Among 4,768 Chinese college students, 51.17% identified as evening-type (E-type).
The mean sleep quality score for participants was 4.97±2.82, indicating varying levels of sleep difficulties.
E-type students had a higher likelihood of experiencing poor sleep quality, with an odds ratio (OR) of 1.866.
E-type was associated with longer sleep latency (OR=1.436) and shorter sleep duration (OR=2.149).
Increased daytime dysfunction was also linked to E-type status, with an OR of 1.602.
Overall, 18.2% of the students reported poor sleep quality.
Simplified
OBJECTIVES: To describe the prevalence of and sleep quality among Chinese college students and explore the relationship between chronotype and sleep quality.
DESIGN: A cross-sectional study.
SETTING: Four colleges and universities in Anhui, China, between November and December 2020.
PARTICIPANTS: A total of 4768 college students were recruited using a stratified, multistage, cluster sampling survey.
OUTCOME MEASURES: Morningness-Eveningness Questionnaire 19 was used to determine the chronotype of the students and the (PSQI) was used to measure their sleep quality. The multiple logistic regression model was used to explore the potential association between chronotype and sleep quality.
RESULTS: The self-reported proportions of evening-type (E-type), neutral-type and morning-type among college students were 51.17%, 45.14% and 3.69%, respectively. The mean PSQI score was 4.97±2.82 and the prevalence of poor sleep quality was 18.2%. After adjusting the covariates by multiple logistic regression analysis, E-type was positively associated with subjective sleep quality (OR=1.671, 95% CI 1.414 to 1.975), sleep latency (OR=1.436, 95% CI 1.252 to 1.647), sleep duration (OR=2.149, 95% CI 1.506 to 3.067), habitual sleep efficiency (OR=1.702, 95% CI 1.329 to 2.180), daytime dysfunction (OR=1.602, 95% CI 1.412 to 1.818) and overall poor sleep quality (OR=1.866, 95% CI 1.586 to 2.196).
CONCLUSIONS: College students mainly exhibited E-type, and an elevated prevalence of poor sleep quality existed among these students. The E-type was positively associated with poor sleep quality.
Key numbers
51.17%
E-type Prevalence
Percentage of students classified as E-type .
18.2%
Poor Sleep Quality Prevalence
Overall percentage of students reporting poor sleep quality.
4.97±2.82
Mean Score
Average score indicating sleep quality level.
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