Public Health Commons^™

Modifiers Of The Effect Of Maternal Multiple Micronutrient Supplementation On Stillbirth, Birth Outcomes, And Infant Mortality: A Meta-Analysis Of Individual Patient Data From 17 Randomised Trials In Low-Income And Middle-Income Countries, Emily R. Smith, Anuraj H. Shankar, Lee S-F Wu, Said Aboud, Seth Adu Afarwuah, Hasmot Ali, Rina Agustina, Shams Arifeen, Per Ashorn, Arjumand Rizvi

Department of Paediatrics and Child Health

Background: Micronutrient deficiencies are common among women in low-income and middle-income countries. Data from randomised trials suggest that maternal multiple micronutrient supplementation decreases the risk of low birthweight and potentially improves other infant health outcomes. However, heterogeneity across studies suggests influence from effect modifiers. We aimed to identify individual-level modifiers of the effect of multiple micronutrient supplements on stillbirth, birth outcomes, and infant mortality in low-income and middle-income countries.
Methods: This two-stage meta-analysis of individual patient included data from 17 randomised controlled trials done in 14 low-income and middle-income countries, which compared multiple micronutrient supplements containing iron-folic acid versus iron-folic …

Influenza Epidemiology And Immunization During Pregnancy: Final Report Of A World Health Organization Working Group, Deshayne B. Fell, Eduardo Azziz-Baumgartner, Michael G. Baker, Maneesh Batra, Julien Beauté, Philippe Beutels, Niranjan Bhat, Zulfiqar Ahmed Bhutta, Cheryl Cohen, Rehana Salam

Department of Paediatrics and Child Health

From 2014 to 2017, the World Health Organization convened a working group to evaluate influenza disease burden and vaccine efficacy to inform estimates of maternal influenza immunization program impact. The group evaluated existing systematic reviews and relevant primary studies, and conducted four new systematic reviews. There was strong evidence that maternal influenza immunization prevented influenza illness in pregnant women and their infants, although data on severe illness prevention were lacking. The limited number of studies reporting influenza incidence in pregnant women and infants under six months had highly variable estimates and underrepresented low- and middle-income countries. The evidence that maternal …

Measuring Home Environments Across Cultures: Invariance Of The Home Scale Across Eight International Sites From The Mal-Ed Study, Paul C. Jones, Laura L. Pendergast, Barbara A. Schaefer, Muneera Rasheed, Erling Svensen, Rebecca Scharf, Rita Shrestha, Angelina Maphula, Reeba Roshan, Zeba Rasmussen

Department of Paediatrics and Child Health

The home environment provides the context for much of a child's early development. Examples of important aspects of the home environment include safety, cleanliness, and opportunities for cognitive stimulation. This study sought to examine the psychometric properties of an adapted form of the Home Observation for the Measurement of the Environment (HOME; Caldwell & Bradley, 1984, 2003) across the eight international sites of the MAL-ED project (Dhaka, Bangladesh; Vellore, India; Bhakatapur, Nepal; Naushahro Feroze, Pakistan; Fortaleza, Brazil; Loreto, Peru; Venda, South Africa; Haydom, Tanzania), to identify a factor structure that fit the data at all sites, and to derive a …

Progress And Priorities For Reproductive, Maternal, Newborn, And Child Health In Kenya: A Countdown To 2015 Country Case Study, Emily C. Keats, Anthony Ngugi, William Macharia, Nadia Akseer, Emma Nelima Khaemba, Zaid Ahmad Bhatti, Arjumand Rizvi, John Tole, Zulfiqar Ahmed Bhutta

Department of Paediatrics and Child Health

Background: Progress in reproductive, maternal, newborn, and child health (RMNCH) in Kenya has been inconsistent over the past two decades, despite the global push to foster accountability, reduce child mortality, and improve maternal health in an equitable manner. Although several cross-sectional assessments have been done, a systematic analysis of RMNCH in Kenya was needed to better understand the push and pull factors that govern intervention coverage and influence mortality trends. As such, we aimed to determine coverage and impact of key RMNCH interventions between 1990 and 2015.
Methods: We did a comprehensive, systematic assessment of RMNCH in Kenya from 1990 …

How Canada Can Help Global Adolescent Health Mature, Ashley Vandermorris, Zulfiqar Ahmed Bhutta

Department of Paediatrics and Child Health

Background: There is an emerging focus on adolescent health within the global health community as we come to recognize that the adolescent years are formative in determining health and health-related behaviours across the life-course. Such attention is not only relevant on the global scale but is imperative in Canada as well.

