Analysis of the Mediating Effect of Risk Perception on the Relationship Between Time Perception and Mental Health of College Students During the COVID-19 Epidemic.

Background: COVID-19 has had a wide impact on the mental health of college students. This study aims to explore the relationship between time perception, risk perception, and the mental health of college students during COVID-19 through a questionnaire survey. Subjects: One thousand two hundred and eighteen college students, 449 male and 769 female, who studied online during the COVID-19 epidemic were selected. Methods: Time Perception Scale, Risk Perception Scale, and SCL-90 were used to investigate the relationship using correlation analysis. Results: During the COVID-19 period, mental health problems of college students were widespread, and 65.93% of college students reported moderate to severe mental health problems. The correlation analysis showed that risk perception, time perception, and the mental health of college students were significantly related. Risk perception played a partial mediating role between present enjoyment and mental health, and risk perception played a partial mediating role between future time perception and mental health. Conclusion: In the case of sudden public crises, we should pay close attention to the mental health of college students, adjust their attitude toward the present and the future, and pay attention to their perception of risk so as to improve their mental health level under crisis.

[Research based on 3MRA model about the risk assessment methods and applications of the landfill waste].

Seven major contaminations of the landfill were selected from northeast of China, and the migration and transformation of contaminations environmental medias were studied by using the multimedia multipathway and multireceptor risk assessment (3MRA) model. The results show, the order of the radical concentration of the seven contaminations is Ni2+ > Benzene > Cd > Pb > Cr6+ > As > Hg. The radical concentration of benzene, As and Hg in human is similar to that of ecology, respectively. The radical concentration of Cd and Ni2+ in human is higher than that of ecology, while the radical concentration of Cr6+ in ecology is higher than that of human. The risk and hazard quotient of the groundwater in the landfill is 5.06 x 10(-7), 2.3 x 10(-1), respectively.

An investigation on the epidemic situation of intimate partner violence in 2575 college students / 中华流行病学杂志

Objective To investigate the prevalence of love affairs and intimate partner violence,and to explore the relationship between intimate partner violence and other mental health and risk behavior in college students.Methods Three universities were selected using cluster sampling method in Hefei and Wuhu.Totally.2575 college students completed an anonymous questionnaire.Intimate partner violence,depression,satisfaction of school life,self-esteem,suicidal psychology and behavior were evaluated to estimate the relationship between intimate partner violence and mental health/risk behavior.Results There were 46.9%students reported that they had intimate partner currently or in the past.The rate of having intimate partner in male students was higher than that in female students(x2=44.13,P<0.001).And the rates were higher in sophomores and juniors than in freshmen(x2=161.84,P<0.05).There were 21.1% students had sexual behavior with their intimate partners.But only 21.8%(34/156)intimate partners reported that they used condom every time.There were 11.5%(18/156)intimate partners reported that they never took any contraception.There were 18.6%(29/156)students reported that they were pregnant or led to their girlfriend becoming pregnant,but only less than 50.0% adolescents induced abortion in a legal hospitals.The rates of being the victim of physical assault,emotional abuse,sexual coercion,the total intimate partner violence were 18.0%,33.6%,5.1%.37.1%.The rates of being the victim of physical assault,emotional abuse,total intimate partner violence in male adolescents were higher than those in female adolescents,but the rate of sexual coercion was on the contrary(x2=70.21,13.25,14.04,5.77,P<0.05).Among the intimate partners who had suffered from intimate partner,74.2%(345/446)students had underwent more than 3 times.and 47.1% had underwent more than 2 types of intimate partner violence.The score of depression was highest in the victims of intimate partner violence,but the scores of self-esteem and school life satisfaction were on the contrary(F=4.00,16.39,8.76,P<0.05).The rates of suicidal ideation,suicidal plan,suicidal preparative and attempted suicide were highest in the victims of intimate partner violence(x2=13.80,9.72,8.52,11.96,P<0.05).Conclusion The rate of having sexual behavior with their intimate partners was high in college students,but their self-protection awareness was insufficient.In the present study,a high prevalence of intimate partner violence among university students was observed,and highlighted a need for attention to the other mental health and risk behavior in adolescents with intimate partner violence.

'Life Satisfaction' as a moderator or mediator of accommodation category and loneliness for rural school students / 中华流行病学杂志

Objective To examine life satisfaction as a moderator or mediator of accommodation category and loneliness for elementary and middle school students in rural areas so as to provide evidence for psychological health intervention among said students. Methods All participants were asked to complete an anonymous questionnaire battery which including an 18-item General Health Questionnaire, Children' s Loneliness Scale and Multidimensional Students' Life Satisfaction. Results The average score of loneliness scale (35.0±9.5) among boarding-school students was significantly higher than those students living at home (33.1±10.1 ) (P<0.01). The average scores on school-satisfaction (33.5±6.3), friend-satisfaction (42.1±6.2) and self-satisfaction (32.4±5.0) of boarding-school students were significantly higher than those students living at home (35.9±6.6, 42.9±6.6,32.9±5.3 ) ( P< 0.05 ). The association between accommodation category and loneliness was fully mediated by school-satisfaction (the standardized coefficients of loneliness was reduced from 0.043 (P<0.05) to 0.021 (P>0.05) and partly mediated by self-satisfaction and friend-satisfaction. Data through Moderation analyses indicated that self-satisfaction, school-satisfaction and friend-satisfaction did not serve as moderators. Conclusion Accommodation category, life satisfaction seemed to be good predictors on loneliness among elementary and middle school students and the fully mediated effect of school-satisfaction between accommodation category and loneliness was significant, suggesting that intervention of loneliness should focus on these variables.

Features of ischemic myocardial contracture after asphyxia-induced cardiac arrest in rats / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the features of ischemic myocardial contracture after asphyxial cardiac arrest in rats.</p><p><b>METHOD</b>Asphyxial cardiac arrest was induced in 8 Wistar rats, and the length and width of the heart were measured at the different time points after cardiac arrest.</p><p><b>RESULTS</b>Obvious ischemic myocardial contracture occurred after the cardiac arrest, reaching the maximal contracture at 4-6 min after the arrest.</p><p><b>CONCLUSIONS</b>Ischemic myocardial contracture induced by asphyxia may be an important factor affecting the outcome of cardiopulmonary resuscitation.</p>