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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Relationship Between Assisted Reproductive Technology and Risk of Stillbirth

Chang, Jeani 01 January 2017 (has links)
Assisted reproductive technology (ART) is an infertility treatment used to assist women to become pregnant. Although the procedure is safe, there are gaps in understanding the association between treatment and adverse pregnancy outcomes (e.g., stillbirth) in the United States. The purpose of this study was to investigate the relationship between stillbirth delivery and ART. The 2 research questions addressed the association between methods of conception (ART versus non-ART) and the delivery of a stillbirth, and the association between multiple gestation pregnancy and risk of stillbirths. Retrospective cohort data from the States Monitoring ART collaborative were analyzed using Pearson's chi squared tests and log binominal regression models. Findings indicated that from 2006 to 2011, the average stillbirth rates were lower among ART-conceived pregnancies than non-ART conceived pregnancies. After controlling for confounding factors, ART-conceived pregnancies did not show increased risks of stillbirths compared to non-ART conceived pregnancies regardless of plurality. This lower risk of stillbirth was particularly significant during early pregnancies, before 28 weeks of gestation. Findings may be used to improve understanding of the use of ART treatment and its associated pregnancy outcomes. Findings may also be used to prevent stillbirths and to improve prenatal care, early stillbirth detection, and effective clinical management of fetal and maternal conditions during pregnancy.
2

History of pregnancy termination as a risk factor for preterm birth, Virginia 2000-20007

Macdonald, Jennifer 01 May 2009 (has links)
Abstract Objectives: The objective of this study was to determine if an association exists between prior induced and prior spontaneous pregnancy termination (PIPT and PSPT) and preterm birth (PTB) of first live births in Virginia. Methods: Data was collected by linking maternal data from Virginia’s live birth and fetal death registries. All first live, singleton births occurring in Virginia from 2000-2007 were analyzed. Logistic regression models that controlled for various demographic, medical and obstetric history factors were used to determine associations among prior pregnancy termination types. Results: Compared with women who had no history of previous pregnancy terminations, women who had 1 (OR = 1.1, 95% CI 1.31, 1.53), 2 (OR = 1.2, 95% CI 1.12, 1.24) and 3 or more (OR = 1.4, 95% CI 1.07, 1.13) total prior pregnancy terminations had an increased odds of experiencing PTB. Increased odds of PTB were found for women who had 2 (OR = 1.1, 95% CI 1.05, 1.18) and 3 or more (OR = 1.3, 95% CI 1.39, 1.61) PIPTs. Women who reported 1, 2, 3 or more PSPT had PTB odds-ratios of 1.4 (95% CI 1.37, 1.50), 1.7 (95% CI 1.48, 1.98) and 3.0 (95% CI 2.09, 4.22) times, respectively. Conclusion: Two or more PIPT and one or more PSPT were found to be a significant risk factor for PTB of a first live birth in Virginia, and women having 3 or more PSPT had three times the odds of experiencing this outcome. Health practitioners should take this data into account to target research, education and action strategies to those high risk groups of women associated with obtaining induced terminations and to those women more susceptible to spontaneous termination of pregnancy.
3

Análise socioespacial dos nascimentos, óbitos neonatais e fetais ocorridos no município de São Paulo em 2010 / Socio-spatial analysis of births, neonatal and fetal deaths occurred in the city of São Paulo in 2010

