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Short sleep duration is associated with poor diet as measured by the Adapted Healthy Eating Index: a cross-sectional study with Brazilian shift workers


Insufficient sleep has been associated with negative alterations in food intake. However, studies analysing this association in shift workers, as individuals who are known to be predisposed to obesity and present short sleep duration, are in fact scarce in the literature.


To evaluate the associations between diet quality and sleep duration in 1,215 poultry processor shift workers.


The diet quality was estimated by the Adapted Healthy Eating Index (AHEI) using a validated food frequency questionnaire validated for Brazilian adults. The bedtime and wakeup time during workdays and days off were obtained, and average sleep duration (hours) was calculated by the equation: sleep duration on workdays × number of workdays plus sleep duration on free days × number of free days /7. We grouped average sleep duration into two categories: > 6 and <6 hours/day, defined as short sleep. Poisson regression were with robust variance was performed and adjusted for potential confounding variables in order to verify the association between sleep duration and poor diet.


The AHEI median scoring criterion was were 69.2 (Interquartile range – IQR: 60.3–82.3) and 53% (n=644) of the workers with a poor diet quality. An association was found between short sleep duration both in free days as well as weekly average sleep duration, and poor diet quality (Adjusted Prevalence Ratio - APR) : 1.12; 95%CI: 1.02, 1.24; p=0.016; APR:1.14; 95%CI: 1.01,1.28; p=0.028, respectively).


Short-sleep workers show a greater prevalence to poor diet intake as detailed on the AHEI.


diet quality; poor diet; shift work; sleep duration


Área Básica


Faculdade de Medicina - Minas Gerais - Brasil, Instituto de Biotecnologia, Universidade Federal de Goiás - Goias - Brasil


Graciele Cristina Silva, Laura Cristina Tibiletti Balieiro, Rafael Alves Guimarães, Tássia do Vale Cardoso Lopes, Cibele Aparecida Crispim