Abstract
No study has used trajectories of dietary patterns to examine their effects on sleep duration and body mass index over time in the Chinese population. We analyzed data from adults participating in the China Health and Nutrition Survey between 1991 and 2009. Dietary intake was measured by a 24-h recall method over three consecutive days. Height and body weight were measured, and sleep duration was self-reported. Multivariable mixed linear models were applied to examine the association between trajectories of dietary patterns (using a latent class model) and sleep duration as well as BMI. Four trajectories of a traditional pattern (characterized by rice, meat, and vegetables) and three trajectories of a modern pattern (characterized by fast food, milk, and deep-fried food) were identified. Participants with a high and rapid increase trajectory of the modern dietary pattern had the shortest sleep duration (β = −0.26; 95% CI: −0.40, −0.13). Participants with a high and stable intake of the traditional dietary pattern had the lowest BMI (β = −1.14; 95% CI: −1.41, −0.87), while the participants with a high and rapid increase trajectory of the modern dietary pattern had the highest BMI (β = 0.74; 95% CI: 0.34, 1,15). A rapid increase in the modern dietary pattern is associated with shorter sleep duration and higher BMI.
Highlights
Short sleep duration and poor sleep quality are associated with increased cardiometabolic risks such as obesity and diabetes [1]
We identified two dietary patterns, named traditional and modern dietary patterns
We found that a high and rapid increase of the modern dietary pattern was associated with shorter sleep duration but higher BMI
Summary
Short sleep duration and poor sleep quality are associated with increased cardiometabolic risks such as obesity and diabetes [1]. Short sleep duration is prevalent worldwide [2,3]. In China, approximately a quarter of community-dwelling adults aged 60 years and above reported sleep durations of ≤6 h per day [4,5]. These numbers are comparable to developed countries, but the mechanism of short sleep and association with related chronic conditions such as obesity have not been thoroughly studied in the Chinese population. As suggested by previous studies, compared to normal sleepers, short sleepers are more likely to have higher energy
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