Objective: To explore the effectiveness eye caring theme based intervention model in the improvement of students’ vision, and to provide a systematic method for pupils’ visual intervention. Methods: A total of 965 students in the same grade of the three schools were divided into intervention group(482) and control group(483) at a 1∶1 ratio match. The intervention group received a one year intervention through the design of the series of eye caring theme activities, and the control group did not receive any intervention. Results: The mean values of visual related knowledge literacy improvement in the intervention group and the control group were 7.08 and 2.18, respectively, with a significant difference( t =92.18, P <0.05); The mean values of improvement of vision related belief literacy in the intervention group and the control group were 7.88 and 4.57, respectively, and the difference was statistically significant( t =45.57, P <0.05); The mean values of visual related behavior literacy improvement in the intervention group and the control group were 17.41 and 2.21. The differences were statistically significant( t =117.37, P <0.05); The mean values of total vision improvement in the intervention group and the control group were 10.80 and 2.99, respectively, and the differences were statistically significant( t =87.74, P <0.05); The mean values of the parents’ improvement in children’s vision health care in the intervention group and the control group were 13.33 and 0.80, respectively, and the difference was statistically significant( t =128.76, P <0.05); The mean values of visual acuity reduction in the intervention group and the control group were 0.07 and 0.71, respectively, and the differences were statistically significant( t =128.00, P <0.05). Conclusion Theme based intervention can improve students’ visual literacy, especially visual behavior literacy, and can effectively slow down the deterioration of students’ vision.

Objective: To investigate the level of preschool children’s weekend screen time in Zhejiang Province, and to explore family related factors. Methods: A total of 6 829 preschool children were selected from 25 kindergartens in Zhejiang Province from March to April 2019. Through a questionnaire survey among their caregivers, relevant data and information such as children’s screen time and family related factors were obtained. Result: The report rate of children in different age groups whose average screen time per day on weekends ≥2 h/d: boys were higher than girls( P <0.05); and the difference between boys and girls in the age groups of 3, 3.5, 4 and 6 was statistically significant( P <0.05). At the age of 3, the lowest rate of video time ≥2 h/d report was 9.57% and 6.03% for boys and girls, while at the age of 5.5, the highest rate was 18.49% and 17.37% for boys and girls. Logistic regression analysis showed that age, boy( OR =1.33), caregiver( OR =1.42), father’s high school( OR =1.36), father’s junior high school and below( OR =1.37), and parents’ no exercise habit ( OR =1.47) were associated with high screen time during weekend( P <0.05). Conclusion Family related factors can affect children’s screen time. Parents should pay attention to children’s screen time in the process of children’s growth.

Objective: To understand the present situation of physical activity and its influencing factors, and to provide a reference for improving the level of physical activity and making the intervention measures. Methods: The method of random stratification was used to select 4 740 pre school children aged 3-6 from 17 kindergartens in 12 counties and districts of Nanchang City, The questionnaire of physical activities of young children and the questionnaire of parents of physical activities of young children were applied to conduct a survey. Results: Compared with weekday PA and MVPA, preschool children’s weekends decreased, SB increased. The differences in PA, MVPA and SB on weekdays and weekends were statistically significant( P <0.01). The proportion of PA and MVPA reaching the recommended amount during the working day of preschool children were 44.9%-59.2%, 45.4%- 61.7%.The proportion reaching the recommended amount of PA and MVPA on weekends were 24.7%-27.8%, 24.5%-29.9%, and the proportion reaching the recommended amount on weekdays was higher than that on weekends. Conclusion There is still gap between actual amount of physical activity and the recommended amount. There are different modes of activity on weekdays and weekends, and weekends are the least active periods. Parents and teachers should pay enough attention to the establishment of "social campus family" model to improve the lack of physical activity of preschool children.

