Table 4.

Attenuation factors for self-reported intake and correlation coefficients between self-reported and true intakes for log total sugars and log total sugars density among NPAAS (2007–2009) participants (primary study, n = 450; reliability study, n = 88)

Total sugars intake, g/dTotal sugars density, g/1,000 kcal
InstrumentAttenuation factorCorrelation with true intakeAttenuation factorCorrelation with true intake
FFQ0.22 (0.08)a0.22 (0.08)0.48 (0.13)0.32 (0.09)
4DFR0.33 (0.10)0.26 (0.08)0.32 (0.13)0.21 (0.09)
Single 24HR0.20 (0.06)0.20 (0.06)0.32 (0.07)0.26 (0.07)
Avg. of two 24HR0.29 (0.09)0.24 (0.08)0.48 (0.11)0.32 (0.08)
Avg. of three 24HR0.34 (0.10)0.26 (0.08)0.57 (0.13)0.36 (0.09)

NOTE: All the parameters were estimated using FFQ-, 24HR-, and 4DFR measurement errors models adjusted for BMI and age and biomarker measurement errors model adjusted for age.

  • aSE (all values in parentheses).