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Stoppelbein L, McRae E, Smith S. Exploring the Nexus of Adverse Childhood Experiences and Aggression in Children and Adolescents: A Scoping Review. TRAUMA, VIOLENCE & ABUSE 2024:15248380241246764. [PMID: 38651827 DOI: 10.1177/15248380241246764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
A strong relation between adverse childhood experiences (ACE) and aggression has been established in adult populations, with less research examining this relation earlier in development. The purpose of this study was to complete a scoping review of the current evidence available on the relation between ACE and aggression and subtypes of aggression within a child and adolescent population. Inclusion criteria for the review included publications in English between 1998 and 2023, use of a child/adolescent population, and peer-review and quantitative publications. Databases searched included PubMed, APA PsycINFO, Scopus, and EBSCO, and search terms included words related to ACE and aggression. Initial selection was based on title and abstract, with 32 papers meeting eligibility criteria for inclusion. Two authors extracted the relevant characteristics of the studies independently and conferred on any disagreements. The overall findings from the scoping review suggest that there is a strong link between aggression and ACE; however, this link may not be as strong for specific subtypes of aggression. Additionally, characteristics of ACE may play role in understanding this relation, but little research is available within a child and adolescent population. A few studies have attempted to examine potential mediators and moderators of this relation; however, none have been replicated within a child and adolescent population. The findings from this review support the need for additional research in this area and identify significant gaps in the literature that need to be addressed within a child and adolescent population.
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Brown C, Nkemjika S, Ratto J, Dube SR, Gilbert L, Chiang L, Picchetti V, Coomer R, Kambona C, McOwen J, Akani B, Kamagate MF, Low A, Manuel P, Agusto A, Annor FB. Adverse Childhood Experiences and Associations with Mental Health, Substance Use, and Violence Perpetration among Young Adults in sub-Saharan Africa. CHILD ABUSE & NEGLECT 2024; 150:106524. [PMID: 38854869 PMCID: PMC11160582 DOI: 10.1016/j.chiabu.2023.106524] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
Background Adverse childhood experiences (ACEs) can have debilitating effects on child well-being, with consequences persisting into adulthood. Most ACE studies have been conducted in high-income countries and show a graded relationship between multiple ACE exposures and adverse health outcomes. Less is known about the types and burden of ACEs in sub-Saharan Africa (SSA). Objective To estimate the pooled prevalence of six individual and cumulative ACE exposures (physical, sexual, and emotional violence; orphanhood; witnessing interparental and community violence) and assess their association with mental health outcomes, substance use, and violence perpetration among young adults in SSA. Participants and setting Aggregate data from the Violence Against Children and Youth Survey (VACS) in Cote d'Ivoire 2018, Kenya 2019, Lesotho 2018, Mozambique 2019, and Namibia 2019 included a sample of 11,498 young adults aged 18-24 years. Methods Cumulative ACEs were defined by an integer count of the total number of individual ACEs (0 to 6). Weighted prevalence and adjusted odds ratios were estimated. Result ACEs prevalence ranged from 7.8% (emotional violence) to 55.0% (witnessing community violence). Strong graded relationships between cumulative ACE exposure and all study outcomes for both males and females were observed. Among females, witnessing interparental violence was the only individual ACE risk factor significantly associated with increased odds of substance use; among males, emotional violence was significantly associated with all outcomes. Conclusion ACEs are associated with adverse mental health, substance use, and violence perpetration in SSA. Gender-specific and culturally sensitive intervention strategies are needed to effectively mitigate ACEs in this population.
