Relative validation of a food frequency questionnaire for national health and nutrition monitoring

Nutrition Journal

Table 4 Food intake assessed by the food frequency questionnaire and two 24-hour dietary recalls and differences between both methods: mean and standard deviation (SD)

	Food intake (g/d)
		Food frequency questionnaire		24-hour dietary recalls		Differences FFQ - 24-hour dietary recalls
Food group	N	Mean	SD	Mean	SD	Mean	SD	P *
Coffee	159	403.5	343.2	509.4	406.3	-105.8	313.3	< 0.001
Alcoholic beverages	155	126.8	183.8	174.6	277.4	-47.8	180.6	0.059
Tea	159	324.6	479.2	350.9	493.4	-26.3	374.2	0.161
Meat products	161	29.7	28.0	44.3	45.7	-14.6	43.3	< 0.001
Sweets	159	50.9	52.0	65.4	62.9	-14.5	63.2	0.008
Pasta, noodles	161	23.8	21.6	34.1	61.8	-10.3	58.2	0.896
Butter and margarine	161	8.3	9.4	17.7	17.8	-9.4	14.7	< 0.001
Sweet spreads	159	9.8	10.2	18.8	22.4	-8.9	18.7	< 0.001
Fast food	159	10.5	15.7	18.3	41.2	-7.9	38.1	0.626
Fish	161	16.9	19.0	21.5	49.9	-4.7	49.2	0.026
Breakfast cereals	161	3.6	7.2	7.2	19.9	-3.6	16.6	0.857
Processed fruits	160	6.6	11.9	10.1	32.0	-3.5	31.0	0.029
Pizza	160	14.6	19.4	16.9	62.5	-2.2	63.1	< 0.001
Salty snacks	161	4.6	9.0	6.2	15.4	-1.6	14.0	0.099
Bread	153	143.6	98.5	144.7	76.6	-1.1	94.8	0.401
Eggs	161	12.5	10.9	13.5	23.3	-0.9	23.5	0.419
Cream cheese	161	4.3	8.0	4.7	14.8	-0.4	13.0	0.002
Legumes	158	14.3	21.9	13.8	36.9	0.5	40.5	0.003
Meat	160	52.7	46.4	52.1	58.6	0.6	66.0	0.501
Cooked vegetables	158	54.6	51.5	50.9	51.7	3.7	68.7	0.474
Cheese	161	26.2	25.9	16.2	18.2	9.8	25.5	< 0.001
Rice	161	19.2	21.6	9.1	27.4	10.1	30.3	< 0.001
Potatoes	160	85.8	57.1	70.6	82.7	15.2	81.8	< 0.001
Raw vegetables	158	72.9	81.8	39.4	48.8	33.5	77.3	< 0.001
Curd cheese, soured milk, yoghurt	160	95.1	107.3	57.6	86.7	37.5	111.4	< 0.001
Non alcoholic beverages	149	357.8	473.0	288.2	378.4	69.6	394.3	0.003
Fresh fruits	161	247.7	81.8	174.9	174.2	72.8	280.0	< 0.001
Water	138	842.3	608.7	743.3	514.1	99.0	594.6	0.292
Milk	158	220.2	244.7	111.5	170.3	108.7	249.6	< 0.001

ISSN: 1475-2891