Table 10.
Within-person and between-person variance, ratio of these two parameters and the coefficient of variation for usual intake of thiamine, niacin, riboflavin, vitamin B6, vitamin B12 and folate, by age group.
| Nutrient (Box-Cox TP) |
Age: 1–<3 Years | Age: 3–<6 Years | Age: 6–<10 Years | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Var_e | Var_u | Ratio | CV (%) |
Var_e | Var_u | Ratio | CV (%) |
Var_e | Var_u | Ratio | CV (%) |
|
| Thiamine (λ = 0.26) | 0.11 | 0.11 | 1.00 | 2.9 | 0.12 | 0.07 | 1.71 | 1.3 | 0.10 | 0.08 | 1.25 | 2.9 |
| Niacin (λ = 0.34) | 1.06 | 0.19 | 5.58 | 3.2 | 0.76 | 0.44 | 1.73 | 1.7 | 0.85 | 0.54 | 1.57 | 2.2 |
| Riboflavin (λ = 0.18) | 0.22 | 0.16 | 1.38 | 9.8 | 0.24 | 0.06 | 4.00 | 2.7 | 0.17 | 0.15 | 1.13 | 2.7 |
| Vitamin B6 (λ = 0.20) | 0.21 | 0.06 | 3.50 | 3.4 | 0.25 | 0.06 | 4.17 | 0.8 | 0.23 | 0.13 | 1.77 | 1.5 |
| Vitamin B12 (λ = 0.13) | 1.27 | 0.62 | 2.05 | 5.9 | 2.48 | 0.03 | 2.67 | 4.2 | 2.01 | 0.71 | 2.83 | 9.0 |
| Folate (λ = 0.07) | 0.44 | 0.28 | 1.57 | 5.7 | 0.52 | 0.23 | 2.26 | 1.6 | 0.38 | 0.23 | 1.65 | 2.7 |
A lambda value < 0.15 reflects a larger mean bias as a result of sensitivity to the transformation applied [16]. Lambda values associated with the first execution or base run of the macros are reported. Var_e: Within-person variance; Var_u: Between person variance; Ratio = Var_e/Var_u, the ratio of within-person to between-person variance. CV: Coefficient of variation of the mean of usual intake calculated as follows: CV = 100 × (standard error of the mean)/mean. TP: Transformation parameter.