Santos, Patricia Carla dos 19 January 2017 (has links)
Introdução - O estudo de eventos de saúde deve levar em conta que as características dos indivíduos de uma determinada localidade não constituem simples somatórios das medidas de cada um dos sujeitos e há que se considerar um modelo explicativo baseado em níveis de organização e na estrutura de dependência entre o nível individual e o nível de contexto onde esses sujeitos estão inseridos. Assim, a análise dos nascimentos e da mortalidade neonatal e fetal pode incorporar diferentes variáveis associadas ao contexto onde se expressam considerando a complexidade e as particularidades dessas ocorrências numa população e num espaço tão diverso. Metodologia - Foi realizado estudo transversal dos nascimentos, óbitos neonatais (<28 dias de vida) e óbitos fetais de mães residentes e ocorridos no município de São Paulo. Os endereços de residência materna foram geocodificados e foi calculada a distância entre as residências e o hospital de ocorrência. Além disso, cada indivíduo foi caracterizado com informações socioeconômicas do Censo Demográfico de 2010, segundo área de Ponderação. Os setores censitários de residência foram classificados segundo Índice Paulista de Vulnerabilidade Social IPVS. Os hospitais foram classificados em SUS e não SUS e para os Nascidos Vivos (e óbitos neonatais) também foram classificados segundo referência para atendimento de risco gestacional. Foram obtidos aglomerados de Nascidos Vivos (NV) através da técnica de varredura espacial. Através de análise multinível foi verificado o efeito do contexto socioeconômico na mortalidade neonatal e fetal. Resultados - Verificou-se que os aglomerados tanto SUS como não SUS não são homogêneos entres si, com diferenças em relação à idade das mães, escolaridade, número de consultas pré-natal e prematuridade. A distância média teórica percorrida pelas mães até o hospital foi 51,8% menor nos aglomerados SUS que nos não SUS. A menor distância nos nascimentos SUS indica a regionalização da assistência ao parto no município de São Paulo. Os resultados mostraram que há um aumento da taxa de mortalidade neonatal com o aumento da vulnerabilidade social. Houve um efeito contextual da vulnerabilidade social e observa-se que apenas as variáveis individuais que representam as características da gestação, recém-nascido e assistência pré-natal mostraram-se associadas à mortalidade neonatal. O efeito contextual da vulnerabilidade social nas variáveis individuais que representam as características da gestação, feto e escolaridade materna mostrou-se associadas à mortalidade fetal. Na modelagem multinível não foi observada variabilidade importante da mortalidade fetal entre os níveis. Conclusões - A detecção de aglomerados e sua caracterização socioeconômica das áreas contribuem para o entendimento do padrão de nascimentos e nas intervenções de saúde pública, proporcionando melhoria no atendimento das necessidades de acesso ao pré-natal e parto de forma mais eficiente. Os resultados em relação à mortalidade neonatal e fetal revelam que as desigualdades sociais estão presentes na cadeia causal desses dois desfechos e o que contribui com a compreensão dos fatores de risco para a mortalidade neonatal e fetal, principalmente no que diz respeito à participação da vulnerabilidade social na mortalidade e explicita a distância entre a residência materna e o hospital como um indicador socioeconômico / Introduction - The study of health events should take into account that the characteristics of the individuals of a given locality are not simple sums of the measures of each one of the subjects and it is necessary to consider an explanatory model based on levels of organization and the structure of dependence between the Individual level and the context level where these subjects are inserted. Thus, the analysis of neonatal and fetal births and mortality can incorporate different variables associated to the context considering the complexity and the peculiarities of these occurrences in a population and in such a diverse space. Methodology - A cross-sectional study of births, neonatal deaths (<28 days of life) and fetal deaths of resident mothers occurred in the city of. The maternal residence addresses were geocoded to calculate the distance between the residences and the hospital. In addition, each individual was characterized with socioeconomic information from the Demographic Census of 2010, according to the weighting areas. The census tracts of residence were classified according to Index of Social Vulnerability - IPVS. Hospitals were classified in SUS and non-SUS and for live births (and neonatal deaths) were also classified according to reference for gestational risk care. The clusters of live births (LB) were obtained through the spatial sweep technique. The effect of the socioeconomic context on neonatal and fetal mortality was verified by multilevel analysis. Results - It was verified that the clusters both SUS and non-SUS are not homogeneous between them, with differences in relation to the mothers\' age, schooling, number of prenatal consultations and prematurity. The mean theoretical distance traveled by the mothers to the hospital was 51.8% lower in the SUS clusters than in the non-SUS. The shorter distance in SUS births indicates the regionalization of childbirth care in the city of São Paulo. The results showed that there is an increase in the neonatal mortality rate with increased social vulnerability. There was a contextual effect of social vulnerability and it was observed that only the individual variables that represent the characteristics of gestation, newborn and prenatal care were shown to be associated with neonatal mortality. The contextual effect of social vulnerability on the individual variables that represent the characteristics of gestation, fetus and maternal schooling has been shown to be associated with fetal mortality. In the multilevel modeling whose context was the level of vulnerability of the place of maternal residence, no significant variability of fetal mortality between the levels was observed. Conclusion - The detection of clusters and their socioeconomic characterization of the areas contribute to the understanding of the birth pattern and the public health interventions, providing an improvement in the attendance of prenatal access and delivery needs in a more efficient way. The results in relation to neonatal and fetal mortality reveal that social inequalities are present in the causal chain of these two outcomes and that contributes to the understanding of the risk factors for neonatal and fetal mortality, especially with regard to the participation of social vulnerability In mortality and explicit the distance between the maternal residence and the hospital as a socioeconomic indicator
4

Análise socioespacial dos nascimentos, óbitos neonatais e fetais ocorridos no município de São Paulo em 2010 / Socio-spatial analysis of births, neonatal and fetal deaths occurred in the city of São Paulo in 2010

