Examination of the Five Comparable Component Scores of the Diet Quality Indexes HEI-2005 and RC-DQI Using a Nationally Representative Sample of 2–18 Year Old Children: NHANES 2003–2006

Table 3

Correlation coefficients (𝑟-square) between the comparable component scores of the HEI 2005 and RC-DQI in the total sample and three mutually exclusive age groups.

HEI 2005
Components	RC-DQI
	Milk/Dairy	Fruits	Vegetables	Total grain	Whole grain
Total sample (𝑁 = 5,936)
Milk/dairy	0.3381**	0.1217**	0.0350	0.0337	0.1569**
Fruit	0.0297	0.5506**	0.0838**	−0.0058	0.1418**
Vegetables	−0.0724**	−0.0344	0.2769**	−0.0843**	−0.0275
Total grains	−0.0469*	0.0024	−0.1004**	0.1659**	0.0376
Whole grains	0.0066	0.0536**	−0.0351	0.0453**	0.4145**
2–5 year olds (𝑁 = 1,405)
Milk/dairy	0.2036**	0.0045	−0.0467	−0.0772	0.0432
Fruit	−0.0252	0.5555**	0.0481	−0.0007	0.1871**
Vegetables	−0.0709	−0.0520	0.2601**	−0.0511	−0.0417
Total grains	−0.0668	0.0186	−0.0953*	0.1867**	0.1871**
Whole grains	−0.0682	0.0462	−0.1035*	0.0686**	0.4263**
6–11 year olds (𝑁 = 1,586)
Milk/dairy	0.2769**	0.0535	−0.0718	−0.0263	0.0888
Fruit	−0.0247	0.4800**	−0.0334	−0.0433	0.1057*
Vegetables	−0.0492	0.0129	0.2948**	−0.0737	−0.0239
Total grains	−0.0691	0.0636	−0.0897**	0.1573**	−0.0098
Whole grains	−0.0121	0.0918*	0.0130	0.0613**	0.3613**
12–18 year olds (𝑁 = 2,945)
Milk/dairy	0.3702**	0.0251	−0.0483	0.0003	0.1813**
Fruit	−0.0062	0.5476**	0.0039	−0.0835*	0.0029
Vegetables	−0.0659	−0.0292	0.3633**	−0.0797*	0.0053
Total grains	−0.0071	−0.0246	−0.1118**	0.1942**	0.0106
Whole grains	0.0504	0.0115	−0.0525	0.0246	0.4781**

∗significant at P value < 0.05.
∗∗significant at P value < 0.01.