Chris Bonell
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View article: Effects of a whole-school relationships and sexual health intervention on non-competent sexual debut: cluster-randomised trial
Effects of a whole-school relationships and sexual health intervention on non-competent sexual debut: cluster-randomised trial Open
Background Relationships and sex education (RSE) impacts some sexual behaviours but could be strengthened by incorporating whole-school approaches (eg, building engagement, providing contraception). These can prevent pregnancies and sexual…
View article: Learning Together for Mental Health: Rapid systematic review of reviews of school-level interventions to promote mental health and wellbeing
Learning Together for Mental Health: Rapid systematic review of reviews of school-level interventions to promote mental health and wellbeing Open
Background The high prevalence of mental health disorders among adolescents point to the need for interventions that prevent or minimise harms from these. Schools are the ideal setting for such interventions, given almost all children can …
View article: School-based group interpersonal therapy for adolescents with depression in Nepal: protocol for a phase III realist cluster-randomised controlled trial
School-based group interpersonal therapy for adolescents with depression in Nepal: protocol for a phase III realist cluster-randomised controlled trial Open
Background Depression is a leading cause of disability among adolescents, with the burden disproportionately affecting low- and middle-income countries (LMICs) where access to mental health care is limited. Interpersonal therapy (IPT), a s…
View article: Components of Family-Focused Interventions that Have Common Impacts Across Parental Domestic Violence and Abuse, Mental Ill-Health, and Substance Misuse: An Intervention Components Analysis
Components of Family-Focused Interventions that Have Common Impacts Across Parental Domestic Violence and Abuse, Mental Ill-Health, and Substance Misuse: An Intervention Components Analysis Open
Support for families experiencing domestic violence and abuse (DVA), mental ill-health (MH) and substance misuse (SU) is often delivered in siloes, despite the frequent co-occurrence of these public health issues. Little evidence-based gui…
View article: Headteacher challenges and opportunities of implementing COVID-19 preventive measures in schools in England from 2022 onwards
Headteacher challenges and opportunities of implementing COVID-19 preventive measures in schools in England from 2022 onwards Open
Objective: Government guidance to reduce COVID-19 transmission was rapidly implemented by headteachers in primary and secondary schools in England. This study investigated the main challenges and opportunities faced by headteachers during …
View article: The mechanisms by which a whole-school intervention might improve sexual health: qualitative realist research nested in a trial in English secondary schools
The mechanisms by which a whole-school intervention might improve sexual health: qualitative realist research nested in a trial in English secondary schools Open
Whole-school interventions go beyond classroom education, promoting health by modifying school environments. These can be effective in delaying sexual debut and increasing contraception use but mechanisms are poorly understood. Qualitative…
View article: Optimisation of a sexual health and healthy relationships intervention for Further Education in England and Wales (SaFE)
Optimisation of a sexual health and healthy relationships intervention for Further Education in England and Wales (SaFE) Open
Background Adverse sexual health, dating and relationship violence, and sexual harassment are significant public health concerns, especially among young people. Sexually transmitted infection rates are at a 10-year high, and dating and rel…
View article: How populist-aligned views are reflected in people's accounts of the receipt of public health interventions: a systematic review of qualitative studies
How populist-aligned views are reflected in people's accounts of the receipt of public health interventions: a systematic review of qualitative studies Open
Recent evidence suggests an increasing backlash towards government-led public health interventions in the areas of vaccination, climate change, sexual and reproductive healthcare, and non-pharmaceutical infection control measures. One pote…
View article: Feasibility study of Learning Together for Mental Health: fidelity, reach and acceptability of a whole-school intervention aiming to promote health and wellbeing in secondary schools
Feasibility study of Learning Together for Mental Health: fidelity, reach and acceptability of a whole-school intervention aiming to promote health and wellbeing in secondary schools Open
Background Despite high rates of adolescent mental health problems, there are few effective school-based interventions to address this. Whole-school interventions offer a feasible and sustainable means of promoting mental health, but to da…
View article: Effects and costs of a multi-component menstrual health intervention (MENISCUS) on mental health problems, educational performance, and menstrual health in Ugandan secondary schools: an open-label, school-based, cluster-randomised controlled trial
Effects and costs of a multi-component menstrual health intervention (MENISCUS) on mental health problems, educational performance, and menstrual health in Ugandan secondary schools: an open-label, school-based, cluster-randomised controlled trial Open
UK Foreign, Commonwealth and Development Office; Medical Research Council; Department of Health and Social Care; and Wellcome.
