La prématurité, définie par une naissance avant 37 semaines d’aménorrhées (SA), est une cause majeur de mortalité et de morbidité infantile. Comparés aux enfants nés à terme, les prématurés font face à des risques importants de troubles moteurs et cognitifs durant l'enfance, ainsi que de maladies chroniques et décès prématurés à l’âge adulte. La prématurité constitue un enjeu important de santé publique et en Europe, les taux varient entre 5 et 10%. Notre objectif pour cette thèse était de mieux comprendre les sources d’hétérogénéité des taux à l’échelle des pays. Dans un premier temps, nous avons effectué une revue exhaustive de la littérature qui montre que les caractéristiques maternelles, les pratiques médicales, et les méthodes d'estimation de l'âge gestationnel ont un impact sur les taux de prématurité. Cependant, ces facteurs n'expliquent pas l’ampleur des différences observées entre les pays. Puis, en utilisant des données sur les femmes enceintes, les nouveau-nés et les mort-nés dans 34 pays à revenus élevés de 1996 à 2010, nous avons établi que: 1) les différences d'enregistrement des naissances dans les pays à revenus élevés ont un impact limité sur les taux, sauf pour les naissances à 22-23 SA, 2) les tendances de PTB dans les pays sont associées à des variations plus importantes dans la distribution des âges gestationnels 3) et enfin, en utilisant les données d'un échantillon représentatif des naissances en France en 2010, qu’il existe des facteurs de risques maternels prénatals et socio-démographiques communs aux naissances avant terme (<37SA) et proche du terme à 37-38 SA. Viser à réduire les facteurs de risques de la naissance proche du terme et de la prématurité dans une approche conjointe pourrait apporter un nouvel élan à la prévention de la prématurité. Comparés aux enfants prématurés, les enfants nés proche du terme sont individuellement moins à risque, mais à l’échelle des pays ces enfants représentent environ une naissance sur quatre et ils contribuent de manière importante au fardeau de morbi-mortalité néonatale et infantile. Au niveau national, élargir les efforts de prévention de la prématurité à cette nouvelle population-cible pourrait avoir un plus grand impact sur la santé publique. / Preterm birth (PTB), defined as birth before 37 weeks, is a leading cause of infant mortality and morbidity. Compared to term infants, preterm infants face important risks of motor and cognitive impairments throughout childhood, as well as chronic diseases and premature death later in life. PTB represents a significant public health burden and in Europe, rates range between 5 and 10%. Such wide differences suggest that reductions may be possible, but there are few effective interventions, and these tend to target selected groups of high-risk pregnancies, based on clinical risk factors. Our aim for this thesis was to better appraise sources of population-level PTB rate variations and trends. First, we conducted an exhaustive review of the literature and found that maternal characteristics, reproductive policies, medical practices and methods of gestational age (GA) estimation affected PTB rates, but could not explain observed differences across countries. Next, using population-based data on pregnant women, newborns and stillbirths in 34 high-income countries from 1996 to 2010, we showed that: 1) reporting criteria for births and deaths affected PTB rates at early gestations and PTB rankings, but differences between countries with high and low rates are not just due to artefact 2) PTB trends were associated with broader shifts in countries’ gestational age GA distribution of births, and 3) using data from a representative sample of births in France in 2010, that there were shared maternal prenatal and socio-demographic risk factors for deliveries that did not reach full term, at 39 weeks GA. Our work confirms that recording differences in high-income countries have a limited impact on PTB rate variations. However, a broader focus on earlier delivery, including early term birth at 37-38 weeks, could shed light on the determinants of low PTB rates and provide a useful public health prevention paradigm.

