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. 2014 Aug 11;16(8):e190. doi: 10.2196/jmir.3355

Table 3.

Unadjusted correlation coefficients and cross-classification of quartiles of mean energy and nutrient intakes derived from repeat measures of the online Food4Me FFQ (N=100).

Nutrienta Correlationb Quartiles, %


Exact agreementc Exact agreement plus adjacentd Disagreemente Extreme disagreementf
Energy (kcal) .77g 57 90 9 1
Total fat (g) .81 64 92 8 0
Total fat (%TE) .72 56 91 7 2
SFA (g) .81 60 91 9 0
SFA (%TE) .70 46 88 12 0
MUFA (g) .80 51 96 4 0
MUFA (%TE) .70 53 89 10 1
PUFA (g) .78 51 95 3 2
PUFA (%TE) .68 45 92 6 2
Omega 3 (g) .78 58 91 9 0
Protein (g) .80 56 88 12 0
Protein (%TE) .73 59 93 7 0
Carbohydrate (g) .74 53 96 4 0
Carbohydrate (%TE) .73 62 89 9 2
Total sugars (g) .77 66 94 4 2
Total sugars (%TE) .69 61 88 11 1
Alcohol (g) .90 70 96 4 0
Calcium (mg) .73 55 92 7 1
Total folate (µg) .74 53 93 6 1
Iron (mg) .75 53 95 4 1
Total carotene (µg) .76 60 90 10 0
Riboflavin (mg) .73 56 90 8 2
Thiamin (mg) .71 51 91 6 3
Vitamin B6 (mg) .72 56 89 10 1
Vitamin B12 (µg) .73 64 95 5 0
Vitamin C (mg) .72 60 95 5 0
Vitamin A (RE) (µg) .90 74 98 2 0
Retinol (µg) .67 50 90 7 3
Vitamin D (µg) .65 52 87 12 1
Vitamin E (mg) .75 56 91 7 2
Salt (g) .78 57 90 8 2

aMUFA: monounsaturated fatty acids; PUFA: polyunsaturated fatty acids; RE: retinol equivalents; SFA: saturated fatty acids; TE: total energy.

bCorrelation is significant at the .01 level (2-tailed) for all nutrients analyzed.

cExact agreement, % of cases cross-classified into the same quartile.

dExact agreement plus adjacent, % of cases cross-classified into the same or adjacent quartile.

eDisagreement, % of cases cross-classified 2 quartiles apart.

fExtreme disagreement, % of cases cross-classified into extreme quartiles.

gPearson correlation.