Main body: This commentary provides a brief review of recent investments targeting global adolescent health and presents five potential avenues for action which emerged out of the recent Canadian Partnership for Women and Children’s Health (CanWaCH) Global Adolescent Health conference. These avenues are: (1) Demand data; (2) Embrace complexity; …

Rsv Associated Hospitalizations In Children In Karachi, Pakistan: Implications For Vaccine Prevention Strategies, Syed Asad Ali, Mohammad Tahir Yousafzai, Rabbia Waris, Fatima Jafri, Fatima Aziz, Imran Naeem Abbasi, Anita K. M. Zaidi

Department of Paediatrics and Child Health

Major progress is being made in vaccines against Respiratory Syncytial Virus (RSV), with multiple vaccine candidates currently in the clinical phase of development. Making an investment case for public sector financing of RSV vaccine will require estimation of burden, cost-effectiveness, and impact. The aim of this study is to determine the proportion, age distribution and clinical spectrum of RSV associated hospitalizations in children in Karachi, Pakistan. A three years prospective study was conducted at the Aga Khan University Hospital in Karachi, a city of 20 million in south Pakistan, from August 2009 to June 2012. Children less than five years …

Age And Sex Normalization Of Intestinal Permeability Measures For The Improved Assessment Of Enteropathy In Infancy And Early Childhood: Results From The Mal-Ed Study, Margaret N. Kosek, Gwenyth O. Lee, Richard L. Guerrant, Rashidul Haque, Gagandeep Kang, Tahmeed Ahmed, Pascal Bessong, Syed Asad Ali, Shahida Qureshi, Anita K. M. Zaidi

Department of Paediatrics and Child Health

Objectives: The aim of the study was to describe changes in intestinal permeability in early childhood in diverse epidemiologic settings.
Methods: In a birth cohort study, the lactulose:mannitol (L:M) test was administered to 1980 children at 4 time points in the first 24 months of life in 8 countries. Data from the Brazil site with an incidence of diarrhea similar to that seen in the United States and no growth faltering was used as an internal study reference to derive age- and sex-specific z scores for mannitol and lactulose recoveries and the L:M ratio.
Results: A total of 6602 tests …

Case-Control Vaccine Effectiveness Studies: Data Collection, Analysis And Reporting Results, Jennifer R. Verani, Abdullah H. Baqui, Claire V. Broome, Thomas Cherian, Cheryl Cohen, Jennifer L. Farrar, Daniel R. Feikin, Michelle J. Groome, Rana A. Hajjeh, Anita K. M. Zaidi

Department of Paediatrics and Child Health

The case-control methodology is frequently used to evaluate vaccine effectiveness post-licensure. The results of such studies provide important insight into the level of protection afforded by vaccines in a 'real world' context, and are commonly used to guide vaccine policy decisions. However, the potential for bias and confounding are important limitations to this method, and the results of a poorly conducted or incorrectly interpreted case-control study can mislead policies. In 2012, a group of experts met to review recent experience with case-control studies evaluating vaccine effectiveness; we summarize the recommendations of that group regarding best practices for data collection, analysis, …

Case-Control Vaccine Effectiveness Studies: Preparation, Design, And Enrollment Of Cases And Control, Jennifer R. Verani, Abdullah H. Baqui, Claire V. Broome, Thomas Cherian, Cheryl Cohen, Jennifer L. Farrar, Daniel R. Feikin, Michelle J. Groome, Rana A. Hajjeh, Anita K. M. Zaidi

Department of Paediatrics and Child Health

Case-control studies are commonly used to evaluate effectiveness of licensed vaccines after deployment in public health programs. Such studies can provide policy-relevant data on vaccine performance under 'real world' conditions, contributing to the evidence base to support and sustain introduction of new vaccines. However, case-control studies do not measure the impact of vaccine introduction on disease at a population level, and are subject to bias and confounding, which may lead to inaccurate results that can misinform policy decisions. In 2012, a group of experts met to review recent experience with case-control studies evaluating the effectiveness of several vaccines; here we …

Determinants And Impact Of Giardia Infection In The First 2 Years Of Life In The Mal-Ed Birth Cohort, Elizabeth T. Rogawski, Luther A. Bartelt, James A. Platts-Mills, Jessica C. Seidman, Amidou Samie, Alexandre Havt, Sudhir Babji, Shahida Qureshi, Sadia Shakoor, Zulfiqar Ahmed Bhutta

Department of Paediatrics and Child Health

Background: Giardia are among the most common enteropathogens detected in children in low-resource settings. We describe here the epidemiology of infection with Giardia in the first 2 years of life in the Etiology, Risk Factors, and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development Project (MAL-ED), a multisite birth-cohort study.
Methods: From 2089 children, 34916 stool samples collected during monthly surveillance and episodes of diarrhea were tested for Giardia using an enzyme immunoassay. We quantified the risk of Giardia detection, identified risk factors, and assessed the associations with micronutrients, markers of gut inflammation and …

Setting Health Research Priorities Using The Chnri Method: Vii. A Review Of The First 50 Applications Of The Chnri Method, Igor Rudan, Sachiyo Yoshida, Kit Yee Chan, Devi Sridhar, Kerri Wazny, Harish Nair, Aziz Sheikh, Mark Tomlinson, Joy E. Lawn, Zulfiqar Ahmed Bhutta

