|
Energy and nutrients (unit)
|
Average daily intake
|
Percent agreements
|
Correlation coefficient between recalls/biomarkers and DFFQs
|
|---|
|
Recall(s)
|
DFFQ(s)
|
Same quartile (%)b
|
(same and adjacent quartile)c
|
Opposite quartiles (%)d
|
Unadjusted
|
Energy-Adjustede
|
De-attenuatedf
|
P. valueg
|
|---|
|
Mean
|
SD
|
Mean
|
SD
|
P. valuea
|
Spearman’ r
|
Spearman’ r
|
Spearman’ r
| |
|---|
|
Energy (kcal/d)
|
1952.3
|
59.7
|
3397.4
|
1673.4
|
0.0001
|
41.2
|
78
|
3.1
|
0.49
|
–
|
0.53
|
0.0001
|
|
Protein (g/d)
|
62.8
|
19.4
|
106.4
|
51.9
|
0.0001
|
37.7
|
82.3
|
1.8
|
0.51
|
0.51
|
0.54
|
0.0001
|
|
Fat (g/d)
|
63.3
|
23.7
|
107.2
|
58.9
|
0.0001
|
37.5
|
82.5
|
6.2
|
0.45
|
0.35
|
0.48
|
0.0001
|
|
Carbohydrate (g/d)
|
288.4
|
92.5
|
324.9
|
193.6
|
0.23
|
33.5
|
78.4
|
5.6
|
0.36
|
0.17
|
0.39
|
0.0001
|
|
Dietary fiber (g/d)
|
13.5
|
5.6
|
46.7
|
28.4
|
0.0001
|
34.8
|
67.7
|
5
|
0.30
|
0.33
|
0.32
|
0.0001
|
|
Cholesterol (mg/d)
|
188.7
|
106.4
|
324.9
|
193.6
|
0.0001
|
37.3
|
75.2
|
5
|
0.40
|
0.29
|
0.41
|
0.0001
|
|
Thiamin (mg/d)
|
1.9
|
0.84
|
4.8
|
2.9
|
0.0001
|
33.9
|
82.6
|
2.5
|
0.50
|
0.51
|
0.54
|
0.0001
|
|
Riboflavin (mg/d)
|
9.5
|
116.9
|
2.1
|
1
|
0.0001
|
34.8
|
77.3
|
5.8
|
0.31
|
0.26
|
0.32
|
0.0001
|
|
Vitamin C (mg/day)
|
100.3
|
50.4
|
559.2
|
379.2
|
0.0001
|
33.5
|
70.8
|
8.6
|
0.24
|
0.24
|
0.26
|
0.002
|
|
Vitamin E (mg/day)
|
3.9
|
4.6
|
8.1
|
8.8
|
0.0001
|
30.3
|
69
|
5.8
|
0.23
|
0.21
|
0.24
|
0.004
|
|
Folate (μg/day)
|
217.1
|
146.2
|
438
|
199.1
|
0.0001
|
28.1
|
68.1
|
10.6
|
0.12
|
0.091
|
0.13
|
0.1
|
|
Calcium (mg/day)
|
623.8
|
259.5
|
1170.2
|
550.6
|
0.0001
|
41.8
|
76.1
|
3.7
|
0.43
|
0.41
|
0.46
|
0.0001
|
|
Iron (mg/day)
|
17.2
|
8.8
|
45.9
|
27.8
|
0.0001
|
33.5
|
80.3
|
3.1
|
0.44
|
0.42
|
0.47
|
0.0001
|
|
Zinc (mg/day)
|
10.8
|
11.1
|
43.8
|
58
|
0.0001
|
36.8
|
71.5
|
7.6
|
0.24
|
0.16
|
0.25
|
0.003
|
|
Biomarkers
| | | | | | | | | | | | |
|
Retinol (mcg/day)
|
–
|
–
|
–
|
–
|
–
|
–
|
–
|
–
|
0.26
|
–
|
0.58
|
0.0001
|
|
Beta-carotene (mcg/day)
|
–
|
–
|
–
|
–
|
–
|
–
|
–
|
–
|
0.13
|
–
|
0.40
|
0.0001
|
- Only data of participants who had two FFQs and a minimum of three 24-h recalls were analyzed
- aPaired t test comparing DFFQ and Recalls in daily average intakes
- bPercentage of subjects in the same quartile of nutrient intakes from DFFQ1 and 6-day recalls
- cPercentage of subjects in the same and adjacent quartiles of nutrient intakes from DFFQ1 and 6-day recalls
- dOpposite (lowest/highest) quartiles
- eCalculated based on log-transformed value of average daily consumptions with adjustment for total energy intake using the residual method
- fCorrection were calculated based on energy-unadjusted correlation
- gFor all de-attenuated correlations, P < 0.001, except for Folate