View article: Staff motivation and schools' capacities to sustain an intervention to prevent bullying and promote wellbeing in English secondary schools: a qualitative study
Staff motivation and schools' capacities to sustain an intervention to prevent bullying and promote wellbeing in English secondary schools: a qualitative study Open
Introduction Discontinuing effective school health interventions prevents new practices from reaching wider student populations and wastes investment in implementation. While reviews have consistently identified facilitators and barriers t…
View article: Learning together for mental health: feasibility of measures to assess a whole-school mental health and wellbeing intervention in secondary schools
Learning together for mental health: feasibility of measures to assess a whole-school mental health and wellbeing intervention in secondary schools Open
Background Population mental health in young people worsened during and since the COVID-19 pandemic. School environments can play a key role in improving young people’s mental health. Learning Together for Mental Health is a whole-school i…
View article: Longitudinal Assessment of Sexual Behavior and Relationship Quality During the First Year of the COVID-19 Pandemic in Britain: Findings from a Longitudinal Population Survey (Natsal-COVID)
Longitudinal Assessment of Sexual Behavior and Relationship Quality During the First Year of the COVID-19 Pandemic in Britain: Findings from a Longitudinal Population Survey (Natsal-COVID) Open
While the impact of social restrictions on sexual and romantic life early in the COVID-19 pandemic has been widely studied, little is known about impacts beyond the initial months. We analyzed responses from 2,098 British adults (aged 18-5…
View article: Exploring context, mechanisms and outcomes in group interpersonal therapy for adolescents with depression in Nepal: a qualitative realist analysis
Exploring context, mechanisms and outcomes in group interpersonal therapy for adolescents with depression in Nepal: a qualitative realist analysis Open
Interpersonal Psychotherapy (IPT) is an evidence-based treatment for adolescent depression. However, since it does not work for all adolescents in all settings, more research on its heterogeneous effects is needed. Using a realist approach…
View article: Social norms relating to gender and dating and relationship violence in English secondary schools: Exploring student, staff and parent/carer accounts
Social norms relating to gender and dating and relationship violence in English secondary schools: Exploring student, staff and parent/carer accounts Open
Dating and relationship violence (DRV) among young people is widespread. DRV is associated with subsequent mental ill health, substance use and sexual risk among girls and boys and is a leading cause of morbidity and mortality among girls …
View article: Sexual health and healthy relationships for Further Education (SaFE) in Wales and England: results from a pilot cluster randomised controlled trial
Sexual health and healthy relationships for Further Education (SaFE) in Wales and England: results from a pilot cluster randomised controlled trial Open
Objectives To examine the acceptability of implementing, trialling and estimating the cost of the Sexual health and healthy relationships for Further Education (SaFE) intervention. Design Two-arm repeated cross-sectional pilot cluster rand…
View article: Public engagement to refine a whole-school intervention to promote adolescent mental health
Public engagement to refine a whole-school intervention to promote adolescent mental health Open
Background Despite high rates of adolescent mental health problems, there are few effective school-based interventions to address this. Whole-school interventions offer a feasible and sustainable means of promoting mental health, but few h…
View article: Exploring how to widen the acceptability of public health interventions: a systematic review protocol
Exploring how to widen the acceptability of public health interventions: a systematic review protocol Open
Introduction Health interventions that require significant change to individual lifestyles or social norms can pose a challenge for widespread public acceptability and uptake. At the same time, over the last two decades, there has been inc…
View article: Association of volatile substance, nitrous oxide and alkyl nitrate use with mental health in UK adolescents
Association of volatile substance, nitrous oxide and alkyl nitrate use with mental health in UK adolescents Open
Background ‘Inhalants’ have been associated with poorer mental health in adolescence, but little is known of associations with specific types of inhalants. Aims We aimed to investigate associations of using volatile substances, nitrous oxi…
View article: Motivational effectiveness of prosocial public health messaging to reduce respiratory infection risk: A network meta-analysis
Motivational effectiveness of prosocial public health messaging to reduce respiratory infection risk: A network meta-analysis Open
Clear communication is vital for adopting public health interventions that promote protective behaviours against respiratory infections. This systematic review and network meta-analysis assessed the effectiveness of these interventions usi…
View article: The implementation of compulsory relationships and sex education in English secondary schools: qualitative research in the 2022–23 school year
The implementation of compulsory relationships and sex education in English secondary schools: qualitative research in the 2022–23 school year Open
The quality of sex education varies. In England from 2020, the government attempted to improve provision by making lessons a statutory requirement. We assessed implementation in 25 secondary schools in 2022–23, framed by May’s general theo…
View article: Association between cannabis potency and mental health in adolescence
Association between cannabis potency and mental health in adolescence Open
High-potency cannabis use is associated with an increased risk of probable mental health disorders. Services and programming to minimise drug harms may need to be adapted to pay more attention to cannabis potency.
View article: Violence outcomes in later adolescence with the Good School Toolkit-Primary: a nonrandomized controlled trial in Uganda
Violence outcomes in later adolescence with the Good School Toolkit-Primary: a nonrandomized controlled trial in Uganda Open
Background We sought to determine whether the Good School Toolkit-Primary violence prevention intervention was associated with reduced victimisation and perpetration of peer and intimate partner violence four years later, and if any associ…
View article: Hard to reach? Methodological challenges researching vulnerable, gang‐involved, young people
Hard to reach? Methodological challenges researching vulnerable, gang‐involved, young people Open
Introduction Research with young people (YP) is ethically challenging and bound in a complex maze of issues relating to power, voice and representation. Such sensitivities mean that the challenges raised in researching marginalised YP are …