Use of a food frequency questionnaire in American Indian and Caucasian pregnant women: a validation study

BMC Public Health

Table 5 Joint classification of nutrient intakes from three week-12 diet recalls and three week-28 diet recalls ^a

	Percentage in same quartile of intake for phase 1 and phase 2 recalls ^b
Nutrient	Quartile 1 (low)	Quartile 2	Quartile 3	Quartile 4 (high)
Carbohydrates (g)	44	32	30	36
Protein (g)	31	29	22	34
Dietary fiber (g)	31	34	27	53
Total fat (g)	37	27	38	31
Saturated fat (g)	39	29	32	46
Mono unsaturated fat (g)	39	22	38	36
Poly unsaturated fat (g)	27	29	30	25
Omega 3 fatty acids (g)	27	29	32	27
Cholesterol	29	29	35	44
Sucrose	47	29	27	41
Calcium	49	24	33	44
Iron (mg)	51	34	40	41
Magnesium (mg)	42	32	38	51
Phosphorus (mg)	39	25	27	44
Zinc (mg)	51	31	43	42
Vitamin A (IU)	41	25	38	37
Vitamin E (mg)	42	25	33	37
Vitamin C (mg)	51	32	25	42
Vitamin B1 (mg)	53	29	38	39
Vitamin B2 (mg)	54	29	30	44
Niacin (mg)	46	32	37	36
Folate (mcg)	54	32	42	41
Vitamin B6 (mg)	51	32	37	32
Vitamin B12 (mcg)	41	20	23	31

^a Excluded if calories > 4500 (n = 5) or age < 16 (n = 3) on the HSFFQ2 or HSFFQ3 (n = 237)
^b Nutrient intakes adjusted for total energy intake before quartile classification

ISSN: 1471-2458