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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.
51

Catch-up de peso e índice de massa corporal em escolares de coortes de nascimento de duas cidades brasileiras / Catch-up in weight and body mass index in schoolchildren from two birth cohorts from brasiliam cities

SOUSA, Silvia Helena Cavalcante de 22 February 2017 (has links)
Submitted by Rosivalda Pereira (mrs.pereira@ufma.br) on 2017-08-21T18:59:25Z No. of bitstreams: 1 SilviaSousa.pdf: 2280503 bytes, checksum: a06b53b8d68a96973316e3b881bd15d6 (MD5) / Made available in DSpace on 2017-08-21T18:59:25Z (GMT). No. of bitstreams: 1 SilviaSousa.pdf: 2280503 bytes, checksum: a06b53b8d68a96973316e3b881bd15d6 (MD5) Previous issue date: 2017-02-22 / Introduction: Intrauterine growth restriction (IUGR) and preterm birth (PT) are considered to be public health problems in developing countries. The occurrence of catch-up favors the ability of these infants to obtain equivalent growth to that of infants born without IUGR and at term. Objective: To assess the influence of IUGR and of PT on the occurrence of catch-up in weight and BMI in schoolchildren from two birth cohorts from cities with contrasting socioeconomic conditions in the Northeast and Southeast of Brazil. Method: A total of 1,463 children were studied, from whom information was collected at birth and at school age in 1994 and 2004/2005 in Ribeirão Preto, SP (RP) and in 1997/1998 and 2005/2006 in São Luís, MA (SL). The response variable was defined as the difference in weight and BMI between the Z-score of the schoolchild and the Z-score at birth. A change in Z-score ≥ 0.67 was considered to be catch-up. The explanatory variable was divided into four categories: without IUGR and at term (NIUGR-T), only IUGR (IUGR-T), only PT (NIUGR-PT), and PT plus IUGR (IUGR-PT). Estimates of the relative risk for catch-up in weight were obtained by logistic regression in separate models for each city. Results: RP children had a greater proportion of both catch-up than SL children. In RP, 90.8% of IUGR-PT and 70.8% of NIUGR-PT (it was more frequent in pre-terms, restricted or not) caught up in weight at school age. In SL, the NIUGR-PT and IUGR-T caught up in a similar way. There was no difference between genders. Regarding marital status, in RP, no difference was found, however, in SL, the odds of catching up at 7 years old was 65% lower for those schoolchildren whose mothers did not have a partner. Having only one child, both in RP and in SL, increased almost twofold (OR=1.89 in RP and 1.83 in SL) the odds of the schoolchild catching up; and receiving up to 5 times the monthly minimum wage decreased by 50% the odds of catching up in SL, although no difference was found in RP. The head of the family’s occupation being unqualified manual labor or unemployed decreased by half the odds of catching up in both cities. Maternal age and education level were not associated to catchup in school age. Conclusion: In both cities, children born preterm with/without IUGR had a greater proportion of catch-up in weight and without IUGR and at term in BMI. / Introdução: A restrição de crescimento intrauterino (RCIU) e o nascimento pré-termo (PT) são considerados problemas de saúde pública nos países em desenvolvimento. A ocorrência de catch-up propicia que estes consigam equiparar seu crescimento ao das crianças nascidas sadias. Objetivo: Avaliar a influência da RCIU e do PT na ocorrência de catch-up de peso e IMC em escolares de duas coortes de nascimentos de cidades com condições socioeconômicas contrastantes. Método: Foram estudadas 1.463 crianças, cujas informações foram coletadas ao nascer e na idade escolar em 1994 e 2005/06 em Ribeirão Preto, SP (RP) e em 1997/98 e 2005/06 em São Luís, MA (SL). A variável resposta foi definida pela diferença entre o escore z do escolar e escore z ao nascimento do peso e IMC. Considerou-se como catch-up uma mudança de escore z de ≥ 0,67. A variável explanatória foi dividida em quatro categorias: sem RCIU e a termo (TNR), só RCIU (TR), só PT (PTNR) e PT com RCIU (PTR). Estimativas do risco relativo para catch-up de peso foram obtidas por regressão logística em modelos separados por cidade. Resultados: O fenômeno “catch-up” tanto de peso quanto de IMC foi mais evidente em RP para todas as categorias das chamadas condições de nascimento. Para ambas as cidades a maior incidência de catch-up de peso se deu para os PT e/ou com RCIU, já o de IMC para os TNR. Não houve diferença entre os sexos. Ter somente 1 filho, maior renda familiar e escolaridade materna além da ocupação do chefe mais qualificada aumentou a frequência do catch-up de peso e IMC em ambas as cidades. Conclusão: Não só condições biológicas ao nascer mas também as condições de vida, tais como, acesso aos serviços de saúde e melhor oferta de alimentos nas idades mais precoces da criança influenciam na ocorrência de catch-up de peso e IMC nas duas cidades estudadas.
52

