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. 2022 Feb 8;191(6):1125–1139. doi: 10.1093/aje/kwac026

Table 5.

Attenuation and Correlation Factorsa for Reported Intakes of Protein and Protein Density in the Multi-Cohort Eating and Activity Study for Understanding Reporting Error, United States, January 2011 to October 2013

Women Men
IDATA Women WLVS IDATA Men MLVS
Attenuation Correlation Attenuation Correlation Attenuation Correlation Attenuation Correlation
Instrument andNo. or Adjustment Estimate SE Estimate SE Estimate SE Estimate SE Estimate SE Estimate SE Estimate SE Estimate SE
Protein
 FFQ, single 0.16b 0.03 0.29b 0.05 0.25 0.03 0.32 0.04 0.19b 0.03 0.34b 0.05 0.28 0.03 0.34 0.04
 FFQ, 2 0.20b 0.03 0.32b 0.05 0.29 0.03 0.34 0.04 0.22b 0.03 0.37b 0.05 0.33 0.04 0.38 0.04
 FFQ, adjustedc 0.25b 0.04 0.35 0.04 0.26b 0.04 0.42 0.05
 ASA24, single 0.18b 0.02 0.30b 0.03 0.21b 0.02 0.33b 0.03 0.21b 0.02 0.34b 0.03 0.19b 0.02 0.30b 0.03
 ASA24, 4 0.38b 0.04 0.43b 0.05 0.46b 0.04 0.49b 0.04 0.45b 0.04 0.50b 0.04 0.42b 0.04 0.45b 0.04
 ASA24, 6 0.43b 0.05 0.46b 0.05 0.54b 0.05 0.53b 0.04 0.51b 0.05 0.54b 0.04 0.48b 0.05 0.48b 0.04
 ASA24, 12 0.51b 0.06 0.50b 0.05 0.64b 0.07 0.58b 0.05 0.60b 0.06 0.58b 0.05 0.56b 0.06 0.52b 0.05
 ASA24, adjustedc 0.61b 0.07 0.78b 0.09 0.73b 0.07 0.68b 0.08
 FR, singled 0.41 0.05 0.42 0.05 0.66 0.04 0.62 0.03 0.42 0.04 0.45 0.04 0.70 0.04 0.65 0.03
 FR, 2d 0.53 0.06 0.48 0.05 0.80 0.04 0.68 0.03 0.53 0.05 0.51 0.05 0.82 0.04 0.70 0.03
 FR, adjustedc,d 0.75 0.09 1.00 0.06 0.72 0.08 0.98 0.05
Protein density
 FFQ, single 0.34b 0.06 0.32b 0.05 0.31 0.04 0.28 0.03 0.23b 0.06 0.23b 0.06 0.34 0.04 0.32 0.04
 FFQ, 2 0.57b 0.09 0.41b 0.06 0.46 0.06 0.34 0.04 0.33b 0.08 0.28b 0.07 0.48 0.06 0.38 0.04
 FFQ, adjustedc 1.76b 0.49 0.88 0.13 0.62b 0.16 0.84 0.11
 ASA24, single 0.09b 0.03 0.14b 0.04 0.13b 0.02 0.22b 0.04 0.11b 0.03 0.19b 0.04 0.10b 0.02 0.17b 0.03
 ASA24, 4 0.17b 0.05 0.20b 0.06 0.27b 0.05 0.32b 0.05 0.21b 0.05 0.26b 0.06 0.20b 0.04 0.24b 0.05
 ASA24, 6 0.19b 0.06 0.21b 0.06 0.30b 0.05 0.34b 0.06 0.24b 0.06 0.28b 0.06 0.22b 0.05 0.25b 0.05
 ASA24, 12 0.22b 0.07 0.23b 0.07 0.35b 0.06 0.36b 0.06 0.27b 0.06 0.30b 0.07 0.25b 0.05 0.27b 0.05
 ASA24, adjustedc 0.26b 0.08 0.41b 0.07 0.31b 0.07 0.30b 0.06
 FR, singled 0.39 0.07 0.35 0.06 0.58 0.04 0.52 0.03 0.33 0.06 0.31 0.05 0.57 0.04 0.49 0.03
 FR, 2d 0.54 0.09 0.41 0.06 0.74 0.05 0.59 0.03 0.46 0.08 0.37 0.06 0.70 0.05 0.55 0.04
 FR, adjustedc,d 0.86 0.16 1.02 0.07 0.78 0.15 0.90 0.07

Abbreviations: ASA24, Automated Self-Administered 24-Hour Dietary Assessment Tool 24-hour recall; FFQ, food frequency questionnaire; FR, food record; IDATA, Interactive Diet and Activity Tracking in AARP; MLVS, Men’s Lifestyle Validation Study; SE, standard error; WLVS, Women’s Lifestyle Validation Study.

a Attenuation and correlation factors were estimated using a measurement error model that included age and body mass index.

b Self-reported intakes were collected using online (vs. paper-based) instruments.

c Refers to attenuation factors that would pertain if repeat self-report administrations were adjusted for random error using regression calibration.

d The FR was weighed in WLVS and MLVS and unweighed in IDATA.