Objective: To explore the nonlinear dynamic effects of social capital, adverse childhood experiences (ACEs) and depressive symptoms on suicidal behavior among vocational high school students, so as to provide theoretical basis and practical references for formulating suicide prevention strategies. Methods: A convenience sampling method was employed to include 668 students from a vocational high school from Wuhan in March 2023. Social capital was used as the asymmetry variable, while ACEs and depressive symptoms were used as bifurcation variables, a cusp catastrophe model was constructed to analyze the nonlinear changes in suicidal behavior among vocational high school students, and its fit was compared with linear and Logistic regression models. Results: Among students in the health vocational high school in Wuhan, only suicidal ideation accounted for 8.5%, only suicide attempt for 18.6%, neither accounted for 31.9%, and both for 41.0%. Gender, left behind experience, family economic status, parental parenting styles, depressive symptoms, social capital, and ACEs were all related factors influencing suicidal behavior among vocational high school students ( χ 2/H=19.03, 13.33, 21.11, 46.70, 144.38, 24.61, 118.77, all P <0.05). Violin plots showed a bimodal distribution of suicidal behavior, indicating nonlinear variation characteristics. The cusp catastrophe model results showed that social capital was negatively correlated with suicidal behavior, but the relationship was bifurcated by ACEs ( α social capital = -0.006 , β ACEs =0.075) and depressive symptoms ( α social capital =-0.013, β depressive =0.028) (all P <0.05). When both ACEs and depressive symptoms coexisted, the impact of ACEs was stronger ( β ACEs =0.077, β depressive =0.014) (both P <0.05). The cusp catastrophe model fitted ( R 2=0.886, 0.881, 0.882) better than the linear ( R 2=0.258, 0.219, 0.258) and Logistic regression models ( R 2= 0.242, 0.211 , 0.176). Gender stratified analysis results showed that bifurcation effect of ACEs was stronger in males than in females( β boys =0.224, β girls =0.086); in females, both ACEs and depressive symptoms had a bifurcation effect, with the former showing a stronger effect ( β ACEs =0.062, β depressive =0.015) (all P <0.05). Conclusions Suicidal behavior among vocational high school students exhibits nonlinear characteristics. Improving social capital to reducing ACEs and depressive symptoms may contribute to decreasing adolescent suicidal behaviors.

Objective:To investigate the relationship between screen time and content, and the mental health status of adolescents. The findings will inform the formulation of targeted intervention policies to enhance adolescent mental health.Methods:Between September and November 2023, 5 197 students from 64 junior high, senior high, and vocational schools across 13 districts in Wuhan were recruited, using the stratified whole-cluster random sampling to investigate their screen behavior and mental health status. Mental health status was measured using the Mental Health Inventory for Chinese Middle School Students (MMHI-60). A generalized additive model was used to explore the nonlinear association between screen time and mental health status. Additionally, a mixed-effects model was utilized to explore the dose-response associations between average daily total screen time, screen time for different content types, and adolescents' mental health status and the impact of the proportion of different screen contents on mental health outcomes.Results:The age of the participants was (14.40±1.48) years, with 56.07% being boys. The MMHI-60 score averaged 1.73±0.70. The M( Q1,Q3) for daily total screen time was 50.00 (0.00,128.57) minutes. The M( Q1,Q3) for screen time dedicated to gaming, studying, socializing, and watching videos were 0.00 (0.00, 20.00), 8.57 (1.64, 44.50), 4.28 (0.00, 30.00), and 0.00 (0.00, 25.71) minutes, respectively. A non-linear association was observed between average daily screen time and adolescent mental health problem score, 0-1 hour of daily screen time was beneficial for adolescent mental, compared to no screen time. However, screen time exceeding 1 hour was detrimental, with the negative impact increasing alongside screen time duration. When total daily screen time was held constant, the proportion of time spent on gaming ( β=0.14, 95% CI: 0.05-0.23, P=0.003) and video ( β=0.21, 95% CI: 0.09-0.28, P<0.001) was positively correlated with mental health problems, whereas the proportion of time spent on studying was negatively correlated with mental health problems ( β=-0.17, 95% CI: -0.24 - -0.11, P<0.001). Conclusions:Moderate screen time is advantageous for adolescent mental health. However, it is crucial to minimize the proportion of screen time dedicated to video and gaming activities to mitigate potential adverse effects.