BACKGROUND: Despite large investments in maternity care services, perinatal health outcomes in the U.S. are among the worst compared to other industrialized countries, with documented perinatal health disparities disproportionately impacting racial and ethnic minorities. Midwifery-led freestanding birth centers (FSBC) have emerged as an underutilized model for the safe and cost-effective care of women with low-risk pregnancies. Despite approximately 85% of all US pregnancies being considered low-risk, only 0.5% of all US births occurred in a FSBC in 2016. The goal of the study is to elucidate strategies used to develop and sustain freestanding birth centers (FSBCs) that are seeking to serve high proportions of publicly-insured women and women of color. METHODS: I conducted an embedded unit case study, including semi-structured in-depth interviews and focus groups with 49 stakeholders from three exemplary FSBCs. Supplemental interviews were led with five key informants from three additional FSBCs and a relevant national membership organization. Additional data sources used to complete this case study include, where relevant and permitted, observations of maternity care settings, patient-provider encounters, management meetings, community events, and review of pertinent documents. Qualitative analysis methods were used to identify common themes and variations. FINDINGS: Midwifery-led birth center care can improve the experience and outcomes of maternity care among publicly insured women of color. The study revealed persistent multi-level challenges, as well as the use of common approaches to overcome these organizational, financial, and cultural barriers, resulting in greater, yet still fragile, access to family-centered intrapartum care within the communities in which these FSBCs operate. CONCLUSIONS: The careful integration of FSBCs into health systems such as a Federally Qualified Health Center (FQHC) may contribute to the broad scale-up of this underutilized model of care. While integrating FSBCs into FQHCs may be helpful in expanding equitable access to birth center care, it is not necessary, and also not sufficient. Expansion efforts should include additional deliberate processes and strategies to ensure equitable uptake and sustainability of birth center care. / 2020-10-23T00:00:00Z

Cette thèse a été réalisée en cotutelle Université de Montréal (UdeM) - Université Libre de Bruxelles (ULB). L'auteur a bénéficié de bourses doctorales provenant du Fonds national de la recherche scientifique (FNRS-Belgique), du Fonds de recherche du Québec-Société culture (FRQSC), et du Centre de recherche Léa-Roback sur les inégalités de santé de Montréal. / Les politiques de soutien au revenu des ménages se déclinent sous formes de mesures variées mises en place dans le cadre du système de protection sociale. Ces politiques influencent considérablement le revenu et les conditions de vie des ménages les plus vulnérables. Elles constituent un levier majeur pour réduire la pauvreté et les inégalités de revenu entre ménages. De ce fait, elles contribuent à améliorer la santé des populations et à réduire les inégalités sociales de santé (ISS) dès la naissance. L’évaluation de l’impact des politiques sociales sur les ISS dans différents contextes constitue une tâche complexe, du fait notamment de la difficulté, voire l’impossibilité, de mettre en place des études randomisées à grande échelle. Les variations des politiques sociales selon les pays constituent des opportunités pour mener des études comparatives sur base d’expériences naturelles. En partant d’un constat sur les limites des études comparatives habituelles, nous avons proposé une démarche de recherche visant à mieux étudier les spécificités des contextes afin d’expliquer les mécanismes par lesquels la combinaison des politiques de soutien au revenu influence la pauvreté des ménages et contribue aux ISS à la naissance à Bruxelles et à Montréal. Ce protocole de recherche a fait l’objet d’un 1er article. Le cœur de la thèse comprend trois parties. La première partie porte sur la comparaison des politiques d’aide sociale et d’allocations familiales en Belgique et au Québec et analyse les impacts sur l’intensité de la pauvreté des ménages à l’aide sociale dans les deux contextes. L’analyse se base sur la méthode des familles-types. Cette méthode consiste à calculer et comparer le revenu disponible de différents types de ménages. L’intensité de la pauvreté des ménages a été estimée selon le nombre d’enfants et la situation de couple. Pour chaque type de ménage, elle correspond à la différence relative entre le revenu disponible du ménage et le seuil de pauvreté relative. Les résultats montrent une intensité de la pauvreté plus marquée au Québec qu’en Belgique. Dans chaque contexte, on constate également que l’intensité de la pauvreté des ménages varie considérablement selon le nombre d’enfants et la situation de couple. Ce travail a fait l’objet d’un 2ème article. La deuxième partie porte sur la description des inégalités de santé à la naissance à Bruxelles et à Montréal. Les hypothèses de travail découlent des résultats obtenus à l’étape précédente. Deux études de cas ont été réalisées et analysées dans une perspective comparative. Les bases de données utilisées proviennent du couplage de données administratives issues des registres de naissance et des données de sécurité sociale. Les résultats ont donné lieu aux 3ème et 4ème articles. Le 3ème article concerne la population générale. Dans chaque région, des modèles de régression logistique ont été élaborés afin d’étudier l’association entre les issues défavorables de la grossesse (faible poids à la naissance, prématurité) et le statut socioéconomique (éducation de la mère et revenu). L’ampleur des inégalités de santé est plus marquée à Montréal qu’à Bruxelles et celles-ci diffèrent également selon l’origine de la mère. Le 4ème article porte spécifiquement sur la population bénéficiaire de l’aide sociale. Il compare l’association entre le faible poids à la naissance et la composition de ménage dans chaque région. On constate que les inégalités face au FPN varient selon le