Table 4.
Mean% agreement and 95 % LOA between the FFQs and 24 hRs for CVD-related food groups and nutrients in Northwest Mexican adolescents (n 221)
| CVD-related food groups and nutrients | Mean% agreementb | (95 % CI) | LOAc (%) | Sloped | |
|---|---|---|---|---|---|
| (ß) | P valuee | ||||
| Fruits & vegetables (cups/d) | 226·9 | (198·7, 258·8) | 34·2−1505 | −0·522 | 0·0001 |
| Fish & shellfish (oz/wk) | 156·9 | (141·7, 177·6) | 17·7−575·1 | 0·919 | 0·0001 |
| Sodium (mg/d) | 112·5 | (99·5, 127·3) | 18·3−692·3 | 0·002 | 0·989 |
| SSBs (oz/wk) | 164·1 | (157·1, 171·8) | 12·2−337 | 0·011 | 0·925 |
| Whole grains (g/d) | 148·7 | (143·6, 154·6) | 10·4−247·3 | −0·126 | 0·22 |
| Nuts, seeds & legumes mean (servings/wk)a | 130·4 | (123·8, 138·7) | 50·5−466·2 | 1·244 | 0·0001 |
| Processed meats (oz/wk) | 198·9 | (186·1, 1113·8) | 16·5−1595·6 | −0·026 | 0·828 |
| Saturated fat (%kcal/d) | 162·7 | (158·4, 167·5) | 121·8−1183 | 0·388 | 0·0001 |
LOA, limit of agreement; FFQ, food frequency questionnaire; 24 hR, 24-h recall; CVD, cardiovascular disease; CI, confidence intervals; wk, week; SSB, sugar-sweetened beverage.
Nuts, seeds & legumes were not individually analysed since differences in intakes for the majority of individuals were ≤0 and their natural logarithm do not exist; thus, many observations were considered as missing values.
Exp(mean(FFQ − 24 hR)), all nutrient data were natural log-transformed.
95 % LOA [mean difference ± t(n−1, 0·05) (sd differences)].
Slope of the average of methods regressed on the difference between the methods (H0: β = 0, α = 0·05).
Bold P values represent slopes (ß) that are close to 0 and are non-significant, which means that the variance of the differences does not vary across the range of means; thus, there is no proportional bias.