Objective: To explore the association between the Internet usage characteristics and suicidal ideation among vocational high school students, so as to provide a theoretical basis for precise intervention of suicide among vocational high school students. Methods: A total of 1 781 students were recruited from three vocational high schools in Wuhan and Xianning in March 2023 by using the cluster random sampling method. The Columbia-Suicide Severity Rating Scale and Revised Chen Internet Addiction Scale were used to measure suicidal ideation and Internet addiction, respectively. LASSO regression model was used to select influential factors related to suicidal ideation, and the gradient boosting decision tree algorithm XGBoost was used to develop prediction models and evaluate predictive performance. By calculating the SHAP values, the contribution of each influential factor was quantified. Results: The prevalence of suicidal ideation among vocational high school students was 42.22% and prevalence of Internet addiction was 26.39%. LASSO regression results indicated that age, gender, experience of being left behind, parental relationship, holding a class cadre position, using the Internet for learning, Internet use during dawn, morning and late night, Internet addiction, and depressive symptoms were all the influential factors of suicidal ideation among vocational high school students ( β= -0.05 , 0.29, 0.09, 0.27, 0.10, -0.01, 0.09, 0.05, 0.24, 0.28, 0.78, all P <0.05). The AUC of the prediction model was 0.75. The results based on SHAP values indicated that all influential factors identified through multivariate analysis contributed positively to the model predictions ( SHAP >0). Among these, depressive symptoms and parental relationship had the greatest impact on suicidal ideation ( SHAP =0.77, 0.26), and the joint effect of features with higher contribution could improve the prediction probability. Conclusions Depressive symptoms, parental relationships, Internet addiction, and time of Internet use are most important risk factors of suicidal behaviors for vocational high school students. Thus, effective interventions should be conducted to reduce their suicidal ideation.

Objective:To investigate the relationship between screen time and content, and the mental health status of adolescents. The findings will inform the formulation of targeted intervention policies to enhance adolescent mental health.Methods:Between September and November 2023, 5 197 students from 64 junior high, senior high, and vocational schools across 13 districts in Wuhan were recruited, using the stratified whole-cluster random sampling to investigate their screen behavior and mental health status. Mental health status was measured using the Mental Health Inventory for Chinese Middle School Students (MMHI-60). A generalized additive model was used to explore the nonlinear association between screen time and mental health status. Additionally, a mixed-effects model was utilized to explore the dose-response associations between average daily total screen time, screen time for different content types, and adolescents' mental health status and the impact of the proportion of different screen contents on mental health outcomes.Results:The age of the participants was (14.40±1.48) years, with 56.07% being boys. The MMHI-60 score averaged 1.73±0.70. The M( Q1,Q3) for daily total screen time was 50.00 (0.00,128.57) minutes. The M( Q1,Q3) for screen time dedicated to gaming, studying, socializing, and watching videos were 0.00 (0.00, 20.00), 8.57 (1.64, 44.50), 4.28 (0.00, 30.00), and 0.00 (0.00, 25.71) minutes, respectively. A non-linear association was observed between average daily screen time and adolescent mental health problem score, 0-1 hour of daily screen time was beneficial for adolescent mental, compared to no screen time. However, screen time exceeding 1 hour was detrimental, with the negative impact increasing alongside screen time duration. When total daily screen time was held constant, the proportion of time spent on gaming ( β=0.14, 95% CI: 0.05-0.23, P=0.003) and video ( β=0.21, 95% CI: 0.09-0.28, P<0.001) was positively correlated with mental health problems, whereas the proportion of time spent on studying was negatively correlated with mental health problems ( β=-0.17, 95% CI: -0.24 - -0.11, P<0.001). Conclusions:Moderate screen time is advantageous for adolescent mental health. However, it is crucial to minimize the proportion of screen time dedicated to video and gaming activities to mitigate potential adverse effects.

