Table 4

Dietary social-cognitive mediator scales

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


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.

Lubans et al. BMC Public Health 2010 10:652   doi:10.1186/1471-2458-10-652

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