Investigação de trombofilias em gestantes de risco para o parto prematuro / Investigation of thrombophilias in high risk pregnant patients for preterm birth.

Rades, Érica 30 May 2007 (has links)
Introdução: O parto prematuro espontâneo é doença multifatorial e sua etiologia permanece desconhecida em até 40% das vezes. Neste estudo, investigamos a existência de trombofilias maternas adquiridas e hereditárias em gestantes de risco para o parto prematuro espontâneo e as relacionamos com a incidência de prematuridade na gestação. Métodos: Neste estudo prospectivo, realizado entre julho de 2004 e setembro de 2006, foram pesquisadas 66 gestantes com antecedente de parto prematuro espontâneo e 66 gestantes sem antecedente de complicações, com pelo menos um parto a termo anterior. Até 25 semanas de gestação, foi realizada coleta única dos seguintes testes laboratoriais: anticardiolipina IgG, anticardiolipina IgM, anticoagulante lúpico, fator V Leiden, mutação da protrombina e homocisteína. Foram excluídas três gestantes por abortamento, duas por incompetência cervical, duas por malformação fetal, e uma por coleta inadequada. Dessa maneira, foram avaliadas 64 gestantes de risco e 60 sem complicações (grupo controle). Resultados: A incidência de prematuridade espontânea foi significantemente maior no grupo de risco (RR=7,97; IC95%=1,92-33,04, p<0,05). Não houve diferenças quanto ao tipo de parto nem quanto às médias dos pesos dos recém-nascidos entre os grupos. Entre as pacientes com antecedente de prematuridade, a presença de trombofilias adquiridas e hereditárias foi mais freqüente (OR=3,2; IC95%=1,4-7,5, p<0,05). As trombofilias adquiridas, quando analisadas em separado, foram mais freqüentes no grupo de risco (OR=3,0; IC95%=1,1-7,7, p<0,05), assim como, observou-se maior freqüência da anticardiolpina IgG em títulos baixos (OR=2,8; IC95%=1,0-7,5, p<0,05) e IgM em títulos intermediários ou altos (OR=3,9; IC95%=1,0-15,1, p<0,05). O anticoagulante lúpico e as trombofilias hereditárias, quando analisados em separado, não diferiram entre os grupos. Entre os casos com prematuridade espontânea na gestação atual, 79% apresentaram algum teste de trombofilia alterado. Na análise univariada, a presença de trombofilias aumentou o risco de prematuridade espontânea (OR=4,5; IC95%=1,4-14,4, p<0,05). Na análise multivariada, no entanto, o parto prematuro prévio esteve 11 vezes mais associado à prematuridade espontânea. Conclusões: Concluímos que as trombofilias adquiridas e hereditárias foram mais freqüentes no grupo de risco, sendo prevalentes as adquiridas, das quais a anticardiolpina IgG e IgM foram as mais freqüentemente encontradas. Houve aumento do risco de prematuridade espontânea nas portadoras de trombofilias adquiridas e hereditárias, mas o antecedente de parto prematuro permaneceu como o maior fator de risco associado à prematuridade espontânea. / Introduction: The spontaneous preterm birth is a multifactorial disease and its etiology remains unknown in 40% of the time. In this study, we investigated the acquired and inherited thrombophilias in high risk pregnant patients to the spontaneous preterm birth and related to the incidence of prematurity in the current pregnancy. Methods: In this prospective study realized from July of 2004 to September of 2006 was evaluated 66 pregnant women with previous spontaneous preterm birth and 66 pregnant women without complications, with at least one previous term birth. Until 25 weeks of pregnancy, was realized single collection of the following laboratorial tests: IgG/IgM anticardiolipin, lupus anticoagulant, factor V Leiden, prothrombin mutation and homocystein. It was excluded three pregnant women due to miscarriage, two for cervical incompetence, two for fetal malformation, and one for inadequated collection of exams. In this way, we evaluated 64 high risk pregnant women and 60 with no complications (control group). Results: The frequency of spontaneous preterm birth was significantly higher in the high risk group (RR=7,97; IC95%=1,92-33,04, p<0,05). There was neither differences in the birth type nor in the average weight in newborn infants between the groups. Among to the patients with risk of preterm birth in the current pregnancy, the acquired and inherited thrombophilias were more frequent (OR=3,2; IC95%=1,4-7,5, p<0,05). The acquired thrombophilias, when analysed in separately, were more frequents in the risk group (OR=3,0; IC95%=1,1-7,7, p<0,05), like it was observed more frequency of IgG anticardiolipin in low titles (OR=2,8; IC95%=1,0-7,5, p<0,05) and IgM anticardiolipin in intermediary or high titles (OR=3,9; IC95%=1,0-15,1, p<0,05). The lupus anticoagulant and the inherited thrombophilias when analysed separately were not different among groups. In spontaneous preterm birth cases in the current pregnancy, 79% had some altered thrombophilia test. In univariated analysis, the existence of thrombophilias increased the risk for spontaneous preterm birth (OR=4,5; IC95%=1,4-14,4, p<0,05). In multivariated analysis, however, the previous spontaneous preterm birth was 11 times more associated with current spontaneous preterm birth. Conclusions: We conclude that the acquired and inherited thrombophilias were more frequent in high risk group, being more prevalent the acquired ones, of which IgG anticardiolipin and IgM anticardiolipin were more frequently founded. There was increased risk for spontaneous preterm birth in women with acquired and inherited thrombophilias but the previous preterm birth remained the major risk factor related to the spontaneous preterm birth.
53

