(1) Background: During the past 3 years, the COVID-19 pandemic has severely affected the normal school schedule of college students, jeopardizing their mental health, sleep quality, and interpersonal relationships. However, previous studies have focused on the dimension of social support received, and few studies have measured in depth the association of support received from family on adolescents' physical and mental health. Therefore, this study explored the associations between family support received by Chinese college students during COVID-19 pandemic online classes, stress and sleep quality, and the mediating role of stress. (2) Methods: A cross-sectional study conducted at Chongqing Medical University recruited 712 college students through a university-wide incidental random sample using the Questionnaire Star platform. Statistical description and correlation analysis was conducted using SPSS 25.0, and structural equation modeling was constructed using AMOS 22.0 to test for mediating effects; (3) Results: The family support score of college students during the COVID-19 pandemic online course was 19.41 ± 4.62. Correlation analysis showed that sleep quality was negatively correlated with family support (r = −0.224, p < 0.01), positively correlated with stress (r = 0.324, p < 0.01), and family support was negatively correlated with stress (r = −0.159, p < 0.01). The results of structural equation modeling showed that stress partially mediated the relationship between family support and sleep quality among college students (indirect effect = −0.150, p < 0.01, SE = 0.013,95% CI = [−0.208, −0.064]). The model R2 was 36.4%. (4) Conclusions: Schools should consider implementing sleep education, and stress relief curriculum measures to improve the quality of students' sleep, and should focus on the role that family plays during online classes. This will help students overcome the negative emotional effects of stress in the COVID-19 pandemic and improve their learning efficiency and physical and mental health.

Background As the global population is aging, China has also entered an aging society at this stage. Numerous studies have shown that sleep disorders and mental health problems are more serious in the elderly compared to adults. This study aims to explore the effects of living patterns on the sleep duration and mental health status of older adults in China. Methods A total of 5,899 participants from the China Health and Retirement Longitudinal Study 2018 baseline study were included in this study. Data were statistically analyzed using SPSS version 25.0, and logistic regression models were used to analyze the effects of two living patterns, living with and without children, on sleep duration, and mental health of older adults. Results This study shows not living with children were significant for napping 31–60 min/day and > 60 min/day (OR = 1.137,P < 0.05; OR = 1.185,P < 0.05), indicating that most older adults can get longer naps without living with children. The findings of short sleep (< 7h/day) were significant when not living with children (OR = 0.896, P < 0.05). Different living patterns were positively correlated with depressive symptoms (OR = 1.139, P < 0.05), indicating that compared with "not living with children", "living with children" had a lower depression score and was less likely to acquire depressive symptoms; Not significant in happiness, life satisfaction, no correlation can be drawn. Conclusions Living patterns were significantly associated with sleep duration, mental health status of Chinese older adults.

Sleep disorders, which are prominent problems among college students, may be associated with skipping breakfast. Therefore, we aimed to explore the role of sleep chronotypes and depressive symptoms as mediators in the relationship between breakfast frequency and sleep quality. A cross-sectional survey enrolling random samples of 712 college students was conducted by the Questionnaire Star online platform. Statistical description and correlation analysis were performed by SPSS 25.0, and a chain mediation test was performed by model 6 in PROCESS 3.5. The result of the article demonstrated that breakfast frequency can affect sleep quality through two mediating pathways: ① sleep chronotypes, with a mediating effect of 32%; and ② depressive symptoms, with a mediating effect of 52.4%. However, the chain mediating effects of sleep chronotypes and depressive symptoms was not significant, and neither was the direct effect of breakfast frequency on sleep quality. Breakfast frequency can indirectly affect sleep quality by adjusting sleep chronotypes and depressive symptoms. Regular breakfast can increase morning and intermediate sleep chronotypes, reduce depressive symptoms, and thus improve sleep quality.