Table 6

Protein, regression of log(biomarker) on log(self-report) and other predictors in NPAAS (n = 450) and R2
Food frequency questionnaire (FFQ) 4 day food record 24 Hr diet recall
Variable β SE R2 β SE R2 β SE R2
Intercept 4.252* 0.055 4.206* 0.051 4.250* 0.052
Log(Protein-FFQ-C) 0.132* 0.032 9.295 0.462* 0.049 22.141 0.397* 0.050 16.463
BMI-C 0.009* 0.003 5.481 0.009* 0.003 4.823 0.010* 0.003 5.513
Age-C -0.012* 0.002 4.03 -0.01* 0.002 2.493 -0.012* 0.002 3.530
Race: 2.65 3.115 3.547
Black -0.127* 0.043 -0.138* 0.038 -0.152* 0.039
Hispanic -0.122* 0.044 -0.10* 0.040 -0.106* 0.041
Other -0.029 0.080 0.001 0.073 -0.033 0.075
Meals at Home: 0.284 0.385 0.337
Med 0.027 0.035 0.046 0.032 0.033 0.033
High 0.049 0.036 0.049 0.033 0.046 0.034
Body Image: 0.136 0.254 0.117
Med 0.005 0.042 0.006 0.038 -0.007 0.039
High 0.040 0.068 0.062 0.063 0.031 0.065
TFEQ-R18:
Restraint 0.06 0.077 0.048
Med -0.016 0.033 -0.020 0.030 -0.011 0.031
High 0 0.040 0.007 0.037 0.023 0.038
Unc. Eat.: 0.919 0.608 0.640
Med -0.065 0.037 -0.059 0.034 -0.050 0.035
High -0.068 0.043 -0.048 0.040 -0.055 0.041
Emo. Eat.: 0.908 1.267 0.789
Med 0.054 0.037 0.062 0.034 0.049 0.035
High -0.024 0.050 -0.032 0.046 -0.023 0.047
Social Desirability: 0.109 0.130 0.112
Med 0.017 0.034 0.007 0.032 0.024 0.032
High 0.027 0.037 0.029 0.034 0.021 0.035
Total1 23.872 35.291 31.097

BMI, body mass index.

*β Coefficient differs from zero at p = 0.05 significance level.

1Total – percent of variation explained by all variables. R2 values for specific variables arise from analyses with only these regression variables, with subsequent rescaling so that these R2 values add to the total regression R2. R2 values for race/ethnicity pertain to comparisons among the four groups (white, black, Hispanic, other minority).

Suffix C (e.g. BMI-C) = Centered values; for psychosocial & meals at home variables: medium and high are compared to low.

Mossavar-Rahmani et al.

Mossavar-Rahmani et al. Nutrition Journal 2013 12:63   doi:10.1186/1475-2891-12-63

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