Estresse, violência, depressão e baixo suporte social durante a gestação e sua associação com parto pré-termo: avaliação de coorte de pré-natal em Ribeirão Preto / Stress, violence, depression and low social support during pregnancy and its association with preterm delivery: evaluation of prenatal cohort in Ribeirão Preto

Brito, Lívia Muzzi Diniz 12 January 2018 (has links)
O parto pré-termo, definido como nascimento antes de 37 semanas de gestação, é causa importante de morbidade e mortalidade neonatais, além de possíveis sequelas a longo prazo. Este trabalho trata-se de uma coorte prospectiva cujo objetivo foi analisar quatro possíveis fatores etiológicos do parto pré-termo: estresse, depressão, violência e baixo suporte social, baseado nos dados do projeto temático original: \"Fatores etiológicos do nascimento pré-termo e consequências dos fatores perinatais na saúde da criança: coortes de nascimentos em duas cidades brasileiras\". Um total de 1400 gestantes da cidade de Ribeirão Preto foram entrevistadas durante o pré- natal e logo após o parto, obtendo-se informações sobre história obstétrica e sócioeconômica, grau de estresse, depressão, apoio social e violência doméstica; dados do parto e do recém nascido. Foram identificados 133 (9,7%) partos prematuros, dentre estes 95 (6,9%) partos prematuros espontâneos, excluindo-se partos induzidos e cesarianas eletivas. Foram realizadas análises simples entre os possíveis fatores e também análises ajustadas a diversos itens da história social e obstétrica de cada gestante. O estresse e a depressão foram os dois únicos itens que mostraram associação com o desfecho prematuridade. O estresse foi o único fator que manteve a associação nos modelos ajustados de análise. Verificou-se um risco relativo bruto de 1,82 (IC 1,2 - 2,7) e de 1,60 a 1,75, nos modelos ajustados. O apoio social e histórico de violência física, sexual ou psicológica não mostraram interferência estatisticamente significativa no desfecho. Os resultados são consistentes com dados da literatura atual e apontam a importância de se observar certos sinais e sintomas durante o pré-natal, assim como discutir novas estratégias de acolhimento e tratamento, consequentemente prevenindo o parto pré-termo. / Preterm birth, defined as birth before 37 weeks of gestation, is an important cause of neonatal morbidity and mortality, as well as possible long-term sequelae. This work is a prospective cohort whose objective was to analyze four possible etiological factors of preterm birth: stress, depression, violence and low social support, based on data from the original thematic project: \"Etiologic factors of preterm birth and consequences of perinatal factors on child health: birth cohorts in two Brazilian cities \". A total of 1400 pregnant women from the city of Ribeirão Preto were interviewed during prenatal care and after delivery, obtaining information on obstetric and social history, stress level, depression, social support, domestic violence, birth data and type of delivery. A total of 133 (9.7%) preterm births were identified, of which 95 (6.9%) were spontaneous preterm births, excluding induced births and elective cesareans. Straight analyzes were performed with the possible etiological factors and also adjusted analyzes with several items of the social and obstetric history of each woman. Stress and depression were the only two items that demonstrated association with prematurity. Stress was the only factor that maintained the association in the adjusted models of analysis. There was a crude relative risk of 1.82 (CI 1.2-2.7) and 1.60-1.75 in the fitted models. The social support and history of physical, sexual or psychological violence did not show statistically significant interference in the outcome.The results are consistent with data from the current literature and point out the importance of observing certain signs and symptoms during prenatal care, as well as discussing new strategies for the diagnosis and treatment, consequently preventing preterm delivery
