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The rise of multiple births in Brazil

SILVA, Clecio Homrich da; GOLDANI, Marcelo Zubaran; SILVA, Antonio Augusto de Moura; AGRANONIK, Marilyn; BETTIOL, Heloisa; BARBIERI, Marco Antonio; RONA, Roberto
Fonte: WILEY-BLACKWELL Publicador: WILEY-BLACKWELL
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
37.11%
Aim: The aim of this study was to assess the rise in multiple births and its influence on trends of low birth weight (LBW) rates in Porto Alegre, Brazil. Methods: This is a registry-based study of live births from 1994 to 2005 obtained from the national live birth information system. Chi-square tests for trends were assessed for LBW and multiple birth rates. The impact of multiple births on LBW trends was assessed by sequential modelling, including year and further adjustment for multiple births. Risk factors for multiple births were assessed using the Poisson regression. Results: A total of 263 252 live births were studied. The LBW rate increased from 9.70% to 9.88% (p < 0.001) and the multiple birth rate rose from 1.95% to 2.53% (p < 0.001). LBW rate increased among twins, from 57.14% to 63.46% (p = 0.001). The twin birth rate rose by 24.7%, while the rate of triplets or higher-order increased by 150%. Multiple births may be responsible for 23.9% of the increase in the LBW rate over the period. Mothers with higher levels of schooling, older mothers and mothers delivering in private hospitals were more likely to deliver multiple births. Conclusions: It seems that both the increase in multiple births and in the LBW among multiple births contributed to this rise in overall LBW rate.

Análise espacial dos aglomerados de nascimentos ocorridos em hospitais SUS e não SUS no município de São Paulo, 2008; Spatial analysis of the clusters of births which occurred in hospitals of the Brazilian Unified Health System (SUS) and others (non-SUS) in the São Paulos city in 2008.

Santos, Patricia Carla dos
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 26/04/2012 PT
Relevância na Pesquisa
36.86%
Introdução: São Paulo é uma megacidade com ocupação espacial heterogênea e desigualdades em saúde. Objetivos: Verificar se há aglomerados de nascidos vivos em hospitais SUS e não SUS e estudar as distâncias entre as residências das mães até os hospitais de parto. Métodos: Foi realizado um estudo com nascidos vivos (NV) de mães residentes e ocorridos em oito hospitais (4 SUS e 4 não-SUS) de alta complexidade do município de SP, em 2008. As informações foram obtidas da base de dados das declarações de nascido vivo unificada SEADE/SES e as bases cartográficas do Centro de Estudos da Metrópole. Foi empregado estimador de intensidade de Kernel para identificar aglomerados espaciais. A distância teórica entre residências maternas até o hospital do parto foi obtida em linha reta. Resultados: Os NV estudados representaram 27,8 por cento do total do MSP. Os NV dos hospitais SUS formaram 3 aglomerados, situados em distritos periféricos. A distância média percorrida entre a residência materna e o hospital do parto foi de 9,2 km para os NV de hospitais SUS e de 9,9 km para os não-SUS. Verificou-se uma proporção maior de mães de alta escolaridade (12,8 vezes), com mais de 35 anos de idade (3,2 vezes), nascimentos com 7 ou mais consultas de pré-natal (1...

Cesariana e gestação múltipla : avaliação de seus impactos sobre a saúde infantil

