Abstract:
:We estimated the accuracy of a non-invasive, inexpensive method (the Chinese lunar calendar, CLC) to predict the sex of a baby from around the time of conception, using 2,840,755 singleton births occurring in Sweden between 1973 and 2006. Maternal lunar age and month of conception were estimated, and used to predict each baby's sex, according to a published algorithm. Kappa statistics were estimated for the actual vs. the CLC-predicted sex of the baby. Overall kappa was 0.0002 [95% CI -0.0009, 0.0014]. Accuracy was not modified by year of conception, maternal age, level of education, body mass index or parity. In a validation subset of 1000 births in which we used a website-customised algorithm to estimate lunar dates, kappa was -0.02 [95% CI -0.08, 0.04]. Simulating the misuse of the method by failing to convert Gregorian dates into lunar did not change the results. We conclude that the CLC method is no better at predicting the sex of a baby than tossing a coin and advise against painting the nursery based on this method's result.
journal_name
Paediatr Perinat Epidemioljournal_title
Paediatric and perinatal epidemiologyauthors
Villamor E,Dekker L,Svensson T,Cnattingius Sdoi
10.1111/j.1365-3016.2010.01129.xsubject
Has Abstractpub_date
2010-07-01 00:00:00pages
398-400issue
4eissn
0269-5022issn
1365-3016pii
PPE1129journal_volume
24pub_type
杂志文章abstract::To estimate maternal age effects on the rates of vaginal birth after caesarean delivery (VBAC), the related maternal complications and patient election to attempt VBAC, we conducted a secondary analysis of a retrospective cohort study of women who were offered VBAC from 1996 to 2000 in 17 community and university hosp...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章,多中心研究
doi:10.1111/j.1365-3016.2007.00794.x
更新日期:2007-03-01 00:00:00
abstract:BACKGROUND:Previous studies of the association between tobacco smoke and hearing loss in children are limited, involve small samples and are cross-sectional. We investigated the association of maternal smoking during pregnancy and exposure to tobacco smoke at age 4 months with hearing impairment at age 3 years in child...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12477
更新日期:2018-09-01 00:00:00
abstract::Retrospective reports of smoking in pregnancy are of importance for clinical or scientific purposes. Careful analyses of stability and accuracy of recalled behaviour are, therefore, needed. In 1998, the mothers of 2369 pre-teens born in Sweden retrospectively reported their smoking behaviour during the first trimester...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2007.00917.x
更新日期:2008-03-01 00:00:00
abstract:BACKGROUND:The public health objective for cerebral palsy (CP) in the United States is to reduce the percentage of children with CP who were born low birthweight (LBW, <2500 g) by 10% between 2006 and 2020. This study reports the prevalence of CP in a constant surveillance area for the years 2006, 2008, and 2010 and de...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12299
更新日期:2016-09-01 00:00:00
abstract::The study, aiming to document the effect of continued support for mothers on frequency of exclusive breast feeding, was carried out by inclusion of breast feeding counselling in the context of well-baby care. One hundred and forty-six mothers who had been exposed to two educational sessions on breast feeding after del...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.1991.tb00714.x
更新日期:1991-07-01 00:00:00
abstract:BACKGROUND:Severe maternal morbidity (SMM) has increased in the United States by 45% in the last decade. While the recurrence of several adverse pregnancy outcomes from one pregnancy to the next has been established, the recurrence risk of SMM is unknown. OBJECTIVE:To determine whether women who have SMM in a first pr...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12714
更新日期:2020-11-06 00:00:00
abstract::Singleton survivors born to multigravidae in the whole island of Jamaica in 2 months (September-October 1986) were compared with singleton perinatal deaths occurring to multigravidae throughout the island in the 12-month period September 1986 to August 1987. Past obstetric history was obtained from the mothers using a...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.1994.tb00490.x
更新日期:1994-04-01 00:00:00
abstract::Asians are often considered a single group in epidemiological research. This study examines the extent of differences in maternal risks and birth outcomes for six Asian subgroups. Using linked birth/infant death certificate data from the State of California for the years 1992-97, we assessed maternal socio-economic ri...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2006.00737.x
更新日期:2006-07-01 00:00:00
abstract::Length of postnatal hospital stay has declined dramatically since the 1970s, with ongoing controversy about potential harmful effects. Three population-based surveys of recent mothers conducted in the State of Victoria, Australia have been analysed to assess the impact of shorter length of stay on breast feeding and w...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2004.00558.x
更新日期:2004-05-01 00:00:00
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journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章,随机对照试验
doi:10.1111/j.1365-3016.2009.01088.x
更新日期:2010-01-01 00:00:00
abstract::We used 1.4 million fetal death and birth certificates filed in Georgia between 1980 and 1992 to construct 369,686 chains of two or more reproductive events occurring to the same woman. We evaluated these chains using both information on the certificates and information independently collected in interviews with 1311 ...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.1997.tb00799.x
更新日期:1997-01-01 00:00:00
abstract::Male genital tract birth defects have been associated in previous studies with several prenatal exposures to environmental and dietary risk factors. The purpose of this study was to explore the association between hypospadias and cryptorchidism, and the dietary habits of an agricultural population in Italy. A populati...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2007.00918.x
更新日期:2008-05-01 00:00:00
abstract::Longer-term follow-up of infants with specific health concerns, such as low birthweight, is critical to assessing the effect of medical interventions. This report examines the approach of reconstructing previously studied cohorts in terms of the factors discriminating between respondents and non-respondents. Follow-up...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.1991.tb00727.x
更新日期:1991-10-01 00:00:00
abstract::There is conflicting evidence concerning the relationship between breast feeding and wheezing illness. The objective of this study was to investigate whether there is any association between breast feeding and wheezing in children aged over 5 years and to discover possible sources of heterogeneity. An electronic searc...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章,meta分析,评审
