Table 3.
Validity: mean differences in intakes of energy, nutrients, vegetables and fruits based on the first FFQ (FFQ1) and the average of three 24 h dietary recalls (24HR), Pearson correlation coefficients and regression coefficients between both methods; adults (n 147) aged 21–74 years from the Southern Cone of Latin America (Argentina, Chile and Uruguay), September 2010 to February 2011
| 24HR – FFQ1 | Pearson correlation coefficient | Regression | |||||
|---|---|---|---|---|---|---|---|
| Nutrient/food | Mean | sd | Crude | Energy-adjusted | De-attenuated† | b†‡ | se |
| Energy (kJ/d) | 833·2 | 3518·3 | 0·43 | – | 0·54 | 0·31 | 0·08 |
| Protein (g/d) | −5·5 | 43·5 | 0·36 | 0·45 | 0·56 | 0·45 | 0·09 |
| Protein (%E) | 0·2 | 3·6 | 0·31 | – | 0·56 | 0·29 | 0·08 |
| Carbohydrate (g/d) | −15·3 | 105·6 | 0·44 | 0·59 | 0·84 | 0·58 | 0·07 |
| Carbohydrate (%E) | −0·06 | 6·2 | 0·47 | – | 0·63 | 0·49 | 0·08 |
| Fat (g/d) | −2·3 | 31·3 | 0·39 | 0·57 | 0·70 | 0·35 | 0·10 |
| Fat (%E) | 0·7 | 8·9 | 0·38 | – | 0·61 | 0·39 | 0·09 |
| SFA (g/d) | 1·0 | 12·0 | 0·41 | 0·49 | 0·69 | 0·78 | 0·11 |
| MUFA (g/d) | 1·1 | 13·3 | 0·38 | 0·43 | 0·63 | 0·63 | 0·12 |
| PUFA (g/d) | 1·6 | 9·4 | 0·30 | 0·41 | 0·62 | 0·54 | 0·11 |
| Cholesterol (mg/d) | 9·0 | 90·0 | 0·30 | 0·39 | 0·59 | 0·36 | 0·10 |
| Dietary fibre (g/d) | −2·0 | 4·8* | 0·42 | 0·51 | 0·75 | 0·32 | 0·05 |
| Ca (mg/d) | −60·0 | 333·0 | 0·37 | 0·53 | 0·76 | 0·63 | 0·09 |
| P (mg/d) | −121·0 | 559·4* | 0·40 | 0·46 | 0·73 | 0·40 | 0·07 |
| Fe (mg/d) | −2·0 | 8·4* | 0·34 | 0·41 | 0·73 | 0·37 | 0·08 |
| Zn (mg/d) | −0·9 | 7·1 | 0·44 | 0·41 | 0·72 | 0·91 | 0·20 |
| K (mg/d) | −490·0 | 711·1* | 0·32 | 0·48 | 0·63 | 0·30 | 0·05 |
| Na (mg/d) | −278·2 | 761·9 | 0·33 | 0·47 | 0·65 | 0·53 | 0·08 |
| Vitamin C (mg/d) | −26·3 | 70·0* | 0·36 | 0·51 | 0·70 | 0·40 | 0·07 |
| Thiamin (mg/d) | −0·003 | 1·0 | 0·29 | 0·39 | 0·54 | 0·48 | 0·10 |
| Riboflavin (mg/d) | −0·5 | 1·3* | 0·30 | 0·40 | 0·59 | 0·36 | 0·07 |
| Niacin (mg/d) | −1·9 | 5·7 | 0·26 | 0·41 | 0·58 | 0·56 | 0·11 |
| Vitamin B12 (μg/d) | −1·4 | 4·2* | 0·38 | 0·41 | 0·73 | 0·51 | 0·10 |
| Retinol (μg/d) | −256·5 | 48·9* | 0·32 | 0·42 | 0·62 | 0·30 | 0·06 |
| Fruits (g/d) | −35·0 | 150·4* | 0·52 | 0·49 | 0·63 | 0·47 | 0·07 |
| Vegetables (g/d) | −36·8 | 107·0* | 0·32 | 0·46 | 0·55 | 0·31 | 0·07 |
%E, percentage of energy.
*P < 0·05.
†Observed correlations were based on energy-adjusted values apart from energy and percentages of energy from macronutrients.
‡The regression coefficient is obtained by performing the regression of the specified FFQ-derived nutrient intake v. the 24HR-derived nutrient intake.