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 in the Danish National Birth Cohort gave half-yearly self-reported information on puberty from the age of 11.5 years and throughout puberty. This late start of follow-up limits the estimation of age at onset of puberty but not later pubertal milestones. We estimated mean age at attaining the following pubertal milestones in years with 95% confidence intervals (CI): age at menarche, voice break, first ejaculation of semen and Tanner stages for pubic hair development and breast development or genital development. Further, the difference in mean age at menarche between mothers and daughters was estimated. RESULTS:In boys, voice break occurred at 13.1 (95% CI 13.0, 13.1) years, first ejaculation of semen occurred at 13.4 (95% CI 13.3, 13.4) years, and Tanner Genital Stage 5 occurred at 15.6 (95% CI 15.5, 15.6) years. In girls, age at menarche occurred at 13.0 (95% CI 13.0, 13.1) years and Tanner Breast Stage 5 occurred at 15.8 (95% CI 15.7, 15.9) years. Daughters had menarche 3.6 (95% CI 3.1, 4.2) months earlier than their mothers had. CONCLUSION:These data indicate that age at menarche has declined and to some extent support a decline in age at attaining other markers of pubertal development among boys.
journal_name
Paediatr Perinat Epidemioljournal_title
Paediatric and perinatal epidemiologyauthors
Brix N,Ernst A,Lauridsen LLB,Parner E,Støvring H,Olsen J,Henriksen TB,Ramlau-Hansen CHdoi
10.1111/ppe.12507subject
Has Abstractpub_date
2019-01-01 00:00:00pages
70-78issue
1eissn
0269-5022issn
1365-3016journal_volume
33pub_type
杂志文章abstract::This study investigated the effects of smoking and alcohol consumption in pregnancy on length, head circumference, upper arm circumference and ponderal index, of neonates born to 1513 Caucasian women who delivered at St George's Hospital, south London. All measurements were adjusted for gestational age, maternal heigh...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.1991.tb00687.x
更新日期:1991-01-01 00:00:00
abstract::In order to provide additional data and perspective to current clinical, policy, and legal debates surrounding the prenatal use of cocaine in the USA, a retrospective cohort study was conducted to examine effects of cocaine on selected perinatal outcomes, and to compare the relative risks of adverse perinatal outcomes...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章,多中心研究
doi:10.1111/j.1365-3016.1996.tb00050.x
更新日期:1996-07-01 00:00:00
abstract:BACKGROUND:Triptans are commonly prescribed for migraine, a pain condition that is highly prevalent in women of childbearing age. No prior studies have investigated associations between exposure to triptans during fetal life and risk of externalising and internalising behaviours in children. METHODS:This study was set...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12253
更新日期:2016-03-01 00:00:00
abstract::The aims of the study were to describe the trend in birthweight from 1985 to 2000 in Chile and ascertain the possible factors that may explain the changes in birthweight during the period. We used time series of birthweight and length at birth of all live births (n > 4,000,000). Multivariable regression analyses were ...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2005.00673.x
更新日期:2005-11-01 00:00:00
abstract::The aim of this cross disciplinary study was to identify the most significant variables related to childhood accidental poisoning. The study was carried out on a representative sample of families living in the Greater Athens Area comprising 1245 children aged up to 5 years. Data were collected by a team of researchers...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.1994.tb00437.x
更新日期:1994-01-01 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::A population-based study was conducted using maternally-linked birth certificate records from Washington State for 1980-93 to evaluate the risk of birth defect occurrence among infants with previously affected siblings, relative to infants whose siblings did not have birth defects. The risks of recurrence of similar a...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1046/j.1365-3016.11.s1.3.x
更新日期:1997-01-01 00:00:00
abstract::A prospective study of 4934 babies of different ethnic groups has confirmed the high perinatal mortality rate for Pakistanis and has shown that this was not due to a reluctance to terminate a fetus who is known to be seriously malformed. The major cause of early mortality was a high rate of lethal malformations, which...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.1991.tb00689.x
更新日期:1991-01-01 00:00:00
abstract::Child sexual abuse research presents practical, methodological and statistical challenges. This paper examines some recent literature about the incidence and effects of child sexual abuse. Researchers who use epidemiological studies to attempt to ascertain the prevalence of different forms of abuse should be aware of ...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章,评审
doi:10.1111/j.1365-3016.1990.tb00657.x
更新日期:1990-07-01 00:00:00
abstract::The present state of epidemiological research in relation to mental retardation is described, with particular respect to taxonomic issues. A comprehensive taxonomy is proposed, and the problems of establishing it discussed. ...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.1992.tb00759.x
更新日期:1992-04-01 00:00:00
abstract:BACKGROUND:To investigate whether the adverse infant health outcomes associated with early birth and severe neonatal morbidity (SNM) persist beyond the first year of life and impact on paediatric hospitalisations for children up to 6 years of age. METHODS:The study population included all singleton live births, >32 we...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12188
更新日期:2015-05-01 00:00:00
abstract::There has been a trend over the past two decades in some Western countries for women to delay childbearing, a factor associated with an increased risk of perinatal mortality (stillbirth and neonatal death). While the rates of stillbirth and neonatal mortality have improved in some countries, it has not been establishe...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2007.00849.x
更新日期:2007-11-01 00:00:00