Objective: To understand the current status of health related quality of life among primary and middle school students aged 9 to 15 years old in Henan Province, and to explore its relationship with negative emotions and social support. Methods: Between January and June 2016, 24 primary and middle schools were selected from 6 cities of Henan Province, and 5 867 primary and middle school students were included and completed the Pediatric Quality of Life Inventory Measurement, Stress Anxiety Depression Scale, Perceived Social Support Scale. Hierarchical linear regression analysis was used to examine the moderating effect of social support. Results: The total score of health related quality of life of primary and middle school students in Henan was (81.21±12.49). There were statistically significant differences in the quality of life among primary and middle school students with different gender, study period, family monthly income, subjective parental relationship and parental education ( P <0.05). Negative emotions were negatively correlated with quality of life ( r =-0.51, P <0.01) and social support ( r =-0.30, P <0.01), while social support was positively correlated with quality of life ( r =0.29, P <0.01). Regression analysis showed that negative emotional was negatively associated with quality of life ( β =-0.23, P <0.01), while social support was positively associated with quality of life ( β =0.16, P <0.01). The interaction of negative emotions and social support was negatively associated with quality of life ( β =-0.18, P <0.01). Conclusion Health related quality of life among 9-15 year old primary and middle school students in Henan province is satisfactory. Social support might buffer the negative impact of negative emotions including depression, anxiety and stress on quality of life of primary and secondary school students.

Objective To examine the association of health literacy (HL) and screen time (ST) with non-suicidal self-injury (NSSI) in middle school students, and to provide guidance for prevention on self-injuries in adolescents.

Objective: To analyze the situation of AIDS knowledge and discrimination among freshmen in Chengdu city, and to explore possible effects of AIDS knowledge on discrimination. Methods: A cluster random sampling was employed to investigate 1 053 college students from 11 universities in Chengdu about their HIV/AIDS knowledge and discrimination. The scores of AIDS knowledge and discrimination of students with different characteristics were analyzed, and the influence path of AIDS knowledge on AIDS discrimination were further analyzed based on different peer relationships. Results: The total scores of AIDS knowledge was negatively correlated to AIDS discrimination( r s =-0.13, P <0.01). After adjusting for confounding factors, the total score of AIDS knowledge was associated with the total score of AIDS discrimination( β =-0.12, P <0.01). AIDS knowledge played a role in AIDS discrimination in intimate, general and unfamiliar peer relationships, with standardized path coefficients of -0.20, -0.24 and -0.18 respectively( P <0.01). Conclusion AIDS knowledge are correlated with discrimination among freshmen under different peer relationships. More anti-AIDS discrimination courses should be added to AIDS education to reduce the students’ fear and stigma of HIV/AIDS patients and related risk groups.

Objective: To explore the impact of function of mobile phone use on self-perceived stress and mobile phone addiction of high vocational students, and the mediating role of coping styles between different mobile phone functions and mobile phone addiction. Methods: A total of 911 participants in two vocational colleges in Wuhan and Liaocheng were investigated by using convenient sampling method. Smartphone Usage, Simplified Coping Style Questionnaire, and Stress subscale of Depression-Anxiety-Stress Scale(short version) were administered to participants. Results: Female students scored significantly higher on mobile phone social features (4.77±1.06) than males( t =2.05， P =0.04), while males scored significantly higher on MPATS and DASS-S, Negative Coping Style subscales than females( P <0.01). The social function of the mobile phone was positively related to the positive coping styles( r =0.17, P <0.01). The game features of mobile phone were positively related to negative coping styles, stress and mobile addiction( P <0.01). Negative coping style could positively predict stress and mobile phone addiction( β =0.53, 0.50, P <0.01). Negative coping styles and stress had significant chain mediation effects in nonsocial functions and mobile phone addiction(95% CI =0.06-0.24, P <0.01). Conclusion Students of vocational college who often use cellphone not for social purpose have higher self-perceived stress. The game function of mobile phones had an adverse effect on the physical and mental health of vocational students. Negative coping style is a powerful predictor of stress and mobile phone addiction.