Agranonik, Marilyn
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
27.03%
Introdução: O Brasil está passando por uma transição demográfica e epidemiológica, com melhorias na área da saúde. Apesar desse cenário, as taxas de baixo peso ao nascer (BPN) e a mortalidade infantil permanecem altas. O objetivo deste estudo é avaliar o impacto do uso extensivo de tecnologias, como o parto cesáreo e a concepção assistida, sobre resultados perinatais, durante os últimos 16 anos. Esse objetivo foi dividido em duas partes: (1) avaliação do impacto do aumento da taxa de parto cesáreo no BPN, de acordo com tipo de hospital (privado, público ou misto) e (2) avaliação do impacto das taxas de nascimentos múltiplos nas taxas de mortalidade infantil. Métodos: Estudo observacional de todos os nascidos vivos registrados entre 1996 e 2011, em Porto Alegre (RS). Características maternas, do parto, de assistência e do recém-nascido foram obtidas através do Sistema de Informações sobre Nascidos Vivos (SINASC). Informações sobre a mortalidade foram obtidas a partir do Sistema de Informações sobre Mortalidade (SIM), apenas no período de 1996-2010. No estudo do BPN, os nascimentos múltiplos foram excluídos. A análise de tendência foi realizada através de modelos de regressão joinpoint. A Regressão de Poisson foi utilizada para calcular o risco relativo para BPN ao longo do período...

Exploring the peaks and valleys in the number of births in Portugal

Caleiro, António
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
36.77%
In spite of the remarkable downward trend in fertility that characterizes Portugal, birth seasonality is still evident. A time series analysis of the data shows that, in general, May and September are months where more births take place and that December and February are the months with the lowest figures. In particular, the September peak in births, which is the most remarkable result, is shown to be related to end-of-year (economic) expectations.

What proportion of multiple births are due to ovulation induction? A register-based study in Italy.

Corchia, C; Mastroiacovo, P; Lanni, R; Mannazzu, R; Currò, V; Fabris, C
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /06/1996 EN
Relevância na Pesquisa
27.14%
OBJECTIVES: This study evaluated the increase in risk of multiple births associated with ovulation induction and calculated the proportion of multiple births attributable to this treatment. METHODS: Cases were 350 multiple births and controls were 737 single births enrolled from April 1993 to March 1994 in the Mercurio Project, an investigation of reproductive outcomes in Italy. RESULTS: Ovulation induction was used in 45 case births (12.9%) and 24 control births (3.3%); the adjusted odds ratio was 4.1 (95% confidence interval [CI] = 2.4, 6.9). The odds ratio for triplet or higher order births was 72.2 (95% CI = 25.7, 202.8). When unlike-sexed multiple births were considered, the odds ratio increased for twin births, but not for triplet or higher births. The highest odds ratios were found when ovulation induction was used with assisted reproduction. The proportion of multiple births attributable to ovulation induction was 9.7% overall, 5.4% for twin births, and 69.8% for triplet or higher births. CONCLUSIONS: Ovulation induction increases the risk of multiple births and has been responsible for the rise in the rate of triplet or higher order births in Italy in the last decade. Its indiscriminate and improper use should be avoided.

Home births in England and Wales, 1979: perinatal mortality according to intended place of delivery.

Campbell, R; Davies, I M; Macfarlane, A; Beral, V
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 22/09/1984 EN
Relevância na Pesquisa
27.03%
A survey was carried out of all 8856 births occurring at home in England and Wales in 1979. Of these births, 67% had been booked for delivery at home, 21% had been booked for delivery in hospital, 3% had not been booked, and for 9% the intended place of delivery was unknown. The perinatal mortality varied almost 50-fold according to the intended place of delivery, ranging from 4.1/1000 births in those booked for delivery at home to 196.6/1000 unbooked births. Deliveries that occurred at home but had been booked for a hospital consultant unit were associated with a perinatal mortality of 67.5/1000. Births that had been booked for delivery at home included the smallest proportion of babies of low birth weight: 2.5% weighed 2500 g or less compared with 18% of those booked for consultant units and 29% of those not booked. Within these low birthweight groups there were noticeable differences in perinatal mortality; births booked to occur at home had the lowest mortality and unbooked births had the highest. Perinatal mortality among babies who weighed more than 2500 g was generally low irrespective of the intended place of delivery; the only exception was in babies whose delivery had not been booked. In all groups perinatal mortality was considerably higher in nulliparous than parous women. Women booking a delivery at home are clearly a selected group...

