Objective: To assess the status of current e cigarette perception and its influencing factors among adolescents in Shanghai, so as to provide reference for the refinement of the prevention and control measures of teenagers e cigarette use. Methods: From May to June 2021, a stratified random cluster sampling was used to investigate 7 456 junior high and high school students in Shanghai. Harm and benefit perception of e cigarette as well as its social environment benefits were collected. Results: The rate of adolescents ever and current e cigarette use was 3.19% and 1.09%, respectively. The top four risk factors for low harm perception of e cigarette were adolescent e cigarette use( OR=2.74, 95%CI =2.10-3.59), high school students ( OR=1.47, 95%CI = 1.32 - 1.64 ), family members ( OR=1.45, 95%CI =1.24-1.70) and friends ( OR=1.36, 95%CI =1.20-1.54) using e cigarette. Adolescent ecigarette use ( OR=2.77, 95%CI =1.97-3.89), high school students( OR=2.11, 95%CI =1.89-2.36), friends ( OR= 1.63, 95%CI =1.42-1.87) and family members using e cigarette( OR=1.39, 95%CI =1.18-1.65) were the top four associated factors for high benefit perception of e cigarette. And, adolescent e cigarette use ( OR=1.95, 95%CI =1.47-2.59), high school students ( OR= 1.73, 95%CI =1.55-1.93), friends ( OR=1.60, 95%CI =1.40-1.82) and pocket money≥200 yuan using e cigarette( OR= 1.29 , 95%CI =1.17-1.43) were the top four risk factors for high social environmental benefit perception of e cigarette. Moreover, perception of e cigarette harm, benefit and social environmental benefit were associated with the risk of future use of e cigarette( OR = 0.78,1.44,1.21, P <0.01). Conclusion Being high school students and using e cigarette by oneself, friends, and family members are the important influencing factors for adolescents e cigarette perception. Both low harm and high benefit perception of e cigarette elevate the risk of future e cigarette use among adolescents, so effective measures should be taken to promote control education about e cigarette and smoke free environment construction.

In recent years, with the vigorous marketing of e-cigarette manufacturers, e-cigarettes have become a popular tobacco product for adolescents. The problem of e-cigarette environmental exposure among adolescents is also getting worse and its associated adverse impacts cannot be ignored. However, domestic research on the environmental exposure to e-cigarettes among youth is insufficient, and experience on e-cigarette regulation is also limited. This review first briefly introduced the definition and sources of e-cigarette environment exposure, then focused on the differences of e-cigarette environmental exposure among adolescents with different characteristics to identify possible influencing factors, as well as the impacts of e-cigarette environmental exposure on adolescents, and finally summarized international countermeasures to prevent e-cigarette environmental exposure in adolescents, aiming to provide directional guidance for China to conduct e-cigarette control activities among adolescents.

ObjectiveTo explore the association between social support， parent-child relationships， and depression， anxiety， and loneliness among adolescents， in order to provide a reference for improving mental health in youth. MethodsA total of 11，596 middle school students from two districts of Shanghai were investigated with the stratified random cluster sampling method. The Chinese version of Patient Health Questionnaire （PHQ-2-C）， Generalized Anxiety Disorder （GAD-7）， UCLA Loneliness Scale （ULS-6）， Perceived Social Support Scale and Parent-child Cohesion Questionnaire were used in the survey. Statistical inferences were made using t-test， ANOVA， and logistic regression analysis. ResultsGirls， non-graduates， students ranking in the top 25%， adolescents living with parents and with higher socioeconomic status had higher scores of social support and parent-child cohesion than boys， graduates， students ranking in the middle or in the bottom 25%， adolescents not living with parents and with lower socioeconomic status （P<0.05）. Adolescents' parent-child cohesion and social support were negatively correlated with all kinds of emotions. Parent-child cohesion was an associated factor of depression （OR=0.93， 95%CI：0.91‒0.94）， loneliness （OR=0.94， 95%CI：0.94‒0.95） and anxiety （OR_mild=0.98， 95%CI： 0.98‒0.99； OR_{moderate or severe}=0.96， 95%CI： 0.95‒0.98）， but there were differences in the correlation between emotions and social support in different dimensions. ConclusionSocial support and parent-child relationship are significantly associated with depression， anxiety and loneliness in adolescent students. Paying more attention to youth with different characteristics， taking targeted measures to improve the level of social support and establishing a good family relationship are conducive to promoting the mental health of adolescents.

ObjectiveTo investigate the cognition of e-cigarette compositions and hazards and its influencing factors among secondary school personnel （junior， senior and vocational high school） in Shanghai， so as to provide ideas for improving the cognition level of e-cigarettes among the school personnel and tobacco control efforts on campus in the future. MethodsA multi-stage stratified cluster random sampling method was used to conduct an anonymous online questionnaire survey among 1 767 secondary school personnel in Shanghai. ResultsThe proportion of school staff who had used e-cigarettes was 3.79%. The participants who were not sure whether the e-cigarette smoke was “mainly water vapor （incorrect）” and whether the e-cigarette smoke “contained nicotine （correct）” and “contained formaldehyde （correct）” accounted for 62.71%， 54.44% and 61.91%， respectively. Among them， 68.48%， 55.46% and 50.37%， respectively， agreed that e-cigarettes would be “addictive”， “harmful” and “that second-hand smoke was harmful”. Binary logistic regression analysis showed the following risk factors for the low level of school personnel’s awareness of e-cigarette compositions： age ≥40 years （OR=1.65， 95%CI： 1.32‒2.06）， working in junior high school （OR=1.37， 95%CI： 1.09‒1.73）， educational attainment level as junior college or below （OR=1.67， 95%CI： 1.02‒2.74）， and not having participated in tobacco control education activities （OR=1.37， 95%CI： 1.08‒1.73）. Meanwhile， working in junior （OR=1.43， 95%CI： 1.12‒1.83） or senior （OR=1.44， 95%CI： 1.08‒1.92） high school， educational attainment level as junior college or below（OR=2.10， 95%CI： 1.24‒3.56）， having used e-cigarettes （OR=2.98， 95%CI： 1.63‒5.42）， not having participated in tobacco control education activities （OR=1.49， 95%CI： 1.16‒1.92） and low level of awareness of e-cigarette compositions （OR=4.24， 95%CI： 3.44‒5.23） were risk factors for the low level of school personnel’s awareness of e-cigarette hazards. ConclusionsThe level of e-cigarette awareness among school personnel in Shanghai is low， especially those who are older， had low educational attainment level and had used e-cigarettes. In the future， tobacco control education for school personnel should be strengthened to improve their cognition and ability of tobacco control on campus.