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Affiliation(s)
- Colvette Brown
- Division of Violence Prevention, Centers for Disease Control and Prevention, Atlanta, USA
| | - Stanley Nkemjika
- Department of Psychiatry, Interfaith Medical Center, Brooklyn, NY, USA
| | - Jeffrey Ratto
- Division of Violence Prevention, Centers for Disease Control and Prevention, Atlanta, USA
| | - Shanta R. Dube
- Levine College of Health Sciences, Wingate University, Wingate, North Carolina
| | - Leah Gilbert
- National Institutes of Health, Eunice Kennedy Shriver National Institute of Child Health and Human Development
| | - Laura Chiang
- Division of Violence Prevention, Centers for Disease Control and Prevention, Atlanta, USA
| | - Viani Picchetti
- Division of Violence Prevention, Centers for Disease Control and Prevention, Atlanta, USA
| | - Rachel Coomer
- Division of Global Health HIV and TB, Centers for Disease Control and Prevention, Namibia
| | - Caroline Kambona
- Division of Global Health HIV and TB, Centers for Disease Control and Prevention, Kenya
| | - Jordan McOwen
- Division of Global Health HIV and TB, Centers for Disease Control and Prevention, Mozambique
| | - Bangaman Akani
- Department of Public Health, Felix Houphouet Boigny University, Abidjan, Cote d’ Ivoire
| | - Maman Fathim Kamagate
- Division of Global Health HIV and TB, Centers for Disease Control and Prevention, Cote d’ Ivoire
| | - Andrea Low
- International Center for AIDS Care and Treatment Program (ICAP)at Columbia University, NY
| | - Pedro Manuel
- Division of Global Health HIV and TB, Centers for Disease Control and Prevention, Mozambique
| | | | - Francis B. Annor
- Division of Violence Prevention, Centers for Disease Control and Prevention, Atlanta, USA
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Beckwith S, Lou C, Michielsen K, Mafuta E, Wilopo SA, Blum RW. Violence Perpetration in Early Adolescence: A Study of Four Urban Communities Worldwide. J Adolesc Health 2022; 71:616-627. [PMID: 35961872 PMCID: PMC9560240 DOI: 10.1016/j.jadohealth.2022.06.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 05/12/2022] [Accepted: 06/15/2022] [Indexed: 11/21/2022]
Abstract
PURPOSE Violence perpetration is common among adolescents worldwide but existing research largely focuses on boys, older adolescents, and partner violence. Our study sought to identify individual, family, and neighborhood/peer factors associated with violence perpetration in a multinational sample of male and female young adolescents. METHODS We used cross-sectional data from 5,762 adolescents in four sites in the Global Early Adolescent Study: Flanders, Belgium; Kinshasa, Democratic Republic of the Congo; Shanghai, China; and Semarang, Indonesia. Adolescents resided in high-poverty urban areas and were aged 10 to 14 years. Logistic regression examined pooled and stratified associations between independent variables with peer violence perpetration in the past six months. Factors included media viewing habits, gender norms, victimization, agency/empowerment, adversity, depression, familial relationships, neighborhood cohesion, and peer behaviors. RESULTS Restricted-model analyses found increased odds of violence perpetration associated with high media consumption, pornography viewing, violence or bullying victimization, having drank alcohol, depressive symptoms, adverse childhood experiences, greater behavioral control, greater decision-making, feeling unsafe in the neighborhood/school, peer alcohol/tobacco use, and witnessing peers start a fight. Decreased odds of violence perpetration were associated with more egalitarian views on two gender norms scales, closer parental relationships, neighbors looking out for one another, and greater availability of adult help. DISCUSSION Among young adolescents, increased odds of violence perpetration were related to a perceived lack of safety and risky peer behaviors. Parental and neighborhood connections were often associated with decreased perpetration. Further research examining the interplay of such factors among young adolescents is needed to inform effective intervention and policy.
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Affiliation(s)
- Sam Beckwith
- Department of Population, Family, and Reproductive Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
| | - Chaohua Lou
- Department of Epidemiology & Social Science, NHC Key Lab. of Reproductive Regulation (Shanghai Institute for Biomedical and Pharmaceutical Technologies), Fudan University, Shanghai, China
| | - Kristien Michielsen
- International Centre for Reproductive Health, Ghent University, Ghent, Belgium
| | - Eric Mafuta
- Health Systems Policy and Management Department, University of Kinshasa School of Public Health, Kinshasa, Democratic Republic of the Congo
| | - Siswanto Agus Wilopo
- Department of Biostatistics, Epidemiology and Population Health and Center for Reproductive Health, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Robert Wm Blum
- Department of Population, Family, and Reproductive Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
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King T, Perales F, Sutherland G. Why we need population data on gender norms, and why this is important for population health. J Epidemiol Community Health 2022; 76:620-622. [PMID: 35193954 DOI: 10.1136/jech-2021-217900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 02/09/2022] [Indexed: 11/04/2022]
Abstract
Gender norms are essential barometers of gender equality; inequitable gender norms are indicative of core inequalities in society that undermine the health of many groups. Fundamentally embedded in the gender system, prescriptive and restrictive gender norms have been shown to have deleterious effects on the health of women, men, girls and boys, as well as gender and sexual minorities. Gender norms are mutable, and there is potential to target and transform harmful and inequitable gender norms to drive gender equality. Gender-transformative approaches are needed, but a necessary first step is to identify and benchmark restrictive and inequitable gender norms, monitor change and progress, and highlight areas where interventions can be targeted for greatest effect. Efforts to do this are currently stymied by a lack of fit-for-purpose data. Routinely collected, population representative data on gender norms is urgently needed. This is vital to supporting and progressing gender equality and will contribute substantially to lifting population health.