nombre d’enfants et la situation de couple entre les deux contextes, dans le même sens que les différences observées au niveau de la pauvreté. La troisième partie explore davantage les différences constatées à l'étape précédente selon l’immigration. Dans chaque région, elle compare l’impact du SES sur la santé périnatale chez différents groupes d’immigrés et les chez les mères nées en Belgique ou au Canada. Les résultats ont donné lieu aux 5ème et 6ème article de la thèse. L’analyse souligne l’importance de tenir compte des enjeux liés à l’immigration pour mieux expliquer la contribution des politiques de soutien au revenu aux ISS à la naissance. Cette thèse constitue une contribution unique. Dans deux régions où les taux de pauvreté et les prévalences des issues de la grossesse sont comparables dans la population générale, on constate des différences notables quant aux inégalités de santé à la naissance. Les politiques de soutien au revenu dans les deux contextes contribuent à expliquer ces différences. L’analyse démontre la nécessité de remédier aux insuffisances de ces politiques dans les deux contextes. Finalement, elle souligne les défis de la réduction de la pauvreté. Ces défis touchent à différents domaines, notamment la conciliation travail-famille, le marché du travail, l’immigration et les inégalités économiques. Mots-clés : Pauvreté, Inégalités sociales de santé, Politiques sociales, Etat-Providence, Evaluation d’impact en santé, Expériences naturelles, Inégalités de revenu, Faible poids à la naissance, Santé périnatale, Politiques de soutien au revenu. / Income support policies significantly influence the income and living conditions of the most vulnerable households. They constitute a major lever for reducing poverty and income inequalities between households. As a result, they contribute to improving the health of populations and reducing social inequalities in health (SIH) starting from birth. Assessing the impact of social policies on SIH in different contexts is a complex task, due in particular to the difficulty, if not impossibility, of setting up large-scale randomised studies. Varying social policies in different countries provide opportunities for comparative studies on the issue, based on natural experiments. Starting from an observation on the limitations of the usual comparative studies, we have proposed a research approach aiming to better study the specificities of contexts, which would allow us to explain the mechanisms by which the combination of income support policies influences household poverty and contributes to SIH at birth in Brussels and Montreal. This research protocol was the subject of a first article. This core of this thesis consists of three parts. The first deals with the comparison of welfare and family allowance policies in Belgium and Quebec and analyses their impact on the intensity of poverty of welfare households in both contexts. The analysis is based on the model family method, which consists of calculating and comparing the disposable income of different types of households. The intensity of household poverty was estimated according to the number of children and marital status. For each household type, the intensity of poverty corresponds to the relative difference between the household's disposable income and the relative poverty threshold. The results show a higher intensity of poverty in Quebec than in Belgium. It is also found that, in each context, the intensity of household poverty varies considerably depending on the number of children and marital status. This work was the subject of a second article. The second part of this thesis focuses on the description of health inequalities at birth in Brussels and Montreal. The working hypotheses are derived from the results obtained in the previous stage. Two case studies were carried out and analysed in a comparative perspective. The databases used come from a combination of administrative data from birth records and social security data. The results led to the third and fourth articles. The third article concerns itself with the general population. Logistic regression models were developed for each region to study the association between adverse pregnancy outcomes (low birth weight, prematurity) and socioeconomic status (mother's education and income levels). The magnitude of health inequalities is greater in Montreal than in Brussels and also differs according to the mother's origin. The fourth article focuses specifically on welfare recipients. It compares the association between low birth weight and household composition in each region. We can see that inequalities in LBW vary according to the number of children and marital status in both contexts, much like the differences observed in terms of poverty. The third part further explores the differences observed in the previous stage according to immigration. It compares the impact of SES on perinatal health among different immigrant groups and among mothers born in Belgium or Canada. The results led to the fifth and sixth papers of the thesis. The analysis underlines the importance of taking the specific issues linked to immigration into account to better explain the role that income support policies play in SIH at birth. This thesis is a unique contribution. There are notable differences in health inequalities at birth between two regions with similar poverty rates and levels of prevalence of unfavourable pregnancy outcomes among the general population. The impact of income support policies in Belgium and Quebec on the intensity of household poverty helps explain these differences. Our analysis demonstrates the need for public policies that address the inadequacy of the current income support measures in both regions. Lastly, it emphasises that the causes of poverty are interdependent and touch on various issues, including work-family balance, job insecurity, immigration and economic inequalities. Keywords: Poverty, Social inequalities in health, Social policies, Welfare state, Health impact assessment, Natural experiments, Income inequalities, Low birth weight, Perinatal health, Income support policies.