Objective: To explore the changes of awareness of tuberculosis and access to tuberculosis-related information among students in Zhejiang Province. Methods: There were 554 students younger than 30 y were included in the study during April to sept. of 2014 and during sept. to Nov. of 2018. Univariate and multivariate Logistic regression were conducted to find the related factors of knowing about tuberculosis and related knowledge. Chi-square test was used to analyze the changes of ways access to tuberculosis-related information. Results: There were 440 participants (79.4%) aware of tuberculosis, including 215(85.7%) in 2014 and 225(74.3%) in 2018. The factors affecting awareness on tuberculosis were female ( AOR=1.60, 95%CI =1.04-2.47) vs male; and junior middle school( AOR=1.99, 95%CI =1.03-3.85), high school( AOR=3.27, 95%CI =1.57-6.81), college or higher ( AOR=6.73，95%CI =2.55-17.76) vs primary school or lower; year 2018 ( AOR=0.50, 95%CI =0.31-0.80) vs 2014. There was no significant statistical difference in the overall knowledge scores of tuberculosis between the students in the two surveys. In 2018, the proportion of tuberculosisrelated information accessed from the Internet (forum, WeChat, Weibo.) and community activities (assembly promotion)(75.10%, 26.70%) was higher than that of 2014(36.20%, 13.10%)( χ 2=68.88, 12.79, P <0.05). Conclusion The proportion of students aware of tuberculosis and TB control in Zhejiang Province were not significantly improved. Higher proportion of students get tuberculosis-related information from the new media. Therefore, it is necessary to strengthen health education of tuberculosis in schools, especially through the usage of new media apart from traditional pathways.

Objective: To exploring the relationship between college students’ mobile phone addiction, social support and depression. Methods: During May 2019, 1 703 students from five universities in Shandong Province were selected to complete a questionnaire composed of Mobile Phone Addiction Tendency Scale(MPATS), Perceived Social Support Scale(PSSS) and Center for Epidemiological Studies Depression Scale(CES-D). Results: The scores of mobile phone addiction, social support and depression among college students were(32.84±9.30)(67.20±11.09)(11.61±8.65). The mobile phone addiction and depression score of the low social support group were significantly higher than those of the high social support group( t =10.01, 15.89, P <0.01). Regression analysis showed that mobile phone addiction in the high social support group explained the depression variation to lower than the low social support group( R 2=0.16, 0.19, P <0.01). Social support had a partial mediating effect on mobile phone addiction and depression. The median effect value was -0.10, accounting for 21.0% of the total effect. Conclusion College students’ social support has partial mediating effects on the influence of mobile phone addiction on their depression. Improving the social support level of college students is advantageous to reduce the negative impact of mobile phone addiction on their depressive symptoms.

Objective: To investigate the effect of a 12-week circuit training program on health-related physical fitness and metabolic syndrome risk factors in obese female college students,and to provide reference for targeted interventions. Methods: Sixty subjects with body mass index (BMI) over 28 kg/m2 were randomly allocated to control group ( n =30) or exercise group( n =30). Participants of control group maintained daily lifestyle while those of exercise group performed circuit training program 3 times per week for 12 weeks. Parameter of body composition (including back strength, sit-up, sit-and-reach, and 1 600 m running time), health-related physical fitness (including body height, body weight, BMI), percentage of body fat (PBF) and lean body mass (LBM) and metabolic syndrome risk factors [including waist circumference(WC), fasting blood glucose(FBG), triglyceride(TG), total cholesterol(TC), highdensity lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C)] were tested before and after the experiment. Results: After intervention, body weight, BMI, PBF decreased, back strength, sit-up, sit-and-reach, and 1 600 m running time performance increased( t =2.14, 2.21, 2.48, -7.21, -7.69, -7.01, 4.83, P <0.05), WC, TG, TC reduced in exercise group compared with pre-test( t =2.89，4.54，2.71， P <0.05), whereas all parameters in control group showed no significantly different( P >0.05). Conclusion Regular circuit training improved body composition, enhanced physical fitness and may contribute to prevent metabolic diseases.