Neonatal mortality in Missouri home births, 1978-84.

Schramm, W F; Barnes, D E; Bakewell, J M
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /08/1987 EN
Relevância na Pesquisa
27.08%
A study was conducted of 4,054 Missouri home births occurring from 1978 through 1984. Of the 3,645 births whose planning status was identified, 3,067 (84 per cent) were planned to be at home. Neonatal mortality was elevated for both planned (17 observed deaths vs 8.59 expected deaths) and unplanned home births (45 observed vs 33.19 expected) compared with physician-attended hospital births. Nearly all of the mortality excess for planned home births occurred in association with lesser trained attendants (12 observed vs 4.42 expected), while for unplanned home births the excess was entirely among infants weighing 1500 grams or more (19 observed vs 3.50 expected). For planned home births attended by physicians, certified nurse-midwives, or Missouri Midwife Association recognized midwives, there was little difference between observed and expected deaths (5 observed vs 3.92 expected). There also was little difference in deaths for unplanned home births weighing less than 1500 grams (26 observed vs 29.69 expected) compared with hospital births. The study provides evidence of the importance of having skilled attendants present at planned home births.

Reduced risk of low weight births among indigent women receiving care from nurse-midwives

Visintainer, P.; Uman, J.; Horgan, K.; Ibald, A.; Verma, U.; Tejani, N.
Fonte: BMJ Group Publicador: BMJ Group
Tipo: Artigo de Revista Científica
Publicado em /03/2000 EN
Relevância na Pesquisa
27.06%
STUDY OBJECTIVE—To examine the effect of a comprehensive prenatal and delivery programme administered by nurse-midwives on the risk of low weight births among indigent women.
STUDY DESIGN—Historical prospective study. Birth outcomes among the cohort were compared with all county births during the same period, adjusting for maternal age and race. Results are expressed as relative risks with 95% confidence intervals.
SETTING—An enhanced Medicaid funded pre-natal programme administered by nurse-midwives from 1992 to 1994 in Westchester County, New York.
PARTICIPANTS—Indigent mothers (n=1443), between the ages of 15 and 44, who were residents of Westchester County and indicated having Medicaid or no health care coverage.
RESULTS—There were 1474 live births among cohort mothers. Mean (SD) gestational age was 39.4 (1.9) weeks. Less than 6% of births occurred before 37 weeks gestation. The mean birth weight of cohort infants was 3365.6 (518.6) g. Only 4.1% of the cohort births were less than 2500 g. Compared with all county births, the cohort showed a 41% reduction in the risk of low weight births (RRlbw=0.59, 95%CI: 0.46 to 0.73, p<.001 ) and a 56% reduction when compared with county Medicaid births only (RR=0.44...

Declining male births with increasing geographical latitude in Europe

Grech, V.; Vassallo-Agius, P; Savona-Ventura, C.
Fonte: BMJ Group Publicador: BMJ Group
Tipo: Artigo de Revista Científica
Publicado em /04/2000 EN
Relevância na Pesquisa
27.03%
OBJECTIVE—Demographic studies in various industrialised countries have shown a decline in male births in the latter half of the 20th century from the expected ratio of 0.515 (males/total). This study analyses trends in this ratio over the period 1890 to 1995 in Malta, and also analyses this ratio for Western European countries for the period 1990-1995.
DESIGN—Births subdivided by sex were obtained from official Maltese publications. European countries were grouped according to geographical latitude by banding countries into three groups: Northern Mediterranean, Central European and Scandinavian. Births by sex for these countries were also analysed for the period 1990-1995.
RESULTS—No decline in the ratio of male births to total births was noted in Malta over the period 1916-1995. However, the ratio was higher than expected (n=151 766, ratio=0.517(95% confidence intervals (95%CI): 0.514, 0.519). Moreover, during the period 1890-1899 (n=66 874), the ratio was 0.523 (95% CI: 0.519, 0.527), even higher than observed during the 20th century (χ2=8.3, p=0.004). Analysis of European births showed a much higher ratio of male births in the south of Europe than in the north (χ2=87.2, p<0.0001).
CONCLUSIONS—The findings were unable to explain the higher incidence of male births in the south of Europe...