BACKGROUND: Men who have sex with men (MSM) have become a high risk population of HIV infection due to their risky sexual behaviors. The latent pattern of psychosocial characteristics plays an important effect in HIV-related risky behaviors among HIV-negative MSM. METHOD: Participants were recruited from Wuhan, Nanchang, and Changsha city from September 2017 to January 2018. Social support was assessed by the multidimensional scale of social support, Connor-Davidson Resilience scale-10 items for reliance, the assessment of Stigma towards Homosexuality for sexual minority stigma, the Likert subscale of nondisclosure for identity concealment, the ACE questionnaire-Kaiser-CDC for adverse childhood experience, the Centers for Epidemiological Studies Depression Scale for depression. Latent profile analysis (LPA) and multivariate regression were used to analyze the data. RESULTS: Three psychosocial characteristic patterns were revealed by the LPA. "Social support and resilience group" (SR group), "Identity concealment group" (IC group) and "Adverse childhood experience" (ACE group) were identified, respectively. In comparison with "SR group", "IC group" have a higher likelihood of one-night male partners (AOR = 2.74, 95%CI = [1.54, 4.90]), both fixed and one-night male partners (AOR = 2.01, 95%CI = [1.34, 3.01]) and HIV-unsure male partner (AOR = 2.12, 95%CI = [1.44, 3.13]). Similarly, "ACE group" were more likely having inconsistent condom use (AOR = 2.58, 95%CI = [1.41, 4.73]), and having sex with HIV-positive male partner (AOR = 4.90, 95%CI = [1.95, 12.30]) with comparison of "SR group". In addition, we further revealed that "ACE group" had a higher ratio (90.0%) of inconsistent condom use among MSM whose male partners were HIV-positive. CONCLUSIONS Six important psychosocial factors were divided into three latent pattern classes. Compared with "SR group", "IC group" and "ACE group" were more likely to engage in HIV-related risky sexual behaviors. Further research may pay more attention to "IC group" and "ACE group" for targeted intervention.
Humans ; Male ; HIV Infections/epidemiology* ; Homosexuality, Male/psychology* ; Risk Factors ; Sexual and Gender Minorities/psychology* ; Sexual Behavior/psychology*

Objective: To understand poor oral habits of preschool children and related factors, so as to provide evidence for child oral health promotion. Methods: A total of 3 094 preschool children from 12 kindergartens in Wuhan and Ezhou were selected by cluster sampling method. Basic demographic information and child poor oral habits were evaluated through questionnaire survey. Chi square test was used for univariate analysis and binary Logistic regression was performed for multivariate analysis. Results: About 33.5% of preschoolers were found to have poor oral habits. Among them, biting nails and toys (4.4%), sucking fingers ( 3.8% ), mouth breathing (3.7%) ranked the highest. Multivariate analysis showed that only child( OR =1.26), picky eaters( OR =1.30), and exposure to second hand smoke ( OR =1.69) were associated with poor oral habits, while living in cities( OR =0.58), high family economic status ( OR =0.66), and good health ( OR =0.37), balanced diet ( OR =0.71), maternal high school education ( OR =0.72) were associated with better oral habits( P <0.05). Conclusion Preschool children s oral habits are affected by variable factors, attention should be paid to children who are the only child of the family, picky eaters, living in rural areas, and those exposed to second hand smoke.

Objective To analyze the psychological and behavioral status and influencing factors of college students during the epidemic of COVID-19 in Wuhan. Methods The students from two universities in Wuhan area were selected by stratified cluster sampling, and the self-designed questionnaires were used to conduct the online survey. Statistical analysis was performed using SPSS 22.0. Results Among 3 966 college students surveyed in this study, the proportion of students in Wuhan who thought that their own infection probability was higher than others (11.25%), that their family members were more likely to be infected (15.29%), that they were very worried about their own infection (22.93%), that they were very worried about the infections in the same community (25.27%), and that their own infection risk was higher than others (9.77%), was higher than those of students in other three regions. The total incidence of depression was 27.10%. Multivariate logistic regression analysis showed that the humanities and social science majors living in the city, worrying about the infection of themselves and their families, feeling that they had a higher chance of infection than other, being not optimistic about the epidemic situation, and thinking that the infection had a great impact on people's emotions were the risk factors of depression during the epidemic. Conclusion College students in Wuhan had psychological and behavioral problems during the COVID-19 epidemic. These problems were related to whether they were located in the epidemic area and whether they were worried about infections.