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Affiliation(s)
- Tania King
- Centre for Health Equity, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Francisco Perales
- School of Social Science, The University of Queensland, Brisbane, Queensland, Australia
| | - Georgina Sutherland
- Centre for Health Equity, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
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Naicker SN, Ahun MN, Besharati S, Norris SA, Orri M, Richter LM. The Long-Term Health and Human Capital Consequences of Adverse Childhood Experiences in the Birth to Thirty Cohort: Single, Cumulative, and Clustered Adversity. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:1799. [PMID: 35162821 PMCID: PMC8835353 DOI: 10.3390/ijerph19031799] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/01/2022] [Accepted: 02/03/2022] [Indexed: 02/01/2023]
Abstract
Human capital-that is the cumulative abilities, education, social skills, and mental and physical health one possesses-is increasingly recognized as key to the reduction of inequality in societies. Adverse childhood experiences have been linked to a range of human capital indicators, with the majority of research in high-income, western settings. This study aims to examine the link between adverse childhood experiences and adult human capital in a South African birth cohort and to test whether associations differ by measurement of adversity. Secondary analysis of data from the Birth to Thirty study was undertaken. Exposure data on adversity was collected prospectively throughout childhood and retrospectively at age 22. Human capital outcomes were collected at age 28. Adversity was measured as single adverse experiences, cumulative adversity, and clustered adversity. All three measurements of adversity were linked to poor human capital outcomes, with risk for poor human capital increasing with the accumulation of adversity. Adversity was clustered by quantity (low versus high) and type (household dysfunction versus abuse). Adversity in childhood was linked to a broad range of negative outcomes in young adulthood regardless of how it was measured. Nevertheless, issues of measurement are important to understand the risk mechanisms that underlie the association between adversity and poor human capital.
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Affiliation(s)
- Sara N. Naicker
- DSI-NRF Centre of Excellence in Human Development, University of the Witwatersrand, Johannesburg 2050, South Africa; (S.A.N.); (L.M.R.)
| | - Marilyn N. Ahun
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA;
- School of Public Health, Université de Montréal, Montreal, QC H3C 3J7, Canada
| | - Sahba Besharati
- Department of Psychology, School of Human and Community Development, University of the Witwatersrand, Johannesburg 2050, South Africa;
- CIFAR Azrieli Global Scholars Program, CIFAR, Toronto, ON M5G 1M1, Canada
| | - Shane A. Norris
- DSI-NRF Centre of Excellence in Human Development, University of the Witwatersrand, Johannesburg 2050, South Africa; (S.A.N.); (L.M.R.)
- SAMRC Developmental Pathways for Health Research Unit, University of the Witwatersrand, Johannesburg 2050, South Africa
- Hubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, GA 30322, USA
| | - Massimiliano Orri
- McGill Group for Suicide Studies, Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montreal, QC H3A 0G4, Canada;
| | - Linda M. Richter
- DSI-NRF Centre of Excellence in Human Development, University of the Witwatersrand, Johannesburg 2050, South Africa; (S.A.N.); (L.M.R.)
