Validity and reliability of a dish-based semi-quantitative food frequency questionnaire for assessment of energy and nutrient intake among Iranian adults.

Azam DoustmohammadianMaryam AminiAhmad EsmaillzadehNasrin OmidvarMitra AbtahiMonireh Dadkhah-PiraghajBahareh NikooyehTirang R Neyestani

Published in: BMC research notes (2020)

ICC for reliability ranged between 0.42 and 0.76. De-attenuated CC for the FFQ and the 24-h recalls ranged between 0.13 and 0.54 (Mean = 0.38). The de-attenuated CC between the DFFQ and plasma levels of retinol and beta-carotene were 0.58 (P = 0.0001) and 0.40 (P = 0.0001), respectively. Cross-classification analysis revealed that on average 73% were correctly classified into same or adjacent quartiles and 5% were classified in opposite quartiles.

Keyphrases

machine learning
deep learning
high resolution
cross sectional
psychometric properties
weight gain
human health
mass spectrometry
patient reported