“Why do immigrants and refugees need community health workers/lay health workers (CHWs) if Canada already has a universal health care system?” Abundant evidence demonstrates that despite the universality of our health care system marginalized populations, including immigrants and refugees, experience barriers to accessing the health system. Evidence on the role of CHWs facilitating access is both lacking and urgently needed. This dissertation contributes to this evidence by providing a thick description and thorough analytical exploration of a CHW model, in Edmonton, Canada. Specifically, I examine the activities of the Multicultural Health Brokers Co-operative (MCHB Co-op) and its Multicultural Health Brokers from 1992 to 2011 as well as the relationship they have with Alberta Health Services (AHS) Edmonton Zone Public Health. The research for this study is based on an instrumental and embedded qualitative case study design. The case is the MCHB Co-op, an independently-run multicultural health worker co-operative, which contracts with health and social services providers in Edmonton to offer linguistically- and culturally-appropriate services to marginalized immigrant and refugee women and their families. The two embedded mini-cases are two programs of the MCHB Co-op: Perinatal Outreach and Health for Two, which are the raison d’être for a sustained partnership between the MCHB Co-op and AHS. The phenomenon under study is the Multicultural Health Brokers’ practice. I triangulate multiple methods (research strategies and data sources), including 46 days of participant and direct observation, 44 in-depth interviews (with Multicultural Health Brokers, mentors, women using the programs, health professionals and outsiders who knew of the work of the MCHB Co-op and Multicultural Health Brokers), and document review and analysis of policy documents, yearly reports, training manuals, educational materials as well as quantitative analysis of the Health Brokers’ 3,442 client caseload database. In addition, data include my field notes of both descriptive and analytical reflections taken throughout the onsite research. I also triangulate various theoretical frameworks to explore how historically specific social structures, economic relationships, and ideological assumptions serve to create and reinforce the conditions that give rise to the need for CHWs, and the factors that aid or hinder their ability to facilitate marginalized populations’ access to health and social services. Findings reveal that Multicultural Health Brokers facilitate access to health and social services as well as foster community capacity building in order to address settlement, adaptation, and integration of immigrant and refugee women and their families into Canadian society. Findings also demonstrate that the Multicultural Health Broker model is an example of collaboration between community-based organizations and local systems in targeting health equity for marginalized populations; in particular, in perinatal health and violence against women. A major problem these workers face is they provide important services as part of Canada’s health human resources workforce, but their contributions are often not recognized as such. The triangulation of methods and theory provides empirical and theoretical understanding of the Multicultural Health Brokers’ contribution to immigrant and refugee women and their families’ feminist urban citizenship.

