Table 2.

Correlation coefficients and cross-classification of energy and nutrients between three days of 24-hour dietary recall and five days of electronic Dietary Intake Assessment.

Energy and nutrients	Correlation coefficientsa,b			Cross-classification into quartilesc
	Unadjusted	Energy- adjusted	De- attenuated	Same	Same or adjacent	Extreme
Energy, kJ	0.66	—	0.68	38	81	0
Protein, g	0.79	0.77	0.79	58	87	1
Total fat, g	0.68	0.71	0.69	41	81	5
SFAd, g	0.75	0.78	0.76	46	91	0
MUFAe, g	0.62	0.62	0.64	45	79	6
PUFAf, g	0.50	0.43	0.55	46	82	2
Carbohydrate, g	0.64	0.75	0.67	49	87	2
Sugars, g	0.56	0.57	0.62	48	84	0
Starch, g	0.65	0.65	0.72	46	89	2
Fiber, g	0.54	0.63	0.64	59	93	1
Alcohol, g	0.77	0.69	0.62	44	88	1
Vitamin A REg, μg	0.61	0.66	0.61	49	88	4
Thiamin, mg	0.61	0.40	0.66	35	79	9
Riboflavin, mg	0.77	0.70	0.76	45	90	0
Niacin, mg	0.69	0.58	0.71	53	83	2
Folate DFEh, μg	0.69	0.72	0.71	58	89	2
Vitamin C, mg	0.68	0.71	0.75	56	89	0
Vitamin E, mg	0.53	0.60	0.56	40	85	1
Calcium, mg	0.75	0.57	0.72	40	80	2
Iron, mg	0.57	0.42	0.61	34	75	6
Zinc, mg	0.69	0.54	0.70	49	82	2
Magnesium, mg	0.71	0.69	0.72	48	88	0
Phosphorus, mg	0.76	0.69	0.78	53	87	1
Sodium, mg	0.60	0.59	0.60	48	88	5
Potassium, mg	0.64	0.68	0.68	59	92	2

^aPearson correlation coefficients used for energy and macronutrients; Spearman rank correlation coefficients used for alcohol and micronutrients.

^bAll correlations were significant (P<.001).

^cBased on energy-adjusted data.

^dSFA: saturated fatty acids

^eMUFA: monounsaturated fatty acids

^fPUFA: polyunsaturated fatty acids

^gRE: retinol equivalents

^hDFE: dietary folate equivalents