Table 2.
Coefficients of within-person variation (CVW) and the number of days required to estimate the true intakes of unadjusted- and adjusted-nutrients to lie within specified % of true means (data provided by 131 residents in Japan).
| Unadjusted | Adjustedb | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Nutrient | CVWa (95% CI) | Specified Limit as % | CVW (95% CI) | Specified Limit as % | ||||||
| 10% | 20% | 30% | 40% | 10% | 20% | 30% | 40% | |||
| Energy/kcal | 0.19 (0.18, 0.20) | 14 | 4 | 2 | 1 | |||||
| Protein/g | 0.22 (0.21, 0.24) | 19 | 5 | 3 | 2 | 0.17 (0.17, 0.18) | 12 | 3 | 2 | 1 |
| Lipid /g | 0.34 (0.32, 0.36) | 45 | 12 | 5 | 3 | 0.23 (0.22, 0.25) | 21 | 6 | 3 | 2 |
| SFAc/g | 0.41 (0.39, 0.44) | 65 | 17 | 8 | 5 | 0.31 (0.30, 0.33) | 37 | 10 | 5 | 3 |
| MSFAd/g | 0.41 (0.39, 0.44) | 65 | 17 | 8 | 5 | 0.31 (0.29, 0.32) | 37 | 10 | 5 | 3 |
| PUFAe/g | 0.39 (0.37, 0.41) | 59 | 15 | 7 | 4 | 0.32 (0.30, 0.33) | 40 | 10 | 5 | 3 |
| n-3PUFA/g | 0.60 (0.56, 0.64) | 139 | 35 | 16 | 9 | 0.55 (0.52, 0.59) | 117 | 30 | 13 | 8 |
| n-6PUFA/g | 0.41 (0.39, 0.44) | 65 | 17 | 8 | 5 | 0.35 (0.33, 0.36) | 48 | 12 | 6 | 3 |
| Carbohydrates/g | 0.20 (0.19, 0.21) | 16 | 4 | 2 | 1 | 0.13 (0.12, 0.13) | 7 | 2 | 1 | 1 |
| Cholesterol/mg | 0.48 (0.45, 0.51) | 89 | 23 | 10 | 6 | 0.48 (0.46, 0.51) | 89 | 23 | 10 | 6 |
| Total fiber/g | 0.30 (0.28, 0.32) | 35 | 9 | 4 | 3 | 0.27 (0.26, 0.29) | 29 | 8 | 4 | 2 |
| Soluble fiber/g | 0.41 (0.39, 0.44) | 65 | 17 | 8 | 5 | 0.39 (0.37, 0.42) | 59 | 15 | 7 | 4 |
| Insoluble fiber/g | 0.30 (0.28, 0.32) | 35 | 9 | 4 | 3 | 0.30 (0.28, 0.32) | 35 | 9 | 4 | 3 |
| Vitamin A/μg REf | 1.72 (1.53, 1.92) | 1137 | 285 | 127 | 72 | 1.70 (1.53, 1.88) | 1111 | 278 | 124 | 70 |
| Vitamin D/μg | 1.13 (1.03, 1.25) | 491 | 123 | 55 | 31 | 1.31 (1.20, 1.44) | 660 | 165 | 74 | 42 |
| alpha-Tocopherol/mg | 0.37 (0.35, 0.39) | 53 | 14 | 6 | 4 | 0.32 (0.31, 0.34) | 40 | 10 | 5 | 3 |
| Vitamin K/μg | 0.57 (0.52, 0.62) | 125 | 32 | 14 | 8 | 0.57 (0.53, 0.62) | 125 | 32 | 14 | 8 |
| Vitamin B1/mg | 0.37 (0.35, 0.39) | 53 | 14 | 6 | 4 | 0.33 (0.31, 0.34) | 42 | 11 | 5 | 3 |
| Vitamin B2/mg | 0.27 (0.26, 0.29) | 29 | 8 | 4 | 2 | 0.25 (0.24, 0.26) | 25 | 7 | 3 | 2 |
| Niacin/mg NEg | 0.26 (0.24, 0.27) | 26 | 7 | 3 | 2 | 0.23 (0.22, 0.24) | 21 | 6 | 3 | 2 |
