The accuracy of portion size estimation using food images and textual descriptions of portion sizes: an evaluation study.

ABSTRACT:

Background

Inaccurate self-report of portion sizes is a major cause of measurement error in dietary assessment. To reduce this error, different portion size estimation aids (PSEAs) have been developed, including food images (image based, IB-PSE) and textual descriptions of portion sizes (text-based, TB-PSE). We assessed the accuracy of portion size estimation by IB-PSE and TB-PSE.

Methods

True intake of one lunch was ascertained in forty participants. Self-reported portion sizes were assessed after 2 and 24 hours by means of TB-PSE and IB-PSE, in random order. Wilcoxon's tests were used to compare mean true intakes to reported intakes. Moreover, proportions of reported portion sizes within 10% and 25% of true intake were assessed. An adapted Bland-Altman approach was used to

SUBMITTER: Lucassen DA 

PROVIDER: S-EPMC9291996 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature