Abstract: Objective To investigate the correlation of body composition and dietary habits to the sleep quality of students in a university of traditional Chinese medicine in Beijing, and to provide evidence for improving sleep quality in this group. Methods From October to November 2021, a stratified random sampling method was adopted to randomly select students from a medical university in Beijing. An electronic questionnaire was used to collect their general information, dietary habits, and sleep quality, and body composition was measured on-site. Spearman correlation was used to analyze the relationship between sleep quality, dietary habits, and body composition. Results Among 235 medical students surveyed, 55 （23.40%） had poor sleep quality, among which 42 （76.36%） were female students, and thin students accounted for the most （52.73%）. The sleep quality of students of different majors, genders, and body types was statistically significant （all P<0.01）. Sleep frequency, daytime dysfunction 1, and daytime dysfunction 2 were related to body type （P<0.05 or P<0.01）, and the obese type had the highest score. Sleep quality score was negatively correlated with vegetables, fruits, beans, and breakfast （P<0.05 or P<0.01）, and positively correlated with livestock and poultry meat, fried food, night snack, coffee, carbonated beverage, fruit juice, alcoholic beverage, chocolate （P<0.05 or P<0.01）. Conclusions Sleep quality is related to body composition and dietary habits. By correcting bad dietary habits to reduce body fat percentage and improve body shape, sleep quality may be improved.

Key words: Sleep quality, Body composition, Dietary habit, Correlation