Food and beverage portion sizes in Australian children: a secondary analysis of 1995 and 2007 national data

BMC Public Health

Table 1 Demographic data of participants of the 1995 NNS and 2007 ANCNPAS

	2-4 years		5-8 years		9-12 years		13-16 years
	1995	2007	1995	2007	1995	2007	1995	2007
n =	581	1491	624	954	544	966	449	1388
Mean age (y) [SD]	2.97^c [0.81]	2.83^c [0.74]	6.42^b [1.12]	6.60^b [1.12]	10.47 [1.14]	10.53 [1.10]	14.47 [1.12]	14.55 [1.01]
Sex (%)
Male	49	52	55	51	53	47	52	50
Female	51	48	45	49	47	53	48	50
Weight status ^† (%)
Underweight	8.1	4.4	4.5	3.7	2.9	5.6	4.5	4.1
Normal	70.7	74.6	63.9	76.2	65.8	67.0	67.5	70.4
Overweight	13.1	15.4	23.6	13.6	23.7	19.4	20.5	17.8
Obese	5.0	3.4	7.7	6.2	7.4	7.2	6.0	6.4
Unknown	3.1	2.1^b*	0.3	0.3^c*	0.2	0.8^a*	1.6	0.4
Intake (%)
Usual	65.7	97.9	63	97.1	61.4	72.5	56.6	72.3
Unusual	32.7	2.1^c*	36.4	2.9^c*	38.2	27.5^c*	43.2	27.7^c*

^ap value <0.05.
^bp value <0.01.
^cp value <0.001.
*The distribution of the specified categorical variables significantly differs between 1995 and 2007.
^†When decimal age could not be determined it was assumed age was midway through the year [43, 44].

ISSN: 1471-2458