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Background: Associations of the strength of school smoking policies with cigarette, e-cigarette and cannabis use in Wales were examined. Methods: Nationally representative cross-sectional survey of pupils aged 11-16 years (N=7376) in Wales. Senior management team members from 67 schools completed questionnaires about school smoking policies, substance use education and tobacco cessation initiatives. Multi-level, logistic regression analyses investigated self-reported cigarette, e-cigarette and cannabis use, for all students and those aged 15-16 years. Results: Prevalence of current smoking, e-cigarette use and cannabis use in the past month were 5.3%, 11.5% and 2.9%, respectively. Of schools that provided details about smoking policies (66/67), 39.4% were strong (written policy applied to everyone in all locations), 43.9% were moderate (written policy not applied to everyone in all locations) and 16.7% had no written policy. There was no evidence of an association of school smoking policies with pupils' tobacco or e-cigarette use. However, students from schools with a moderate policy [OR = 0.47; 95% (confidence interval) CI: 0.26-0.84] were less likely to have used cannabis in the past month compared to schools with no written policy. This trend was stronger for students aged 15-16 years (moderate policy: OR = 0.42; 95% CI: 0.22-0.80; strong policy: OR= 0.45; 95% CI: 0.23-0.87). Conclusions: School smoking policies may exert less influence on young people's smoking behaviours than they did during times of higher adolescent smoking prevalence. Longitudinal studies are needed to examine the potential influence of school smoking policies on cannabis use and mechanisms explaining this association. [ABSTRACT FROM AUTHOR]

Background: This study investigates how the sexual health outcomes of a representative sample of students aged 15-16 in Wales vary according to the person delivering Sex and Relationships Education (SRE) in schools, students' access to on-site sexual health services and access to free condoms., Methods: Cross-sectional, self-report survey data were collected from students who participated in the 2015/16 School Health Research Network questionnaire in Wales. Data were analyzed from 59 schools, totalling 3781 students aged 15-16 (M = 15.7; SD = 0.3) who responded to questions about ever having had sex; age of sexual initiation and condom use at last intercourse. School level data were also collected, examining who delivers school SRE, provision of on-site, school 'drop-in' sexual health services and provision of free condoms for students. Binary and linear multi-level analyses explored the relationship between school level predictors and sexual health outcomes., Results: Compared to teachers, other modes of SRE delivery were associated with better sexual health outcomes, including remaining sexually inactive, later age of first intercourse and condom use. Providing on-site sexual health services did not significantly reduce the odds of having ever had sex or delaying first intercourse; but was associated with increased condom use. On-site condom provision was associated with lower condom use., Conclusions: SRE delivery by educators other than teachers is optimum to young people's sexual health outcomes. Further funding and coordination of on-site sexual health advice services are required. Longitudinal research is needed to identify the temporal sequence of sexual health practices and outcomes.