| Vitamin B6/mg | 0.27 (0.25, 0.29) | 29 | 8 | 4 | 2 | 0.24 (0.23, 0.26) | 23 | 6 | 3 | 2 |
| Vitamin B12/μg | 1.03 (0.94, 1.13) | 408 | 102 | 46 | 26 | 1.22 (1.12, 1.33) | 572 | 143 | 64 | 36 |
| Folate/μg | 0.35 (0.33, 0.37) | 48 | 12 | 6 | 3 | 0.34 (0.32, 0.36) | 45 | 12 | 5 | 3 |
| Pantothenic acid/mg | 0.24 (0.23, 0.25) | 23 | 6 | 3 | 2 | 0.21 (0.20, 0.22) | 17 | 5 | 2 | 2 |
| Vitamin C/mg | 0.40 (0.37, 0.43) | 62 | 16 | 7 | 4 | 0.40 (0.37, 0.43) | 62 | 16 | 7 | 4 |
| Sodium/mg | 0.31 (0.29, 0.32) | 37 | 10 | 5 | 3 | 0.29 (0.27, 0.30) | 33 | 9 | 4 | 3 |
| Salt-Eq/g | 0.31 (0.29, 0.33) | 37 | 10 | 5 | 3 | 0.29 (0.28, 0.31) | 33 | 9 | 4 | 3 |
| Potassium/mg | 0.23 (0.21, 0.24) | 21 | 6 | 3 | 2 | 0.20 (0.19, 0.21) | 16 | 4 | 2 | 1 |
| Calcium/mg | 0.36 (0.33, 0.38) | 50 | 13 | 6 | 4 | 0.33 (0.31, 0.35) | 42 | 11 | 5 | 3 |
| Magnesium/mg | 0.29 (0.27, 0.30) | 33 | 9 | 4 | 3 | 0.26 (0.25, 0.28) | 26 | 7 | 3 | 2 |
| Phosphorus/mg | 0.22 (0.21, 0.23) | 19 | 5 | 3 | 2 | 0.17 (0.16, 0.18) | 12 | 3 | 2 | 1 |
| Iron/mg | 0.28 (0.26, 0.30) | 31 | 8 | 4 | 2 | 0.25 (0.24, 0.27) | 25 | 7 | 3 | 2 |
| Selenium/μg | 0.51 (0.48, 0.54) | 100 | 25 | 12 | 7 | 0.50 (0.48, 0.53) | 97 | 25 | 11 | 7 |
| Zinc/mg | 0.28 (0.26, 0.29) | 31 | 8 | 4 | 2 | 0.23 (0.22, 0.24) | 21 | 6 | 3 | 2 |
| Cupper/mg | 0.26 (0.25, 0.28) | 26 | 7 | 3 | 2 | 0.26 (0.24, 0.27) | 26 | 7 | 3 | 2 |
| Manganese/mg | 0.27 (0.25, 0.28) | 29 | 8 | 4 | 2 | 0.26 (0.25, 0.28) | 26 | 7 | 3 | 2 |
| beta_carotene/μg | 0.71 (0.65, 0.78) | 194 | 49 | 22 | 13 | 0.71 (0.65, 0.77) | 194 | 49 | 22 | 13 |
| alpha_carotene/μg | 1.08 (0.96, 1.20) | 449 | 113 | 50 | 29 | 2.59 (2.24, 2.99) | 2577 | 645 | 287 | 162 |
| beta_cryptoxanthin/μg | 1.72 (1.48, 1.99) | 1137 | 285 | 127 | 72 | 2.24 (1.92, 2.62) | 1928 | 482 | 215 | 121 |
* The data in this study were collected between 2014 and 2015 in Nagasaki Prefecture, Japan. The title of this study is Reliability of Repeated Measures of Nutrient Intake by Diet Records in Residents in the Western Region of Japan. a Analysis was done using 1571 diet records; each of the 130 participants provided 12 diet records and one submitted 11 records. b Adjustment by use of the residual model method. c Saturated fatty acid. d Monounsaturated fatty acid. e Polyunsaturated fatty acid. f Retinol equivalent. g Niacin equivalent.