Recent Trends in the Incidence of Multiple Births and Its Consequences on Perinatal Problems in Korea

Choi, Sun Hee; Park, Young Sil; Shim, Kye Shik; Choi, Yong Sung; Chang, Ji Young; Hahn, Won Ho; Bae, Chong-Woo
Fonte: The Korean Academy of Medical Sciences Publicador: The Korean Academy of Medical Sciences
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
27.11%
The aim of this study was to survey multiple birth data and to analyze the recent trends of multiple births and its consequences on perinatal problems in Korea from 1991 to 2008. Data were obtained from the Korean Statistical Information Service. The total number of multiple births showed increasing trends. The multiple birth rate was maintained within less than 10.0 for the decade from 1981 to 1990. However, it increased gradually to reach 27.5 in 2008. The maternal age for multiple births was higher than for total live births. The mean birth weight of the total live births was 3.23 kg; for the multiple births it was 2.40 kg in 2008. The incidence of low birth weight infants (LBWI) among total live births was 3.8% in 2000 and 4.9% in 2008. For multiple births it was 49.2% and 53.0% during the same years. The incidence of preterm births among total live births was 3.8% in 2000 and 5.5% in 2008; for the multiple births it was 38.3% and 51.5% during the same years. The incidence of multiple births and its consequences on perinatal problems (preterm, LBWI, and advanced-maternal age) have been increased steadily over the last two decades in Korea.

Looking Back: Marriage, Divorce and Out-of-Wedlock Births

Aiyagari, S. Rao ; Greenwood, Jeremy (1953 - ); Guner, Nezih
Fonte: Universidade de Rochester Publicador: Universidade de Rochester
Tipo: Trabalho em Andamento
ENG
Relevância na Pesquisa
36.64%
This note was a section in an early version (circa 1997) of Aiyagari, Greenwood and Guner (Journal of Political Economy, April, 2000).; A very brief historical discussion of marriage, divorce, and out-of-wedlock births in England and France.

Breastfeeding, lactational infecundity, contraception and the spacing of births: implications of the Bellagio Consensus Statement

Bracher, Michael
Fonte: Health Transition Centre, National Centre for Epidemiology and Population Health, The Australian National University Publicador: Health Transition Centre, National Centre for Epidemiology and Population Health, The Australian National University
Tipo: Artigo de Revista Científica Formato: 79208 bytes; application/pdf
EN_AU
Relevância na Pesquisa
36.64%
While the nutritional, immunological and anti-bacterial benefits of breast milk are incontestable, the contraceptive effect of breastfeeding is more apparent in the aggregate than at the level of the individual. Nevertheless, it has recently been recommended that lactating women not consider adopting contraception until the earliest of their first post-partum menstruation, the introduction of supplementary feeding or their child’s reaching six months of age. This article employs microsimulation to quantify the implications of this recommendation for the spacing of births and, in particular, for the proportion of birth intervals that are unacceptably short. The findings are not encouraging. The implementation of this protocol would not produce better birth spacing than a simpler strategy of initiating contraception early in the post-partum period and, unless implemented perfectly, the outcomes would be considerably worse. Breastfeeding should be viewed not as a method of birth control but as the best form of infant nourishment. Efficient contraception is the best way to ensure that children in modernizing societies can reap the benefits of breastfeeding, without being endangered by being weaned too early because of a new pregnancy.; yes

Planned home and hospital births in South Australia, 1991-2006: differences in outcomes

