Table 2 Correlation coefficients of energy and nutrient intakes from dietary records and food frequency questionnaire for Japanese athletes. (n = 78)
From: Development and validation of a food frequency questionnaire for Japanese athletes (FFQJA)
Nutrient intake | DR | FFQJA | Correlation coefficient | |||||
|---|---|---|---|---|---|---|---|---|
Median | (Interquartile range) | Median | (Interquartile range) | Crude (95% CI) | Energy-adjusted (95% CI) | ICC (95% CI) | ||
Energy | (kcal) | 2560 | (2074, 2962) | 2502 | (2073, 3391) | 0.523 (0.324–0.678) | – | 0.466 (0.273–0.623) |
Protein | (g) | 91.1 | (72.9, 102.5) | 94.5 | (73.1, 117.0) | 0.445 (0.234–0.616) | 0.314 (0.090–0.508) | 0.393 (0.188–0.565) |
Fat | (g) | 80.8 | (65.1, 98.2) | 73.6 | (58.4, 89.3) | 0.344 (0.122–0.533) | 0.270 (0.043–0.470) | 0.338 (0.126–0.521) |
Carbohydrate | (g) | 347.9 | (273.0, 400.4) | 374.0 | (308.6, 510.9) | 0.550 (0.356–0.699) | 0.353 (0.132–0.541) | 0.470 (0.278–0.626) |
Calcium | (mg) | 509 | (415, 670) | 573 | (432, 803) | 0.379 (0.160–0.562) | 0.584 (0.397–0.724) | 0.367 (0.207–0.578) |
Iron (Fe) | (mg) | 8.2 | (6.8, 9.9) | 8.2 | (6.2, 10.4) | 0.436 (0.223–0.609) | 0.491 (0.397–0.724) | 0.409 (0.207–0.578) |
Retinol | (ηgRAE) | 511 | (397, 733) | 586 | (410, 1094) | 0.407 (0.191–0.585) | 0.515 (0.286–0.653) | 0.351 (0.140–0.531) |
Vitamin B1 | (mg) | 1.28 | (1.02, 1.58) | 1.29 | (0.99, 1.77) | 0.399 (0.182–0.579) | 0.293 (0.286–0.653) | 0.369 (0.161–0.546) |
Vitamin B2 | (mg) | 1.34 | (1.08, 1.60) | 1.53 | (1.10, 1.89) | 0.473 (0.266–0.639) | 0.574 (0.314–0.672) | 0.433 (0.234–0.597) |
Vitamin C | (mg) | 109 | (77, 154) | 126 | (71, 170) | 0.273 (0.046–0.473) | 0.464 (0.067–0.490) | 0.256 (0.036–0.451) |
Dietary fiber | (g) | 13.6 | (11.9, 16.7) | 13.4 | (10.6, 16.6) | 0.222 (−0.006–0.428) | 0.500 (0.385–0.717) | 0.213 (−0.009–0.415) |