Table 3.

Reliability (n = 60^†) demonstrated by intraclass correlation coefficient (ICC) and 95% confidence intervals (CI) for the parent outcomes and internal consistency for the parent scores.

Score	Reliability data			Median (interquartile range)		Target score/response
	ICC	95% CI	Cronbach's alpha	Time 1
Food availability
Sweet beverages	0.86**	0.76–0.91	0.60	13 (10–15)	12.5 (10–15)	≥12 (less than weekly each item)
Non-core foods	0.81**	0.7–0.89	0.78	20 (17–23)	20 (17–23)	≥21 (less than weekly each item)
Fruit and vegetables	0.61**	0.42–0.75	0.13	13 (12–14)	13 (12–14)	≥12 (weekly or more often each item)
Healthy eating
Healthy attitudes	0.55**	0.34–0.70	0.35	22 (19–24)	22 (20–24)	≥24 (agree/strongly agree each item)
Healthy rules	0.77**	0.63–0.86	0.55	42 (39–45)	42 (38–45)	≥40 (often/always each item)
Healthy eating behaviour
Serves of fruit	0.80**	0.69–0.88	N/A	2 (1-2)	2 (1–3)	2 or more§
Serves of vegetables	0.86**	0.77–0.91	N/A	3 (1–4)	3 (2–4)	3 or more§
Drink when thirsty	0.92**	0.88–0.95	N/A	6 (6-6)	6 (5-6)	Water§
Knowledge of healthy eating
Fruit	0.61**	0.41–0.75	N/A	2 (2-2)	2 (2-2)	1-2/day§
Vegetable	0.66**	0.49–0.78	N/A	3 (2-3)	3 (2-3)	3–5 serves per day§
Activity
Attitude activity	0.74**	0.59–0.83	0.46	24 (22–28)	26 (22–28)	≥28 (agree/strongly agree each item)
Rules activity	0.67**	0.50–0.79	0.21	11 (9–12)	11 (9–12)	≥12 (often/always each item)
Other
Money	0.37*	0.13–0.54	N/A	2 (2-2)	2 (2-2)	≥3 (disagree/strongly disagree)
Breastfeeding	0.71**	0.56–0.82	N/A	2 (2-2)	2 (2-2)	≥3 (disagree/strongly disagree)

 *P < 0.05.

 **P < 0.001.

^† n varied from 57 to 60 with n for sweetened beverage score 53.

  ^§As per Australian Guide to Healthy Eating [15].

N/A: not applicable.