| |
Overall
|
Adult
|
Old
|
Adolescent
|
|---|
|
Range of age (years)
|
8–86
|
18–50
|
> 50
|
8–17
|
|
Number of studies
|
124
|
78
|
33
|
15
|
|
Population characteristics
|
|
Total number
|
20,830
|
11,336
|
7897
|
1597
|
|
Sample size
|
112 (14–1981)
|
102 (20–1623)
|
158 (14–1981)
|
101 (48–185)
|
|
Distribution of gender
|
|
Region
|
|
Africa
|
6 (4.88)
|
5 (6.49)
|
0 (0)
|
1 (6.67)
|
|
Oceania
|
8 (6.50)
|
5 (6.49)
|
2 (6.07)
|
1 (6.67)
|
|
Asia
|
37 (30.08)
|
22 (28.57)
|
11 (33.33)
|
4 (26.67)
|
|
Europe
|
35 (28.46)
|
22 (28.57)
|
10 (30.30)
|
4 (26.67)
|
|
America
|
37 (30.08)
|
23 (29.87)
|
10 (30.30)
|
5 (33.33)
|
|
FFQ design characteristics
|
|
Items of FFQ
|
|
≥ 120
|
61 (49.59)
|
41 (53.25)
|
15 (45.45)
|
5 (33.33)
|
|
< 120
|
62 (50.41)
|
36 (46.75)
|
18 (54.55)
|
10 (66.67)
|
|
Dietary recall intervals
|
|
≥ Previous 12 months
|
80 (65.04)
|
50 (64.94)
|
28 (84.85)
|
4 (26.67)
|
|
< Previous 12 months
|
33 (26.83)
|
20 (25.97)
|
3 (9.09)
|
10 (66.67)
|
|
Not available
|
10 (8.13)
|
7 (9.09)
|
2 (6.06)
|
1 (6.667)
|
|
Characteristics of the reproducibility studies
|
|
Administration mode of FFQ
|
|
Interview-administered
|
44 (35.77)
|
29 (37.66)
|
12 (36.36)
|
4 (26.67)
|
|
Self-administered
|
63 (51.22)
|
36 (46.75)
|
19 (57.58)
|
9 (60.00)
|
|
Not available
|
16 (13.01)
|
12 (15.59)
|
2 (6.06)
|
2 (13.33)
|
|
Intervals between FFQs
|
|
< 6 months
|
63 (51.22)
|
45 (58.44)
|
8 (24.24)
|
12 (80.00)
|
|
≥ 6 months
|
55 (44.72)
|
29 (37.66)
|
23 (69.70)
|
3 (20,00)
|
|
Both intervals
|
5 (4.06)
|
3 (3.90)
|
2 (6.06)
|
0 (0)
|
- aValues are N (%) or median (range)