Objective To investigate the perceived discrimination and its influencing factors among people living with HIV/AIDS (PLWHA).Methods PLWHA subjects met the criteria and treated in the Second Hospital of Nanjing were enrolled in this study.Self-designed questionnaire was adapted to investigate PL-WHA subjects for sociodemographic data,and the perceived discrimination was investigated via the the modified HIV stigma scale-revision scale.Results A total of 465 PLWHA subjects were investigated,the average age was (37.22±12.01) years old,and most of them were male (95.1％).50.3％ of the PLWHA subjects were homosexual,24.5％ of them were bisexual/unsure.The average score of perceived discrimination was (81.25±12.69) points,25.2％ (117 cases) of the PLWHA subjects had high level of perceived discrimination (≥88 points),74.8％ (348 cases) of them had low level of perceived discrimination (＜88 points).The multi-ple regression analysis showed that marital status,sexual orientation,social support and self-esteem were influencing factors for perceived discrimination.Conclusion Perceived discrimination commonly exists in PL-WHA subjects,and is influenced by many social and psychological factors.

Objective This present study was to examine the prevalence and determinants of one-night-stand behavior among young men who have sex with men (YMSM).Methods A total of 403 YMSM aged 16 to 25 were recruited through internet promotion,extending activity and HIV VCT in Wuhan.Data was gathered through anonymous questionnaire.Binary logistic regression was used to examine factors associated with one-night-stand behavior.Results Of the 398 YMSM,48.99％ (195/ 398) reported having had casual sex in the last 6 months.Of the ones having had casual sex,34.29％ (60/175) and 28.65％ (49/171) reported using condoms consistently during anal or oral sexual contacts,respectively.These figures were lower than those of YMSM not having casual sexual contacts [with anal sex as 49.08％ (80/163) and oral sex as 38.85％ (61/157)].76.80％ (149/194) of the YMSM reported having had multiple sexual partners,with the figure higher than those without [33.15％ (60/ 181)] (P＜0.01).Results from the logistic regression analysis showed that the following factors seemed to be associated with casual sex activities among YMSM,including:often using intemet,(OR=4.89,95％ CI:1.90-12.54),taking illegal drugs (OR=2.72,95％ CI:1.60-4.63).Conclusions YMSM who bad engaged in casual sex,practicing unprotected sex or having multiple sexual partners,were recognized as high risk population.Targeted intervention programs are needed to decrease the one-night-stand behavior.Internct intervention strategy seemed an important method to serve the purpose.

Objective To understand the hypertension prevalence situation and its associated factors among residents in Hu‐bei Province to provide a reference basis for preventing and controlling residents′ hypertension .Methods The residents aged 15 years old or more were sampled from 20 counties (cities and districts) by adopting the multi‐staged stratified cluster sampling .The unified questionnaire was adopted to conduct the face to face interview by entering home .The multivariate Logistic regression was used to analyze the influencing factors of hypertension .Results A total of 28 555 respondents were investigated ,4 135 respondents reported hypertension and the hypertension prevalence rate was 14 .48% .The hypertension prevalence rate in urban residents was 18 .41% ,which was higher than 11 .71% in rural residents(P<0 .01) .The prevalence rates in males and females were 14 .10% and 14 .83% respectively ,showing no statistically significant difference between males and females (P>0 .05) .The multivariate Logistic regression results revealed that the risk of hypertension was increased with age ;compared with job‐hololers ,the retired(OR=1 .44 , 95% CI:1 .25-1 .65)and the unemployed(OR=1 .29 ,95% CI:1 .15-1 .46)had more possibility to suffer from hypertension ;higher income earners had lower risk of hypertension ;obese people(OR=3 .09 ,95% CI:2 .63~3 .63)and diabetes(OR= 3 .87 ,95% CI:3 .30-4 .52)were more likely to suffer from hypertension .Conclusion The prevalence rate of hypertension among residents aged 15 years old or more in Hubei Province presents the increasing trend ,which needs the corresponding departments and institutions to adopt the measures to actively prevent and control hypertension .