abstract:BACKGROUND:Outcomes of neonates with congenital diaphragmatic hernia (CDH) are variable; reports are frequently limited to the experience of single tertiary care centres-a possible source of bias. Population-based studies decrease survivor bias and provide additional insight into this high-mortality condition. The obje...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12289
更新日期:2016-07-01 00:00:00
abstract::Clarke et al. suggested that women who have had a spontaneous abortion are at an increased risk in their next pregnancy of producing an offspring with a neural tube defect (NTD). A matched case-control study was carried out to test the related hypothesis that a spontaneous abortion occurring in the 6-month period prio...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.1993.tb00391.x
更新日期:1993-04-01 00:00:00
abstract:BACKGROUND:To investigate the association between maternal country of birth and father's origin and unplanned and planned caesarean birth in Sweden. METHODS:Population-based register study including all singleton births in Sweden between 1999 and 2012 (n = 1 311 885). Multinomial regression was conducted to estimate o...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12399
更新日期:2017-11-01 00:00:00
abstract::There is adequate evidence that growth during the perinatal period is linked to the risk of several adult onset diseases, and recent findings indicate that the insulin-like growth factor (IGF) system is involved in prenatal growth, as reflected in birthweight. However, whether major components of the IGF system are in...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1046/j.1365-3016.2003.00494.x
更新日期:2003-07-01 00:00:00
abstract::In this study we have examined the early life predictors of smoking at age 14 in a birth cohort of individuals born in Brisbane, Australia between 1981 and 1984. In stratified and multivariable analyses maternal smoking throughout pregnancy and when the child was aged 14 were both associated with the child smoking: fu...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2005.00674.x
更新日期:2005-09-01 00:00:00
abstract::We aimed to determine the relationship of douching prior to pregnancy and bacterial vaginosis (BV) during pregnancy on preterm birth, addressing individual and joint effects. We used a prospective cohort study and assessed vaginal microflora using gram stains and Nugent's criteria. Douching behaviour was based on self...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2008.00970.x
更新日期:2008-11-01 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::During a scheduled visit to the school physician, the number of children with a history of febrile seizures was determined in 3570 children attending primary schools in the suburban area of the city of Rotterdam. At the age of 6 years, 140 had experienced at least one febrile seizure (3.9%, 95% confidence interval 3.3...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.1991.tb00699.x
更新日期:1991-04-01 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::The nutritional status of a woman before and during pregnancy is important for a healthy pregnancy outcome. Maternal malnutrition is a key contributor to poor fetal growth, low birthweight (LBW) and short- and long-term infant morbidity and mortality. This review summarised the evidence on association of maternal nutr...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章,评审
doi:10.1111/j.1365-3016.2012.01308.x
更新日期:2012-07-01 00:00:00
abstract:BACKGROUND:Studies on a limited scale in urban settings of Bangladesh report stillbirth rates that do not specifically provide information on the situation of underprivileged slum populations. This study aims to estimate the prevalence of, and risk factors associated with, stillbirth in a developing population. METHOD...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12026
更新日期:2013-03-01 00:00:00
abstract::The perinatal mortality rate (PMR) in twins was analysed using Japanese vital statistics during the period 1980-98. There was a total of 1992 twin perinatal deaths. The PMR in twins significantly decreased from 91 per 1000 births in 1980 to 31 per 1000 in 1998. The PMR was higher in males than females, but the differe...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1046/j.1365-3016.2001.00361.x
更新日期:2001-07-01 00:00:00
abstract::Necrotising enterocolitis is the most common gastrointestinal complication of pre-term infants. In order to determine the strength of the association of hypoxia/ischaemia and infection as causative factors in necrotising enterocolitis, we evaluated all liveborn pre-term infants with a birthweight less than 1500 g and/...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章,评审
doi:10.1111/j.1365-3016.1989.tb00369.x
更新日期:1989-01-01 00:00:00
abstract::Group B streptococcal (GBS) infection is still an important cause of morbidity and mortality in newborn infants. In The Netherlands, there are no published data on the incidence of neonatal GBS infection. We collected data of all infants with GBS disease during the first 3 months of life, as reported to the Dutch Paed...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1046/j.1365-3016.2002.00437.x
更新日期:2002-10-01 00:00:00
abstract::The fetal growth curve and neonatal mortality rate, based on gestational age and birthweight, are important for identifying groups of high-risk neonates and developing appropriate medical services and health-care programmes. The purpose of this study was to develop a national fetal growth curve for neonates in Korea, ...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/j.1365-3016.2007.00850.x
更新日期:2007-09-01 00:00:00
abstract:BACKGROUND:This study examined potential self-selection bias in a large pregnancy cohort by comparing exposure-outcome associations from the cohort to similar associations obtained from nationwide registry data. The outcome under study was specialist-confirmed diagnosis of autism spectrum disorders (ASDs). METHODS:The...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12077
更新日期:2013-11-01 00:00:00
abstract:BACKGROUND:Self-reported weight prior to pregnancy is prone to error. We utilised a measured pre-conceptional weight from the electronic health record (EHR) to investigate error in recalled pre-pregnancy body mass index (BMI) category and compared how associations between pre-pregnancy BMI and pregnancy outcomes varied...
journal_title:Paediatric and perinatal epidemiology
pub_type: 杂志文章
doi:10.1111/ppe.12286
更新日期:2016-07-01 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