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Broekhof R, Nordahl HM, Bjørnelv S, Selvik SG. Prevalence of adverse childhood experiences and their co-occurrence in a large population of adolescents: a Young HUNT 3 study. Soc Psychiatry Psychiatr Epidemiol 2022; 57:2359-2366. [PMID: 35460058 PMCID: PMC9672007 DOI: 10.1007/s00127-022-02277-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 03/31/2022] [Indexed: 11/26/2022]
Abstract
PURPOSE Studies of adverse childhood experiences (ACEs) undertaken at the time of adolescence in the general population are not common. The aim of this study was to determine the prevalence and co-occurrence of the individual ACEs and sub-types of ACEs in a large population of adolescents. METHODS Data were used from the Young Nord-Trøndelag Health (Young HUNT 3) study, a population-based study of young adolescents. ACEs were operational defined as sexual, physical and/or emotional abuse; physical and/or emotional neglect; and/or household dysfunction. Co-occurrence was measured as the accumulation of ACEs and as an overlap analysis. RESULTS Of the 8199 evaluable adolescents, 65.8% had experienced at least one ACE and 28% of those had experienced more than one ACE. Household dysfunction was the most prevalent ACE subtype. The biggest overlaps among the three ACE sub-types were seen in those reporting neglect or abuse. CONCLUSION There was a high degree of overlap between the three ACE sub-types and the individual ACEs, indicating that ACEs should be assessed together as a whole rather than separately. This study provides an opportunity to assess ACEs and their co-occurrences in relation to outcomes later in life.
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Affiliation(s)
- Rosalie Broekhof
- Department of Psychiatry, Namsos Hospital, Nord-Trøndelag Hospital Trust, Namsos, Norway.
- Department of Mental Health, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology, Trondheim, Norway.
| | - Hans M Nordahl
- Department of Mental Health, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology, Trondheim, Norway
- St. Olavs University Hospital, Avd. Østmarka, Trondheim, Norway
| | - Sigrid Bjørnelv
- Department of Mental Health, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology, Trondheim, Norway
| | - Sara G Selvik
- Department of Psychiatry, Namsos Hospital, Nord-Trøndelag Hospital Trust, Namsos, Norway
- Department of Mental Health, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology, Trondheim, Norway
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Ramaiya A, Zimmerman L, Mafuta E, Lulebo A, Chipeta E, Stones W, Moreau C. Assessing the relationship between agency and peer violence among adolescents aged 10 to 14 years in Kinshasa, Democratic Republic of Congo and Blantyre, Malawi: A cross-sectional study. PLoS Med 2021; 18:e1003552. [PMID: 34898599 PMCID: PMC8716028 DOI: 10.1371/journal.pmed.1003552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 12/29/2021] [Accepted: 11/29/2021] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Interpersonal violence has physical, emotional, educational, social, and economic implications. Although there is interest in empowering young people to challenge harmful norms, there is scant research on how individual agency, and, specifically, the "power to" resist or bring about an outcome relates to peer violence perpetration and victimization in early adolescence. This manuscript explores the relationship between individual agency and peer violence perpetration and victimization among very young adolescents (VYAs) living in two urban poor settings in sub-Saharan Africa (Kinshasa, Democratic Republic of Congo (DRC) and Blantyre, Malawi). METHODS AND FINDINGS The study draws on two cross-sectional surveys including 2,540 adolescents 10 to 14 years from Kinshasa in 2017 (girls = 49.8% and boys = 50.2%) and 1,213 from Blantyre in 2020 (girls = 50.7% and boys = 49.3%). The sample was school based in Malawi but included in-school and out-of-school participants in Kinshasa due to higher levels of early school dropout. Peer violence in the last 6 months (dependent variable) was defined as a four categorical variable: (1) no victimization or perpetration; (2) victimization only; (3) perpetration only; and (4) both victimization and perpetration. Agency was operationalized using 3 scales: freedom of movement, voice, and decision-making, which were further divided into tertiles. Univariate analysis and multivariable multinomial logistic regressions were conducted to evaluate the relationships between each agency indicator and peer violence. The multivariable regression adjusted for individual, family, peer, and community level covariates. All analyses were stratified by gender and site. In both sites, adolescents had greater voice and decision-making power than freedom of movement, and boys had greater freedom of movement than girls. Boys in both settings were more likely to report peer violence in the last six months than girls (40% to 