Department of Paediatrics and Child Health

Background: Several recent reviews of the methods used to set research priorities have identified the CHNRI method (acronym derived from the "Child Health and Nutrition Research Initiative") as an approach that clearly became popular and widely used over the past decade. In this paper we review the first 50 examples of application of the CHNRI method, published between 2007 and 2016, and summarize the most important messages that emerged from those experiences.
Methods: We conducted a literature review to identify the first 50 examples of application of the CHNRI method in chronological order. We searched Google Scholar, PubMed and so-called …

Prioritizing Research For Integrated Implementation Of Early Childhood Development And Maternal, Newborn, Child And Adolescent Health And Nutrition Platforms, Renee Sharma, Michelle F. Gaffey, Harold Alderman, Diego G. Bassani, Kimber Bogard, Gary L. Darmstadt, Jai K. Das, Joseph E De Graft–Johnson, Jena D. Hamadani, Susan Horton

Department of Paediatrics and Child Health

Background: Existing health and nutrition services present potential platforms for scaling up delivery of early childhood development (ECD) interventions within sensitive windows across the life course, especially in the first 1000 days from conception to age 2 years. However, there is insufficient knowledge on how to optimize implementation for such strategies in an integrated manner. In light of this knowledge gap, we aimed to systematically identify a set of integrated implementation research priorities for health, nutrition and early child development within the 2015 to 2030 timeframe of the Sustainable Development Goals (SDGs).
Methods: We applied the Child Health and Nutrition …

Comprehensive Review Of The Evidence Regarding The Effectiveness Of Community-Based Primary Health Care In Improving Maternal, Neonatal And Child Health: 8. Summary And Recommendations Of The Expert Panel, Robert E. Black, Carl E. Taylor, Shobha Arole, Abhay Bang, Zulfiqar Ahmed Bhutta, A Mushtaque R. Chowdhury, Betty R. Kirkwood, Nazo Kureshy, Claudio F. Lanata, James F. Phillips

Department of Paediatrics and Child Health

Background: The contributions that community-based primary health care (CBPHC) and engaging with communities as valued partners can make to the improvement of maternal, neonatal and child health (MNCH) is not widely appreciated. This unfortunate reality is one of the reasons why so few priority countries failed to achieve the health-related Millennium Development Goals by 2015. This article provides a summary of a series of articles about the effectiveness of CBPHC in improving MNCH and offers recommendations from an Expert Panel for strengthening CBPHC that were formulated in 2008 and have been updated on the basis of more recent evidence.
Methods: …

Conflict In South Asia And Its Impact On Health, Siddarth David, Rukhsana Gazi, Mohammed Shafiq Mirzazada, Chesmal Siriwardhana, Sajid Bashir Soofi, Nobhojit Roy

Department of Paediatrics and Child Health

South Asia has a large population affected by different types of protracted conflict and can provide critical insights to understand health challenges in conflict zones.
Health systems in conflict affected areas should prioritise domestic and gender-based violence, along with reproductive and sexual health services.
Mental health and psychosocial services for conflict-affected populations in South Asia need to be strengthened, and these services should be integrated into existing primary care platforms.
Building the capacity of the existing healthcare system and developing a trained local workforce can improve the access to and availability and acceptability of health services in conflict-affected communities.
Research …

Causal Pathways From Enteropathogens To Environmental Enteropathy: Findings From The Mal-Ed Birth Cohort Study, Margaret N. Kosek, Zulfiqar Ahmed Bhutta, Anita K. M. Zaidi, Imran Ahmed, Syed Asad Ali, Muneera Rasheed, Sajid Bashir Soofi, Ali Turab, Didar Alam, Shahida Qureshi

Department of Paediatrics and Child Health

Background: Environmental enteropathy (EE), the adverse impact of frequent and numerous enteric infections on the gut resulting in a state of persistent immune activation and altered permeability, has been proposed as a key determinant of growth failure in children in low- and middle-income populations. A theory-driven systems model to critically evaluate pathways through which enteropathogens, gut permeability, and intestinal and systemic inflammation affect child growth was conducted within the framework of the Etiology, Risk Factors and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development (MAL-ED) birth cohort study that included children from eight countries. …

Vaccine Coverage And Adherence To Epi Schedules In Eight Resource Poor Settings In The Mal-Ed Cohort Study, Christel Hoest, Jessica C. Seidman, Gwenyth Lee, James A. Platts-Mills, Syed Asad Ali, Maribel Paredes Olortegui, Pascal Bessong, Ram Chandyo, Sudhir Babji, Venkata Raghava Mohan

Department of Paediatrics and Child Health

Background: Launched in 1974, the Expanded Program on Immunization (EPI) is estimated to prevent two-three million deaths annually from polio, diphtheria, tuberculosis, pertussis, measles, and tetanus. Additional lives could be saved through better understanding what influences adherence to the EPI schedule in specific settings.
Methods: The Etiology, Risk Factors and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development (MAL-ED) study followed cohorts in eight sites in South Asia, Africa, and South America and monitored vaccine receipt over the first two years of life for the children enrolled in the study. Vaccination histories were obtained …