doi:10.1111/j.1365-3016.2011.01233.x
更新日期:2011-11-01 00:00:00
abstract::This study reports changes in the prevalence and outcome of Down's syndrome pregnancies within a 15-year period in a defined geographical population in the north of England. Cases of Down's syndrome in births and terminations of pregnancy occurring between 1985 and 1999, were identified from the Northern Congenital Ab...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1046/j.1365-3016.2003.00463.x
更新日期:2003-01-01 00:00:00
abstract::Several investigators have reported a 40% increase in the prevalence of twinning among women who have taken folic acid or multivitamins containing folic acid at the time of conception. Given that infant morbidity and mortality are greatly increased among twins, such a large increase in twinning could have serious impl...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1046/j.1365-3016.2003.00511.x
更新日期:2003-10-01 00:00:00
abstract::Gestational diabetes mellitus (GDM) is a risk factor for delivering a large-for-gestational-age (LGA) infant. Haemoglobin A1c (A1C) is an indicator of glycaemic control. The objective of this study was to test whether higher A1C quartile at the time of diagnosis of GDM is associated with increased risk of delivering a...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2012.01266.x
更新日期:2012-05-01 00:00:00
abstract::The population under study in the South African longitudinal study of urban children and their families, 'Birth to Ten' (BTT), comprised all births during a 7-week period from April to June 1990 in Soweto-Johannesburg. Specification of the population base for the cohort was hampered by a number of flaws in the notific...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.1995.tb00124.x
更新日期:1995-01-01 00:00:00
abstract::Recurrence risk provides information on the heterogeneity of risk in the population, and thus is useful for aetiological studies. While recurrence risk is observable in many areas of epidemiology, it is particularly accessible in the study of perinatal events. High recurrence rates of pregnancy problems suggest geneti...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2007.00830.x
更新日期:2007-07-01 00:00:00
abstract::Designing, piloting and proceeding with a longitudinal birth cohort is a major exercise. Here we outline ways in which a resource centre could be initiated to provide advice and training, a library of appropriate instruments and publications, provision for cross-cohort comparisons and a biobanking facility. The resour...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2009.01020.x
更新日期:2009-07-01 00:00:00
abstract:BACKGROUND:Nausea and vomiting during pregnancy (NVP) is the most common complication of pregnancy. NVP has been associated with improved fetal outcomes, but its association with childhood neurodevelopmental outcomes has rarely been studied. METHODS:Subjects were children aged 5-12 years (n = 560) who were controls in...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12151
更新日期:2014-11-01 00:00:00
abstract:BACKGROUND:Comparable evidence on adiposity inequalities in early life is lacking across a range of European countries. This study investigates whether low maternal education is associated with overweight and obesity risk in children from distinct European settings during early childhood. METHODS:Prospective data of 4...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12285
更新日期:2016-05-01 00:00:00
abstract::Whilst only about a third of all cerebral palsy occurs in children who had been of low birthweight, recent increases in the survival of low and very low birthweight infants have coincided with significant increases in the numbers of cerebral palsy children amongst them. This paper analyses data from the Western Austra...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.1992.tb00769.x
更新日期:1992-04-01 00:00:00
abstract::Studies based on data from the US have reported that the birthweight distribution at gestational age 28-31 weeks is bimodal with a second peak occurring at approximately 3300 g, suggesting that there is misclassification of term infants. In these studies, gestational ages were estimated from the date of the last menst...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2007.00863.x
更新日期:2007-09-01 00:00:00
abstract::In spite of technological progress throughout the world, ill health, both physical and mental, is widespread - but much of this is preventable. With rapid globalization, populations in both industrialised and developing countries are being exposed to various stresses and to new environmental factors, such as those rel...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2008.01009.x
更新日期:2009-07-01 00:00:00
abstract::Gender mix, especially the supposed hormone transfer in utero of the male fetus to his female co-twin, is a highly debated controversial subject. It occurs in animals (free-martin syndrome in the cow) but its existence in man has not been convincingly demonstrated. Two aspects of gender mix effects in man, birthweight...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2005.00613.x
更新日期:2005-01-01 00:00:00
abstract:BACKGROUND:A secular trend towards earlier puberty has been observed in girls, while a similar trend has been more uncertain in boys. We estimated current ages at pubertal development in both boys and girls. METHODS:In this population-based cohort study, 14 759 of 22 439 invited boys and girls born from 2000 to 2003 i...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12507
更新日期:2019-01-01 00:00:00
abstract::Evidence suggests that low concentrations of 25-hydroxyvitamin D(3) (25OHD3) during gestation may be associated with a range of adverse health outcomes in later life. Retrospective estimation of perinatal vitamin D status using questionnaires is extremely unreliable and stored serum samples are rarely available. We ai...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2010.01105.x
更新日期:2010-05-01 00:00:00
abstract:BACKGROUND:Large-for-gestational-age (LGA) or macrosomic infants are associated with adverse maternal and neonatal outcomes. It is unclear if these associations are stronger using customised birthweight centiles. We compared outcomes between term infants defined macrosomic by birthweight >4000 g (Macro(4000) ) or LGA b...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12002
更新日期:2012-11-01 00:00:00
abstract:BACKGROUND:Preterm delivery may affect the development of the upper airways resulting in a higher risk of obstructive sleep apnoea (OSA). We investigated whether children born at early term (37-38 6/7 weeks' gestation) are at an increased risk for childhood OSA as compared with those born later. METHODS:In this popula...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12342
更新日期:2017-03-01 00:00:00