Table 2.
Reliability of the SAYCARE FFQ
| Children (3–10 years) | Adolescents (11–18 years) | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FFQ1 | FFQ2 | FFQ1 | FFQ2 | |||||||||||||||
| Food groups in grams per day (except for beverages)* | n | Median | 95 % CI | Median | 95 % CI | ρ | κw | % Agreement† | ICC | n | Median | 95 % CI | Median | 95 % CI | ρ | κw | % Agreement† | ICC |
| Cereals | 200 | 176·02 | 219·21, 383·29 | 154·06 | 179·25, 343·50‡ | 0·53 | 0·35 | 70·75 | 0·97 | 244 | 235·63 | 275·15, 376·75 | 196·60 | 248·61, 416·64‡ | 0·56 | 0·44 | 75·41 | 0·94 |
| Tubers | 194 | 24·50 | 31·87, 67·33 | 28·00 | 35·17, 109·23 | 0·56 | 0·45 | 74·23 | 0·88 | 235 | 35·00 | 56·91, 115·10 | 35·00 | 50·47, 121·63 | 0·49 | 0·40 | 73·83 | 0·96 |
| Vegetables | 185 | 41·25 | 33·88, 123·25 | 28·50 | 27·87, 118·59‡ | 0·60 | 0·43 | 74·86 | 0·99 | 214 | 39·50 | 55·99, 80·90 | 30·11 | 54·88, 89·91 | 0·60 | 0·43 | 75·00 | 0·90 |
| Fruits | 192 | 120·00 | 179·22, 279·16 | 107·05 | 154·32, 248·70 | 0·58 | 0·49 | 77·60 | 0·87 | 227 | 120·00 | 183·00, 280·20 | 103·20 | 152·71, 239·34 | 0·66 | 0·57 | 80·84 | 0·67 |
| Oils | 184 | 5·00 | 8·13, 12·62 | 5·00 | 7·63, 11·21 | 0·58 | 0·47 | 76·09 | 0·90 | 221 | 6·45 | 10·09, 14·12 | 5·70 | 9·88, 14·18 | 0·57 | 0·48 | 77·15 | 0·79 |
| Meat and derivatives, fish and eggs | 197 | 151·70 | 146·50, 336·35 | 151·60 | 151·71, 355·90 | 0·57 | 0·41 | 74·11 | 0·99 | 238 | 168·47 | 208·28, 275·96 | 182·95 | 222·82, 339·09 | 0·63 | 0·53 | 79·20 | 0·91 |
| Milk and dairy products | 197 | 495·90 | 512·60, 621·49 | 430·22 | 477·19, 588·61 | 0·49 | 0·44 | 74·62 | 0·99 | 235 | 325·45 | 402·54, 528·33 | 285·00 | 316·17, 414·94‡ | 0·56 | 0·44 | 75·11 | 0·66 |
| Legumes | 176 | 22·80 | 37·31, 61·62 | 22·40 | 35·55, 62·94 | 0·73 | 0·63 | 83·52 | 0·98 | 220 | 30·00 | 43·02, 74·26 | 30·80 | 41·90, 123·64 | 0·67 | 0·52 | 78·86 | 0·99 |
| Beverages | 197 | 773·20 | 815·59, 1076·58 | 672·30 | 721·11, 963·58‡ | 0·58 | 0·49 | 76·90 | 0·96 | 234 | 1241·10 | 1146·95, 1340·78 | 1056·80 | 1048·56, 1284·15‡ | 0·47 | 0·35 | 71·58 | 0·92 |
| Beverages§ | – | – | – | – | – | – | – | 234 | 1248·35 | 1151·97, 1345·89 | 1056·80 | 1052·71, 1287·97‡ | 0·47 | 0·36 | 71·79 | 0·92 | ||
| Sugar products | 194 | 67·66 | 88·08, 190·61 | 67·29 | 76·91, 193·36 | 0·63 | 0·52 | 78·61 | 0·99 | 235 | 48·07 | 76·18, 130·19 | 59·42 | 91·56, 205·51 | 0·54 | 0·38 | 72·98 | 0·75 |
| Miscellaneous | 147 | 7·35 | 12·70, 22·99 | 8·40 | 12·36, 19·50 | 0·65 | 0·43 | 73·81 | 0·89 | 177 | 8·40 | 14·02, 24·49 | 8·40 | 14·70, 27·69 | 0·65 | 0·59 | 81·36 | 0·97 |
FFQ1, first FFQ application; FFQ2, second FFQ application; κw, weighted Cohen’s kappa coefficient for tertiles comparison; ρ, Spearman rho coefficient; ICC, Intraclass correlation coefficient.
*
Beverages in ml/d.
†
Percentage of children/adolescents classified in the same or an adjacent tertiles.
‡
P < 0·05 for the comparison between FFQ1 and FFQ2 intakes (Wilcoxon test). Spearman and κw coefficients in bold when P < 0·05.
§
Beverages including alcohol.