Table 3: Reliability ( ) demonstrated by intraclass correlation coefficient (ICC) and 95% confidence intervals (CI) for the parent outcomes and internal consistency for the parent scores.

ScoreReliability dataMedian (interquartile range)Target score/response
ICC95% CICronbach’s alpha Time 1Time 2

Food availability
Sweet beverages0.86**0.76–0.910.6013 (10–15)12.5 (10–15)≥12 (less than weekly each item)
Non-core foods0.81**0.7–0.890.7820 (17–23)20 (17–23)≥21 (less than weekly each item)
Fruit and vegetables0.61**0.42–0.750.1313 (12–14)13 (12–14)≥12 (weekly or more often each item)

Healthy eating
Healthy attitudes0.55**0.34–0.700.3522 (19–24)22 (20–24)≥24 (agree/strongly agree each item)
Healthy rules0.77**0.63–0.860.5542 (39–45)42 (38–45)≥40 (often/always each item)

Healthy eating behaviour
Serves of fruit 0.80**0.69–0.88N/A2 (1-2)2 (1–3)2 or mor
Serves of vegetables0.86**0.77–0.91N/A3 (1–4)3 (2–4)3 or mor
Drink when thirsty 0.92**0.88–0.95N/A6 (6-6)6 (5-6)Wate

Knowledge of healthy eating
Fruit0.61**0.41–0.75N/A2 (2-2)2 (2-2)1-2/da
Vegetable0.66**0.49–0.78N/A3 (2-3)3 (2-3)3–5 serves per da

Activity
Attitude activity0.74**0.59–0.830.4624 (22–28)26 (22–28)≥28 (agree/strongly agree each item)
Rules activity0.67**0.50–0.790.2111 (9–12)11 (9–12)≥12 (often/always each item)

Other
Money0.37*0.13–0.54N/A2 (2-2)2 (2-2)≥3 (disagree/strongly disagree)
Breastfeeding0.71**0.56–0.82N/A2 (2-2)2 (2-2)≥3 (disagree/strongly disagree)

.
.
varied from 57 to 60 with for sweetened beverage score 53.
As per Australian Guide to Healthy Eating [15].
N/A: not applicable.