54

Toxic Air Discharge and Infant Mortality: Effects of Community Size and Socioeconomics

Salter, Khabira 01 January 2019 (has links)
Living in counties where manufacturers release environmental toxins, such as those tracked by the Environmental Protection Agency's (EPA) toxic release inventory (TRI), may elevate infants' health risks. Because infant mortality (IM) is a strong indicator of a population's health status, it is an important topic in public health research. The purpose of this research was to examine the potential relationships between IM, community size, and factors related to mothers' SES in counties where more than 25,000 pounds of annual toxic air releases occur. The dependent variable was IM per 1,000 live births in a given community for each of the 3 years included in this analysis (1987, 1995, and 2004). The independent variables included county size and factors related to mother's SES (education, age, ethnicity, and marital status). The theoretical framework consisted of Mosley and Chen's framework for exploring child survival. Archival, publicly available data were pulled from (a) the EPAs TRI data, and (b) linked birth and infant death files from the National Center for Health Statistics. The researcher followed a quantitative, retrospective cross-sectional design and conducted 3 linear regression models to test the research questions. Results indicated that an increase in community size was significantly associated with an increase in IM. Regarding the relationships between IM and the 4 different maternal characteristics (education, age, ethnicity, and marital status) included in the analysis, findings were mixed for the 3 years examined. Despite these unexpected findings, the overall results from this investigation, when considered alongside findings from previous research on IM, indicate that policy changes and interventions are needed to reduce socioeconomic disparities in IM, and to save the lives of more infants.
55

Importance of Perceived Social Support for Black Mothers of Preterm Babies

Brentley, Anita Lynn 01 January 2019 (has links)
Social support represents a network that provides for family, relatives, and friends and is an important predictor of future health and well-being. A knowledge gap exists in the literature regarding a need for social support for Black mothers of preterm babies. This qualitative study explored the perception of social support for Black mothers of preterm babies in Southwest Ohio. The phenomenological method of inquiry was used to gain an in-depth understanding of social support Black mothers receive after preterm birth. The social ecological theory provided a framework for understanding how individual, interpersonal, community, organizations, and policy affect a Black mother's perception of social support after preterm birth. NVivo was used to organize each data category for thematic analysis. The themes included (a) father of the baby, (b) help in times of need, (c) financial assistance, (d) government assistance, (e) lack of support, (f) mom and baby, (g) transition challenges, (h) depression, (i) acknowledging hospital support, (j) uncomfortable support, (k) unrelated support, and (l) increase in assistance. The findings indicate the lack of understanding of preterm birth and its long-term implications for a child, the need for additional interventions prior to discharge, and additional culturally appropriate training of healthcare staff. The study contributed to social change by increasing the understanding of researchers and health care professional regarding social support and improving transitions after preterm birth from hospital to home for Black mothers.
56