“Why do immigrants and refugees need community health workers/lay health workers (CHWs) if Canada already has a universal health care system?” Abundant evidence demonstrates that despite the universality of our health care system marginalized populations, including immigrants and refugees, experience barriers to accessing the health system. Evidence on the role of CHWs facilitating access is both lacking and urgently needed. This dissertation contributes to this evidence by providing a thick description and thorough analytical exploration of a CHW model, in Edmonton, Canada. Specifically, I examine the activities of the Multicultural Health Brokers Co-operative (MCHB Co-op) and its Multicultural Health Brokers from 1992 to 2011 as well as the relationship they have with Alberta Health Services (AHS) Edmonton Zone Public Health. The research for this study is based on an instrumental and embedded qualitative case study design. The case is the MCHB Co-op, an independently-run multicultural health worker co-operative, which contracts with health and social services providers in Edmonton to offer linguistically- and culturally-appropriate services to marginalized immigrant and refugee women and their families. The two embedded mini-cases are two programs of the MCHB Co-op: Perinatal Outreach and Health for Two, which are the raison d’être for a sustained partnership between the MCHB Co-op and AHS. The phenomenon under study is the Multicultural Health Brokers’ practice. I triangulate multiple methods (research strategies and data sources), including 46 days of participant and direct observation, 44 in-depth interviews (with Multicultural Health Brokers, mentors, women using the programs, health professionals and outsiders who knew of the work of the MCHB Co-op and Multicultural Health Brokers), and document review and analysis of policy documents, yearly reports, training manuals, educational materials as well as quantitative analysis of the Health Brokers’ 3,442 client caseload database. In addition, data include my field notes of both descriptive and analytical reflections taken throughout the onsite research. I also triangulate various theoretical frameworks to explore how historically specific social structures, economic relationships, and ideological assumptions serve to create and reinforce the conditions that give rise to the need for CHWs, and the factors that aid or hinder their ability to facilitate marginalized populations’ access to health and social services. Findings reveal that Multicultural Health Brokers facilitate access to health and social services as well as foster community capacity building in order to address settlement, adaptation, and integration of immigrant and refugee women and their families into Canadian society. Findings also demonstrate that the Multicultural Health Broker model is an example of collaboration between community-based organizations and local systems in targeting health equity for marginalized populations; in particular, in perinatal health and violence against women. A major problem these workers face is they provide important services as part of Canada’s health human resources workforce, but their contributions are often not recognized as such. The triangulation of methods and theory provides empirical and theoretical understanding of the Multicultural Health Brokers’ contribution to immigrant and refugee women and their families’ feminist urban citizenship.

“Why do immigrants and refugees need community health workers/lay health workers (CHWs) if Canada already has a universal health care system?” Abundant evidence demonstrates that despite the universality of our health care system marginalized populations, including immigrants and refugees, experience barriers to accessing the health system. Evidence on the role of CHWs facilitating access is both lacking and urgently needed. This dissertation contributes to this evidence by providing a thick description and thorough analytical exploration of a CHW model, in Edmonton, Canada. Specifically, I examine the activities of the Multicultural Health Brokers Co-operative (MCHB Co-op) and its Multicultural Health Brokers from 1992 to 2011 as well as the relationship they have with Alberta Health Services (AHS) Edmonton Zone Public Health. The research for this study is based on an instrumental and embedded qualitative case study design. The case is the MCHB Co-op, an independently-run multicultural health worker co-operative, which contracts with health and social services providers in Edmonton to offer linguistically- and culturally-appropriate services to marginalized immigrant and refugee women and their families. The two embedded mini-cases are two programs of the MCHB Co-op: Perinatal Outreach and Health for Two, which are the raison d’être for a sustained partnership between the MCHB Co-op and AHS. The phenomenon under study is the Multicultural Health Brokers’ practice. I triangulate multiple methods (research strategies and data sources), including 46 days of participant and direct observation, 44 in-depth interviews (with Multicultural Health Brokers, mentors, women using the programs, health professionals and outsiders who knew of the work of the MCHB Co-op and Multicultural Health Brokers), and document review and analysis of policy documents, yearly reports, training manuals, educational materials as well as quantitative analysis of the Health Brokers’ 3,442 client caseload database. In addition, data include my field notes of both descriptive and analytical reflections taken throughout the onsite research. I also triangulate various theoretical frameworks to explore how historically specific social structures, economic relationships, and ideological assumptions serve to create and reinforce the conditions that give rise to the need for CHWs, and the factors that aid or hinder their ability to facilitate marginalized populations’ access to health and social services. Findings reveal that Multicultural Health Brokers facilitate access to health and social services as well as foster community capacity building in order to address settlement, adaptation, and integration of immigrant and refugee women and their families into Canadian society. Findings also demonstrate that the Multicultural Health Broker model is an example of collaboration between community-based organizations and local systems in targeting health equity for marginalized populations; in particular, in perinatal health and violence against women. A major problem these workers face is they provide important services as part of Canada’s health human resources workforce, but their contributions are often not recognized as such. The triangulation of methods and theory provides empirical and theoretical understanding of the Multicultural Health Brokers’ contribution to immigrant and refugee women and their families’ feminist urban citizenship.