Validity and reproducibility of an interviewer-administered food frequency questionnaire for healthy French-Canadian men and women

Table 1 Mean values of daily intakes of nutrients and Spearman correlation coefficients between values derived from the 3-day food record and the FFQ at week 0 of the nutritional intervention (n = 71).

	Dietary record	FFQ	Difference (%)^a	Unadjusted	Energy-adjusted
Energy (kcal) ^b	2055 ± 521	2143 ± 568	4.3	0.29**
Protein (g)	81.3 ± 16.4	82.6 ± 23.3	1.6	0.27*	0.36**
CHO (g)	245.0 ± 58.9	242.2 ± 60.5	-1.1	0.40**	0.60***
Lipids (g) ^b	80.1 ± 34.4	90.0 ± 34.8*	12.4	0.29*	0.56***
SFA (g) ^b	27.1 ± 14.0	30.0 ± 12.7	10.7	0.30**	0.56***
MUFA (g) ^b	33.9 ± 14.3	39.0 ± 16.3**	15.0	0.26*	0.48***
PUFA (g) ^b	13.1 ± 6.0	14.4 ± 7.0	9.9	0.38**	0.46***
EPA (g) ^b	0.06 ± 0.07	0.05 ± 0.04	-16.7	0.33**	0.33**
DHA (g) ^b	0.17 ± 0.23	0.12 ± 0.08	-29.4	0.30**	0.30**
Trans fat (g) ^b	3.4 ± 2.0	3.6 ± 2.6	5.9	0.45***	0.56***
Cholesterol (mg) ^b	280.1 ± 139.8	300 ± 116	7.5	0.30**	0.36**
Dietary fiber (g)	21.9 ± 6.4	19.7 ± 5.0*	-10.0	0.32**	0.38**
Soluble fiber (g)	7.3 ± 2.0	6.6 ± 1.7**	-9.6	0.22	0.27*
Insoluble fiber (g)	14.4 ± 4.7	13.2 ± 3.5	-8.3	0.32**	0.37**
Alchool (g) ^b	11.4 ± 11.2	10.9 ± 10.7	-4.4	0.61***	0.66***
Vitamin C (mg)	138.5 ± 57.3	137.0 ± 62.2	-1.1	0.19	0.19
Folate (mcg)	394.6 ± 115.4	383.2 ± 107.1	-2.9	0.32**	0.39**
Calcium (mg)	898.4 ± 320.5	962.3 ± 399.8	7.1	0.49***	0.56***
Iron (mg) ^b	15.1 ± 4.3	14.1 ± 4.1	-6.6	0.43**	0.53***

Value are means ± SD
^a (value derived from FFQ-value derived from 3-day food record)/(value derived from 3-day food record) × 100
^b Analyses were performed on log transformed values
Significant difference between the two methods *p ≤ 0.05; **p ≤ 0.01; ***p ≤ 0.0001
Correlations between FFQ and 3-day food record were statistically significant at * p ≤ 0.05; ** p ≤ 0.01; *** p ≤ 0.0001

ISSN: 1475-2891