The Association of Maternal Health Literacy Levels and Preterm Birth

Moynihan, Aimee 01 January 2015 (has links)
According to the CDC, each year approximately 0.06 % of the world's population dies in infancy. The March of Dimes indicated that the leading causes of infant mortality include birth defects, preterm birth, low birth weight, sudden infant death syndrome, maternal complications of pregnancy, and respiratory distress syndrome, most of which are considered preventable with access to adequate prenatal care by mothers. The goal of this study was to examine the association between maternal health literacy levels and preterm birth. This research was based on the theoretical framework of the Interaction Model of Client Health Behavior. The hypothesis for this study was that reproductive-age women with low levels of maternal health literacy would be more likely to experience a preterm birth. In this case control study, cases were defined as women delivering before 37 weeks gestation. The REALM health literacy assessment tool was used in a sample of 169 women meeting the criteria; 56 fit the case criteria and 113 fit the control criteria. The data were analyzed in SPSS using logistic regression, with preterm birth as the dependent variable, and health literacy levels as the independent variable. When comparing mothers who delivered preterm to mothers that delivered term, there was no significance difference (p = 0.112) with respect to maternal health literacy. There was no association between low maternal health literacy levels, as assessed by the REALM instrument, and preterm birth for English-speaking women between the ages of 18 and 35 within the metropolitan Atlanta area. This study reinforces the need to reengage health practitioners to achieve a modest understanding of the principals of health literacy and the health literacy levels of their patients to assist in maternal health improvements. A focus on the development and implementation of educational competencies for clinicians on maternal health literacy would attribute to a positive social change.
57

The Physical Burden of Inequity: Stress, Allostatic Load, and Racial Disparities in Adverse Birth Outcomes

