Vegetarians have an indirect positive effect on sleep quality through depression condition

Area of Science:

• Nutrition Science
• Sleep Medicine
• Psychiatry

Background:

• Dietary patterns significantly influence overall health and well-being.
• Vegetarian diets are increasingly popular, prompting research into their health implications.
• The relationship between diet, mental health, and sleep quality requires further investigation.

Purpose of the Study:

• To assess the association between a vegetarian diet and sleep quality in Chinese adults.
• To explore potential contributing factors, including depression, to the diet-sleep quality relationship.
• To compare sleep quality and depression levels between vegetarians and omnivores.

Main Methods:

• A cross-sectional study involving 280 vegetarians and 280 matched omnivores from Shanghai.
• Sleep quality assessed using the Pittsburgh Sleep Quality Index (PSQI).
• Depression assessed using the Center for Epidemiologic Studies Depression Scale (CES-D).
• Dietary intake evaluated via semi-quantitative food frequency questionnaires (SQFFQ).
• Statistical analyses included multi-linear and logistic regression.

Main Results:

• Vegetarians exhibited significantly better sleep quality (lower PSQI scores) and lower depression scores (CES-D) compared to omnivores.
• The difference in sleep quality between groups became insignificant after adjusting for depression.
• Depression was positively associated with poorer sleep quality and increased risk of sleep disorders.
• Vegetarians reported higher self-satisfaction with their sleep.

Conclusions:

• A vegetarian diet may enhance sleep quality, potentially by moderating mental health, specifically depression.
• Depression is a significant factor influencing sleep quality in both dietary groups.
• Further research is warranted to elucidate the mechanisms linking vegetarian diets, mental health, and sleep.