ranging from 0.51 to 0.74 .