Patricia Carla dos Santos 19 January 2017 (has links)
Introdução - O estudo de eventos de saúde deve levar em conta que as características dos indivíduos de uma determinada localidade não constituem simples somatórios das medidas de cada um dos sujeitos e há que se considerar um modelo explicativo baseado em níveis de organização e na estrutura de dependência entre o nível individual e o nível de contexto onde esses sujeitos estão inseridos. Assim, a análise dos nascimentos e da mortalidade neonatal e fetal pode incorporar diferentes variáveis associadas ao contexto onde se expressam considerando a complexidade e as particularidades dessas ocorrências numa população e num espaço tão diverso. Metodologia - Foi realizado estudo transversal dos nascimentos, óbitos neonatais (<28 dias de vida) e óbitos fetais de mães residentes e ocorridos no município de São Paulo. Os endereços de residência materna foram geocodificados e foi calculada a distância entre as residências e o hospital de ocorrência. Além disso, cada indivíduo foi caracterizado com informações socioeconômicas do Censo Demográfico de 2010, segundo área de Ponderação. Os setores censitários de residência foram classificados segundo Índice Paulista de Vulnerabilidade Social IPVS. Os hospitais foram classificados em SUS e não SUS e para os Nascidos Vivos (e óbitos neonatais) também foram classificados segundo referência para atendimento de risco gestacional. Foram obtidos aglomerados de Nascidos Vivos (NV) através da técnica de varredura espacial. Através de análise multinível foi verificado o efeito do contexto socioeconômico na mortalidade neonatal e fetal. Resultados - Verificou-se que os aglomerados tanto SUS como não SUS não são homogêneos entres si, com diferenças em relação à idade das mães, escolaridade, número de consultas pré-natal e prematuridade. A distância média teórica percorrida pelas mães até o hospital foi 51,8% menor nos aglomerados SUS que nos não SUS. A menor distância nos nascimentos SUS indica a regionalização da assistência ao parto no município de São Paulo. Os resultados mostraram que há um aumento da taxa de mortalidade neonatal com o aumento da vulnerabilidade social. Houve um efeito contextual da vulnerabilidade social e observa-se que apenas as variáveis individuais que representam as características da gestação, recém-nascido e assistência pré-natal mostraram-se associadas à mortalidade neonatal. O efeito contextual da vulnerabilidade social nas variáveis individuais que representam as características da gestação, feto e escolaridade materna mostrou-se associadas à mortalidade fetal. Na modelagem multinível não foi observada variabilidade importante da mortalidade fetal entre os níveis. Conclusões - A detecção de aglomerados e sua caracterização socioeconômica das áreas contribuem para o entendimento do padrão de nascimentos e nas intervenções de saúde pública, proporcionando melhoria no atendimento das necessidades de acesso ao pré-natal e parto de forma mais eficiente. Os resultados em relação à mortalidade neonatal e fetal revelam que as desigualdades sociais estão presentes na cadeia causal desses dois desfechos e o que contribui com a compreensão dos fatores de risco para a mortalidade neonatal e fetal, principalmente no que diz respeito à participação da vulnerabilidade social na mortalidade e explicita a distância entre a residência materna e o hospital como um indicador socioeconômico / Introduction - The study of health events should take into account that the characteristics of the individuals of a given locality are not simple sums of the measures of each one of the subjects and it is necessary to consider an explanatory model based on levels of organization and the structure of dependence between the Individual level and the context level where these subjects are inserted. Thus, the analysis of neonatal and fetal births and mortality can incorporate different variables associated to the context considering the complexity and the peculiarities of these occurrences in a population and in such a diverse space. Methodology - A cross-sectional study of births, neonatal deaths (<28 days of life) and fetal deaths of resident mothers occurred in the city of. The maternal residence addresses were geocoded to calculate the distance between the residences and the hospital. In addition, each individual was characterized with socioeconomic information from the Demographic Census of 2010, according to the weighting areas. The census tracts of residence were classified according to Index of Social Vulnerability - IPVS. Hospitals were classified in SUS and non-SUS and for live births (and neonatal deaths) were also classified according to reference for gestational risk care. The clusters of live births (LB) were obtained through the spatial sweep technique. The effect of the socioeconomic context on neonatal and fetal mortality was verified by multilevel analysis. Results - It was verified that the clusters both SUS and non-SUS are not homogeneous between them, with differences in relation to the mothers\' age, schooling, number of prenatal consultations and prematurity. The mean theoretical distance traveled by the mothers to the hospital was 51.8% lower in the SUS clusters than in the non-SUS. The shorter distance in SUS births indicates the regionalization of childbirth care in the city of São Paulo. The results showed that there is an increase in the neonatal mortality rate with increased social vulnerability. There was a contextual effect of social vulnerability and it was observed that only the individual variables that represent the characteristics of gestation, newborn and prenatal care were shown to be associated with neonatal mortality. The contextual effect of social vulnerability on the individual variables that represent the characteristics of gestation, fetus and maternal schooling has been shown to be associated with fetal mortality. In the multilevel modeling whose context was the level of vulnerability of the place of maternal residence, no significant variability of fetal mortality between the levels was observed. Conclusion - The detection of clusters and their socioeconomic characterization of the areas contribute to the understanding of the birth pattern and the public health interventions, providing an improvement in the attendance of prenatal access and delivery needs in a more efficient way. The results in relation to neonatal and fetal mortality reveal that social inequalities are present in the causal chain of these two outcomes and that contributes to the understanding of the risk factors for neonatal and fetal mortality, especially with regard to the participation of social vulnerability In mortality and explicit the distance between the maternal residence and the hospital as a socioeconomic indicator

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