Kennare, R.; Keirse, M.; Tucker, G.; Chan, A.
Fonte: Australasian Med Publ Co Ltd Publicador: Australasian Med Publ Co Ltd
Tipo: Artigo de Revista Científica
Publicado em //2010 EN
Relevância na Pesquisa
27.12%
Objective: To examine differences in outcomes between planned home births, occurring at home or in hospital, and planned hospital births. Design and setting: Population-based study using South Australian perinatal data on all births and perinatal deaths during the period 1991–2006. Analysis included logistic regression adjusted for predictor variables and standardised perinatal mortality ratios. Main outcome measures: Perinatal death, intrapartum death, death attributed to intrapartum asphyxia, Apgar score < 7 at 5 minutes, use of specialised neonatal care, operative delivery, perineal injury and postpartum haemorrhage. Results: Planned home births accounted for 0.38% of 300 011 births in South Australia. They had a perinatal mortality rate similar to that for planned hospital births (7.9 v 8.2 per 1000 births), but a sevenfold higher risk of intrapartum death (95% CI, 1.53–35.87) and a 27-fold higher risk of death from intrapartum asphyxia (95% CI, 8.02–88.83). Review of perinatal deaths in the planned home births group identified inappropriate inclusion of women with risk factors for home birth and inadequate fetal surveillance during labour. Low Apgar scores were more frequent among planned home births, and use of specialised neonatal care as well as rates of postpartum haemorrhage and severe perineal tears were lower among planned home births...

Analysis of binary outcomes from randomised trials including multiple births: when should clustering be taken into account?

Yelland, L.; Salter, A.; Ryan, P.; Makrides, M.
Fonte: Blackwell Publishing Ltd Publicador: Blackwell Publishing Ltd
Tipo: Artigo de Revista Científica
Publicado em //2011 EN
Relevância na Pesquisa
36.77%
Randomised trials involving infants from both single and multiple births present unique statistical challenges. A range of methods have been used to analyse such data, including standard methods which treat all infants as independent, and more complex methods which account for the dependence between outcomes of infants from the same pregnancy. Conflicting recommendations have been made regarding if and when this dependence, or clustering, should be taken into account in the analysis. We studied the performance of ordinary logistic regression, which ignores the clustering, compared with logistic generalised estimating equations (GEEs) and mixed effects models (MEMs), which account for the clustering, using real and simulated datasets. Ordinary logistic regression produced appropriate type I error and coverage rates, provided the dependence between outcomes of infants from the same pregnancy was small and the multiple birth rate was low, but performed poorly otherwise. The type I error rate increased and the coverage rate decreased as either the strength of the dependence or the multiple birth rate increased. In contrast, logistic GEEs maintained appropriate type I error and coverage rates across a wide range of settings. The performance of logistic MEMs varied depending on the setting and the estimation procedure used but was often similar to or better than ordinary logistic regression. We recommend using a method which takes the clustering into account when analysing datasets including infants from multiple births.; Lisa N. Yelland...

Accounting for multiple births in randomised trials: a systematic review

Yelland, L.N.; Sullivan, T.R.; Makrides, M.
Fonte: BMJ Publishing Group Publicador: BMJ Publishing Group
Tipo: Artigo de Revista Científica
Publicado em //2015 EN
Relevância na Pesquisa
37%
OBJECTIVES: Multiple births are an important subgroup to consider in trials aimed at reducing preterm birth or its consequences. Including multiples results in a unique mixture of independent and clustered data, which has implications for the design, analysis and reporting of the trial. We aimed to determine how multiple births were taken into account in the design and analysis of recent trials involving preterm infants, and whether key information relevant to multiple births was reported. DESIGN: We conducted a systematic review of multicentre randomised trials involving preterm infants published between 2008 and 2013. Information relevant to multiple births was extracted. RESULTS: Of the 56 trials included in the review, 6 (11%) excluded multiples and 24 (43%) failed to indicate whether multiples were included. Among the 26 trials that reported multiples were included, only one (4%) accounted for clustering in the sample size calculations and eight (31%) took the clustering into account in the analysis of the primary outcome. Of the 20 trials that randomised infants, 12 (60%) failed to report how infants from the same birth were randomised. CONCLUSIONS: Information on multiple births is often poorly reported in trials involving preterm infants...

