Table 3.

Intra-class correlations (ICC) of nutrient intakes for the three self-administered web-based and the three interviewer-administered telephone-based 24-h dietary recalls (n 514)

(Correlations and 95 % confidence intervals)

	Web-based 24-h recalls		Telephone-based 24-h recalls
	ICC*	95 % CI	ICC*	95 % CI
Energy
kcal	0·41	0·35, 0·46	0·40	0·34, 0·45
kJ	0·41	0·36, 0·46	0·40	0·34, 0·45
Macronutrients (g)
Total protein	0·32	0·26, 0·38	0·31	0·26, 0·37
Vegetable protein	0·41	0·36, 0·46	0·44	0·39, 0·49
Animal protein	0·24	0·19, 0·30	0·26	0·20, 0·32
Total fat	0·29	0·24, 0·35	0·26	0·21, 0·32
SFA	0·32	0·27, 0·38	0·26	0·20, 0·32
MUFA	0·25	0·20, 0·31	0·22	0·16, 0·28
PUFA	0·22	0·16, 0·28	0·24	0·18, 0·30
Linoleic acid	0·21	0·15, 0·26	0·22	0·17, 0·28
Trans-fatty acids	0·15	0·10, 0·21	0·07	0·02, 0·13
α-Linolenic acid	0·20	0·15, 0·26	0·23	0·17, 0·29
EPA	0·05	0·00, 0·10	0·05	0·00, 0·10
DHA	0·05	0·00, 0·10	0·04	−0·010·09
Cholesterol	0·16	0·11, 0·22	0·11	0·06, 0·17
Total carbohydrates	0·42	0·36, 0·47	0·47	0·42, 0·52
Mono- and disaccharides	0·40	0·35, 0·45	0·44	0·39, 0·49
Polysaccharides	0·36	0·31, 0·42	0·43	0·37, 0·48
Dietary fibre	0·39	0·34, 0·45	0·48	0·43, 0·53
Alcohol	0·57	0·52, 0·61	0·52	0·47, 0·57
Micronutrients
Ca (mg)	0·37	0·31, 0·42	0·37	0·31, 0·42
K (mg)	0·39	0·33, 0·44	0·39	0·34, 0·45
β-Carotene (μg)	0·07	0·02, 0·13	0·14	0·09, 0·20
Vitamin B1 (mg)	0·16	0·10, 0·21	0·13	0·08, 0·18
Vitamin B2 (mg)	0·37	0·31, 0·42	0·34	0·28, 0·39
Vitamin B6 (mg)	0·33	0·28, 0·39	0·30	0·25, 0·36
Vitamin B12 (μg)	0·11	0·05, 0·16	0·09	0·04, 0·15
Vitamin D (μg)	0·12	0·07, 0·18	0·16	0·10, 0·21
Vitamin E (mg)	0·24	0·18, 0·29	0·20	0·14, 0·26
Vitamin C (mg)	0·24	0·19, 0·30	0·23	0·18, 0·29
Lycopene (μg)	0·10	0·05, 0·16	0·07	0·02, 0·12
Retinol activity equivalents (μg)	0·11	0·06, 0·17	0·06	0·01, 0·11
Folic acid equivalents (μg)	0·38	0·33, 0·43	0·41	0·35, 0·46

^*ICC values are based on energy-adjusted values; energy-adjusted intakes were calculated using the residual method.