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Table 4 Dietary social-cognitive mediator scales

From: The Nutrition and Enjoyable Activity for Teen Girls (NEAT girls) randomized controlled trial for adolescent girls from disadvantaged secondary schools: rationale, study protocol, and baseline results

Variables Description and example items Range
(No. of items)
ICC (95% CI) α χ2 df p GFI RMSEA
Dietary mediators          
Self-efficacy Confidence in ability to adopt, maintain and overcome barriers to healthy eating behaviors. For example: "I find it easy to choose a healthy snack when I eat between meals - e.g. fruit, reduced fat yoghurt". 6 0.89
(0.85 to 0.92)
0.70 17.41 9 0.04 0.97 0.07
Environmental perceptions An individual's mental representation of their environment that may influence their dietary behaviors. For example: "At home, fruit is always available to eat - e.g. fresh, canned or dried". 4 0.81
(0.75 to 0.86)
0.79 0.90 2 0.64 1.00 0.00
Social support Social influences that reinforce healthy eating through encouragement and role modeling. For example: "...how often do your parents prepare a healthy home-cooked dinner for you?" 6 0.89
(0.85 to 0.92)
0.68 10.24 9 0.33 0.98 0.03
Behavioral strategies Self-reinforcement for healthy eating achieved through setting goals, monitoring behavior and self-reward. For example: "During meals do you leave food on your plate once you feel full?" 6 0.88
(0.84 to 0.91)
0.75 6.69 9 0.67 0.99 0.00
Outcome expectations Anticipated outcomes of healthy eating such as the benefits. For example: "Healthy eating can help me to control my weight". 5 0.84
(0.79 to 0.88)
0.72 14.67 5 0.01 0.97 0.10
Outcome expectancies The value placed on anticipated outcomes of healthy eating. For example: "How important is controlling your weight to you?" 5 0.89
(0.87 to 0.92)
0.65 4.10 5 0.54 0.99 0.00
Intentions Intention to eat healthily. For example: "... do you intend to choose reduced-fat foods and drinks whenever you have a choice?" 6 0.83
(0.77 to 0.87)
0.71 9.77 5 0.08 0.98 0.08
  1. Note. PA = physical activity; ICC = Intra class correlation for 2-week test-retest reliability; α = Cronbach alpha from the study sample; χ2 = Chi-square; df = degrees of freedom; p = probability; GFI = goodness of fit index; RMSEA = root mean square of approximation.