Table 2.
Paired comparison of dietary intake data from 3-day food diaries and the food frequency questionnaire.
| Variables | Three-day diary | FFQ | Paired difference | |
|---|---|---|---|---|
| Mean ± SEM | Mean ± SEM | Mean ± SEM | P | |
| Total energy (kcal/d) | 2022 ± 40 | 2004 ± 63 | 18 ± 58 | .758 |
| Total protein (g/d) | 85.3 ± 1.8 | 85.2 ± 2.9 | 0.0 ± 2.6 | .989 |
| Total fat (g/d) | 84.5 ± 2.0 | 77.4 ± 2.6 | 7.1 ± 2.5 | .006 |
| Total carbohydrate (g/d) | 230.9 ± 5.7 | 243.5 ± 8.5 | −12.6 ± 7.6 | .099 |
| Relative energy (kcal/kg/d) | 29.736 ± 0.686 | 29.378 ± 0.977 | 0.359 ± 0.858 | .676 |
| Relative protein (g/kg/d) | 1.262 ± 0.033 | 1.245 ± 0.044 | 0.016 ± 0.038 | .669 |
| Relative fat (g/kg/d) | 1.238 ± 0.033 | 1.128 ± 0.039 | 0.110 ± 0.037 | .003 |
| Relative carbohydrate (g/kg/d) | 3.401 ± 0.095 | 3.587 ± 0.133 | −0.187 ± 0.113 | .100 |
| Protein percent energy (%) | 17.3 ± 0.3 | 17.1 ± 0.2 | 0.1 ± 0.3 | .622 |
| Fat percent energy (%) | 37.2 ± 0.5 | 34.8 ± 0.5 | 2.4 ± 0.4 | <.001 |
| Carbohydrate percent energy (%) | 45.0 ± 0.6 | 48.4 ± 0.6 | −3.3 ± 0.6 | <.001 |
Abbreviations: FFQ, food frequency questionnaire 38 ; SEM, standard error of the mean.