January 2013 (has links)
acase@tulane.edu
58

Anti-Mullerian hormone changes in pregnancy

Stegmann, Barbara Jean 01 July 2014 (has links)
When the delicate hormonal balance in early pregnancy is disrupted, the consequences can be significant. We have a poor understanding of the "cross-talk" in the fetal/placental/ovarian axis that occurs throughout pregnancy and is essential for normal fetal development. This lack of knowledge challenges our ability to recognize disruptions in this axis that may be a signal for future disease. As a result, our ability to apply preventive measures against adverse obstetric outcomes, such as preterm birth (PTB), are quite limited. Attempts to predict PTB using biomarkers of feto-placental health have been largely unsuccessful, but no one has considered the inclusion of ovarian biomarkers in these models. Anti-Mullerian hormone (AMH) is a biomarker of ovarian activity that has recently been found to decline in early pregnancy at a time that corresponds to the involution of the corpus luteum (CL). The signal for CL involution is believed to originate from the placenta; therefore, the AMH levels in pregnancy may reflect the degree of ovarian up or down-regulation based on feto-placental needs. As the major function of the CL in pregnancy is the production of progesterone, which acts as an anti-inflammatory agent in the placental bed, changes in CL-derived progesterone could result in higher or lower degrees of placental inflammation. Therefore, monitoring the changes in AMH levels may provide insight into the inflammatory state of the placenta which could then be used as a signal for possible adverse obstetric outcomes resulting from a pro-inflammatory state, such as PTB. The first aim of this project was to test the hypothesis of an association between AMH levels in early pregnancy and PTB risk. When the differences in AMH levels between the 1st and 2nd trimesters of pregnancy were stratified by the level of maternal serum alpha-fetoprotein (MSAFP) and controlled for maternal weight gain between trimesters, small or absent decreases in AMH levels were associated with a higher probability of preterm birth. However, when AMH was modeled alone, no significant associations were found. The need for changes in multiple biomarkers in the fetal/placental/ovarian axis suggests that a change is only significant if it can impact multiple axis points. Therefore, models that included two biomarkers from different part of the axis would find stronger associations than two biomarkers from a single point (e.g. two feto-placental biomarkers), and monitoring these changes may help identify women at risk for PTB. The strategy of the second aim was to determine if the changes in AMH levels in early pregnancy could be used to predict time to delivery. Again, only when the risks of AMH and MSAFP were combined was a significant, dose-dependent relationship found with time to delivery. In women with an MSAFP of >1 multiple of the median (MoM), smaller declines and/or elevations in AMH levels were significantly associated with shorter times to delivery. In fact, 19% of women in the highest risk group delivered prior to 32 weeks gestation compared to 7% in the lowest risk group, and all infants who delivered prior to 24 weeks gestation were in the highest risk category. Thus, the amount of change in the AMH level when MSAFP is elevated may reflect the level of disruption in the fetal/placental/ovarian axis, which can then be used to predict time to delivery. Finally, the third aim of this study was to determine if AMH levels were associated with a pro-inflammatory placental state other than PTB. The degree of placental inflammation is known to vary by fetal gender, with male placentas having higher levels of inflammation compared to female placentas. When AMH levels were compared between women with male vs. female fetuses in early pregnancy, 1st trimester AMH levels were found to be lower when carrying a male fetus. Further, sexually-dimorphic patterns in AMH levels were seen between genders when stratified by birth outcome (term vs. preterm delivery). The stronger ovarian response seen in women with female fetuses suggests a better survival function and may account for the discrepancies between PTB rates in males and females. This also strengthens our hypothesis that the dynamic changes in AMH levels reflect the degree of placental inflammation and the need for CL-derived progesterone. This project demonstrates that the changes in AMH levels may be representative of the cross-talk occurring in the fetal/placental/ovarian axis in early pregnancy. Further, changes in AMH levels may be an indication of the amount of inflammation in the placenta and the physiologic need for higher levels of progesterone to control this inflammatory state when considered along with MSAFP. Therefore, the consideration of AMH levels as a biomarker of ovarian activity along with biomarkers of feto-placental health may provide clinically useful information about the development of future diseases such as preterm birth.
59

Assay of Oral Polymorphonuclear Neutrophils for Assessment of Oral Inflammation in Pregnant Women

Huda, Sabrina 20 November 2012 (has links)
Background: A multitude of studies suggest an association between periodontal disease and adverse birth outcomes. Although the evidence is controversial, it is biologically plausible, and the key link maybe inflammation. Purpose: To correlate levels of periodontal disease as measured by conventional methods with PMN counts from an oral rinse in pregnant women. Methods: Sixty-three pregnant women were recruited. Periodontal examinations were carried out. Fifteen-second saline rinses were collected. ABTS, a colour changing redox agent was added to each rinse. The intensity of the colour reaction was measured by absorbance to count the oral PMNs. Results: A statistically significant difference in oral PMN counts was observed between those with periodontal disease and the healthy patients (P < .05). The sensitivity and specificity using the bleeding index was 0.94 and 0.76 respectively. Conclusions: The rinse assay can be used as a screening tool for periodontal disease and oral inflammation in pregnant women.
60

Assay of Oral Polymorphonuclear Neutrophils for Assessment of Oral Inflammation in Pregnant Women

Huda, Sabrina 20 November 2012 (has links)
Background: A multitude of studies suggest an association between periodontal disease and adverse birth outcomes. Although the evidence is controversial, it is biologically plausible, and the key link maybe inflammation. Purpose: To correlate levels of periodontal disease as measured by conventional methods with PMN counts from an oral rinse in pregnant women. Methods: Sixty-three pregnant women were recruited. Periodontal examinations were carried out. Fifteen-second saline rinses were collected. ABTS, a colour changing redox agent was added to each rinse. The intensity of the colour reaction was measured by absorbance to count the oral PMNs. Results: A statistically significant difference in oral PMN counts was observed between those with periodontal disease and the healthy patients (P < .05). The sensitivity and specificity using the bleeding index was 0.94 and 0.76 respectively. Conclusions: The rinse assay can be used as a screening tool for periodontal disease and oral inflammation in pregnant women.

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