China's far below replacement level fertility: a reality or illusion arising from underreporting of births?

Zhang, Guangyu
Fonte: Universidade Nacional da Austrália Publicador: Universidade Nacional da Austrália
Tipo: Thesis (PhD); Doctor of Philosophy (PhD)
EN
Relevância na Pesquisa
36.97%
How fast and how far China’s fertility declined in the 1990s has long been a matter of considerable debate, despite very low fertility consistently being reported in a number of statistical investigations over time. Most demographers interpreted this as a result of serious underreporting of births in population statistics, due to the family planning program, especially the program strengthening after 1991. Consequently, they suggested that fertility fell only moderately below-replacement level, around 1.8 children per woman from the early 1990s. But some demographers argued that surveys and census may have reflected a real decline of fertility even allowing for some underreporting of births, given the consistency between data sources and over time. They believed that fertility declined substantially in the 1990s, very likely in the range between 1.5 and 1.6 by the year 2000.¶ The controversy over fertility is primarily related to the problem of underreporting of births, in particular the different estimations of the extent of underreporting. However, a correct interpretation of fertility data goes far beyond the pure numbers, which calls for a thorough understanding of different data sources, the programmatic and societal changes that occurred in the 1990s...

Tajikistan - Improving Statistics for Children's Births and Deaths

World Bank
Fonte: World Bank Publicador: World Bank
Tipo: Economic & Sector Work :: Other Health Study
ENGLISH
Relevância na Pesquisa
36.77%
The Government of Tajikistan has identified improving maternal and child health (MCH) as key priorities in its new Health Sector Strategy for 2010-2020. The Government recognizes that improving MCH outcomes is critical to achieve the Millennium Development Goals (MDG) for maternal and child health over the next four years. Tajikistan's data on most of the MDG indicators for maternal and child health can be improved significantly. The Government's ability to track its progress and to take action to ensure the achievement of its MDGs will be considerably bolstered by access to reliable data on childbirths, child mortality and others factors that affect these outcomes. To improve data reporting, data collection needs to be consistent in its methods and sources, which is currently not the case. As a result, health facilities and national agencies' reports diverge significantly from the results of nationally representative surveys. With this in mind, the study therefore set out to identify the main factors affecting two specific areas of Tajikistan's Health Information System-namely the child birth and death registration system as well as the possible steps to address them. The analysis reveals a number of issues that are key constraints to the further development of the vital statistics system in Tajikistan...

Cohort Trends in Premarital First Births: What Role for the Retreat From Marriage?

England, Paula; Wu, Lawrence L.; Shafer, Emily Fitzgibbons
Fonte: PubMed Publicador: PubMed
Tipo: Text
Publicado em /12/2013 EN
Relevância na Pesquisa
27.03%
We examine cohort trends in premarital first births for U.S. women born between 1920 and 1964. The rise in premarital first births is often argued to be a consequence of the retreat from marriage, with later ages at first marriage resulting in more years of exposure to the risk of a premarital first birth. However, cohort trends in premarital first births may also reflect trends in premarital sexual activity, premarital conceptions, and how premarital conceptions are resolved. We decompose observed cohort trends in premarital first births into components reflecting cohort trends in (1) the age-specific risk of a premarital conception taken to term; (2) the age-specific risk of first marriages not preceded by such a conception, which will influence women’s years of exposure to the risk of a premarital conception; and (3) whether a premarital conception is resolved by entering a first marriage before the resulting first birth (a “shotgun marriage”). For women born between 1920–1924 and 1945–1949, increases in premarital first births were primarily attributable to increases in premarital conceptions. For women born between 1945–1949 and 1960–1964, increases in premarital first births were primarily attributable to declines in responding to premarital conceptions by marrying before the birth. Trends in premarital first births were affected only modestly by the retreat from marriages not preceded by conceptions—a finding that holds for both whites and blacks. These results cast doubt on hypotheses concerning “marriageable” men and instead suggest that increases in premarital first births resulted initially from increases in premarital sex and then later from decreases in responding to a conception by marrying before a first birth.