50% versus 32% to 40%, p < 0.001), mostly due to higher rates of a perpetration-victimization overlap (18% to 23% versus 10% to 15%, p < 0.001). Adolescents reporting the greatest freedom of movement (Tertile 3) (with the exception of girls in Kinshasa) had a greater relative risk ratio (RRR) of reporting a perpetrator-victim overlap (boys Kinshasa: RRR = 1.9 (1.2 to 2.8, p = 0.003); boys Blantyre: RRR = 3.8 (1.7 to 8.3, p = 0.001); and girls Blantyre: RRR = 2.4 (1.1 to 5.1, p = 0.03)). Adolescents with the highest decision-making power in Kinshasa also had greater RRR of reporting a perpetrator-victim overlap (boys: RRR = 3.0 (1.8 to 4.8, p < 0.001). Additionally, girls and boys in Kinshasa with intermediate decision-making power (tertile 2 versus 1) had a lower RRR of being victimized (Girls: RRR = 1.7 (1.02 to 2.7, p = 0.04); Boys: RRR = 0.6 (0.4 to 0.9, p = 0.01)). Higher voice among boys in Kinshasa (Tertile 2: RRR = 1.9 (1.2 to 2.9, p = 0.003) and Tertile 3: 1.8 (1.2 to 2.8, p = 0.009)) and girls in Blantyre (Tertile 2: 2.0 (1.01 to 3.9, p = 0.048)) was associated with a perpetrator-victim overlap, and girls with more voice in Blantyre had a greater RRR of being victimized (Tertile 2: RRR = 1.9 (1.1 to 3.1, p = 0.02)). Generally, associations were stronger for boys than girls, and associations often differed when victimization and perpetration occurred in isolation of each other. A main limitation of this study is that the cross-sectional nature of the data does not allow a causal interpretation of the findings, which need further longitudinal exploration to establish temporality. CONCLUSIONS In this study, we observed that peer violence is a gendered experience that is related to young people's agency. This stresses the importance of addressing interpersonal violence in empowerment programs and of including boys who experience the greatest perpetration-victimization overlap.
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Affiliation(s)
- Astha Ramaiya
- Department of Population, Family and Reproductive Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Linnea Zimmerman
- Department of Population, Family and Reproductive Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Eric Mafuta
- Faculty of Medicine, Kinshasa School of Public Health, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Aimee Lulebo
- Faculty of Medicine, Kinshasa School of Public Health, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Effie Chipeta
- University of Malawi College of Medicine, Blantyre, Malawi
| | - William Stones
- University of Malawi College of Medicine, Blantyre, Malawi
| | - Caroline Moreau
- Department of Population, Family and Reproductive Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, United States of America
- Soins Primaires et Prévention, Center for Research in Epidemiology and Population Health (CESP), Villejuif, France
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Saewyc E. The Next Phase of the Global Early Adolescent Study: Measuring How Gender Norms and Gender Inequality Intensify and Influence Health. J Adolesc Health 2021; 69:S1-S2. [PMID: 34217453 DOI: 10.1016/j.jadohealth.2021.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 04/07/2021] [Indexed: 10/21/2022]
Affiliation(s)
- Elizabeth Saewyc
- University of British Columbia School of Nursing, Vancouver, British Columbia, Canada.
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Moreau C, Blum R, Mmari K, Hunersen K, Mafuta E, Lulebi A, Wilopo S, Stones W, Shervington D, Michielsen K, Lou C, Borges AL, Maddaleno M. Gender and Health in Very Young Adolescents. J Adolesc Health 2021; 69:S3-S4. [PMID: 34217456 DOI: 10.1016/j.jadohealth.2021.04.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 04/15/2021] [Indexed: 11/30/2022]
Affiliation(s)
- Caroline Moreau
- Population Family And Reproductive Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland; Soins Primaires et Prévention, Inserm U1018, Center for research in Epidemiology and Population Health, Villejuif, France.
| | - Robert Blum
- Population Family And Reproductive Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Kristin Mmari
- Population Family And Reproductive Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Kara Hunersen
- Population Family And Reproductive Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Eric Mafuta
- Health Systems Policy and Management Department, Kinshasa School of Public Health, Kinshasa, Democratic Republic of the Congo
| | - Aimée Lulebi
- Health Systems Policy and Management Department, Kinshasa School of Public Health, Kinshasa, Democratic Republic of the Congo
| | | | | | | | - Kristien Michielsen
- International Centre for Reproductive Health, Ghent University, Ghent, Belgium
| | - Chaohua Lou
- Shanghai Institute of Planned Parenthood Research, Shanghai, China
| | | | - Matilde Maddaleno
- Programa Centro Salud Pública, Facultad de Ciencias Médicas, University of Santiago, Santiago, Chile
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