Fatores de risco para nascimento de crianças pequenas para idade gestacional; Risk factors for small-for-gestational age births among infants in Brazil

Zambonato, Ana Maria Krusser; Pinheiro, Ricardo Tavares; Horta, Bernardo Lessa; Tomasi, Elaine
Fonte: Universidade de São Paulo. Faculdade de Saúde Pública Publicador: Universidade de São Paulo. Faculdade de Saúde Pública
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; Formato: application/pdf
Publicado em 01/02/2004 POR
Relevância na Pesquisa
36.86%
OBJETIVO: Determinar os fatores de risco para o nascimento de crianças pequenas para a idade gestacional. MÉTODOS: Nos meses de outubro a dezembro de 1996, cinco maternidades de Pelotas, RS, foram visitadas diariamente para entrevistar puérperas. O peso ao nascer foi obtido do registro dos berçários. A idade gestacional foi calculada a partir da data da última menstruação. Considerou-se como pequena para a idade gestacional (PIG) aquelas crianças cujo peso ao nascer, de acordo com o sexo e a idade gestacional, estava abaixo do percentil 10 da população de referência de Williams. O teste qui-quadrado foi usado nas análises bivariadas e a regressão logística, não-condicional, na análise multivariada. RESULTADOS: Foram estudadas 1.082 puérperas e a prevalência de nascimento PIG foi de 13,1%. Mesmo após controle para possíveis fatores de confusão, as crianças cuja renda familiar era; OBJECTIVE: To assess the risk factors for small-for-gestational-age (SGA) births. METHODS: All live births occurring in the city of Pelotas, Brazil, between October and December 1993 were identified and mothers interviewed soon after delivery. Birthweight was recorded by the maternity staff. Gestational age was obtained from the mothers' ´recall of their date of last menstrual period. SGA was defined as a birthweight below the 10th percentile for gestational age and sex...

Trends in the prevalence of adolescent births in Antigua and Barbuda over 35 years

Martin,TC; Doyle,B; Raphael,J
Fonte: West Indian Medical Journal Publicador: West Indian Medical Journal
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2008 EN
Relevância na Pesquisa
27.08%
A retrospective study was undertaken to determine trends in teenage births in Antigua and Barbuda from 1969 to 2003. Maternity Ward records were reviewed at Holberton Hospital, site of over 90% of deliveries in Antigua and Barbuda. Maternal age for all births were included. The estimated population in Antigua and Barbuda increased from 60 159 in 1969 to 69 866 in 1998, with no suspected change in age-group or gender distribution. Births to mothers 12-13, 14-15, 16-17 and 18-19 years old were analyzed separately. Yearly birth totals for the 10-year period from 1969 to 1973 and 1999 to 2003 were compared using student t test analysis. The total number of births averaged 1075 per year with no change in trend. For females aged 12 and 13 years, there was no change in births from 1969 to 1978 compared with 1994 to 2003. For females aged 14 years, there was a 54% drop; for females aged 15 years, a 59% drop; for females aged 16 years, a 53% drop; for females aged 17 years, a 51% drop; for females 18 years, a 37% drop and for females aged 19 years, a 30% drop, while births to mothers $ 20 years increased 25%. The decrease for all teen births was 42% from 1969-1978 to 1994-2003. Teen births accounted for 29% of all births at Holberton in 1969 to 1973 but only 16% of births in 1999 to 2003. In conclusion...