Abstract:
OBJECTIVE:To estimate the association between maternal age and fetal death (spontaneous abortion, ectopic pregnancy, stillbirth), taking into account a woman's reproductive history. DESIGN:Prospective register linkage study. SUBJECTS:All women with a reproductive outcome (live birth, stillbirth, spontaneous abortion leading to admission to hospital, induced abortion, ectopic pregnancy, or hydatidiform mole) in Denmark from 1978 to 1992; a total of 634 272 women and 1 221 546 pregnancy outcomes. MAIN OUTCOME MEASURES:Age related risk of fetal loss, ectopic pregnancy, and stillbirth, and age related risk of spontaneous abortion stratified according to parity and previous spontaneous abortions. RESULTS:Overall, 13.5% of the pregnancies intended to be carried to term ended with fetal loss. At age 42 years, more than half of such pregnancies resulted in fetal loss. The risk of a spontaneous abortion was 8.9% in women aged 20-24 years and 74.7% in those aged 45 years or more. High maternal age was a significant risk factor for spontaneous abortion irrespective of the number of previous miscarriages, parity, or calendar period. The risk of an ectopic pregnancy and stillbirth also increased with increasing maternal age. CONCLUSIONS:Fetal loss is high in women in their late 30s or older, irrespective of reproductive history. This should be taken into consideration in pregnancy planning and counselling.
journal_name
BMJjournal_title
BMJ (Clinical research ed.)authors
Nybo Andersen AM,Wohlfahrt J,Christens P,Olsen J,Melbye Mdoi
10.1136/bmj.320.7251.1708keywords:
subject
Has Abstractpub_date
2000-06-24 00:00:00pages
1708-12issue
7251eissn
0959-8138issn
1756-1833journal_volume
320pub_type
杂志文章abstract:OBJECTIVE:To study changes from 1969 to 1983 in the prognosis of patients with acute myocardial infarction treated in a coronary care unit. DESIGN:Mortality follow up of all patients with definite acute myocardial infarction. SETTING:The coronary care unit of the Royal Melbourne Hospital, a tertiary referral centre. ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.299.6704.892
更新日期:1989-10-07 00:00:00
abstract:OBJECTIVE:To confirm the findings of pilot studies that interferon alfa is an effective treatment of Europid men with chronic hepatitis B virus infection. DESIGN:Randomised controlled trial of three months treatment with interferon alfa followed by 12 months of observation. SETTING:Outpatient clinic of a tertiary ref...
journal_title:BMJ (Clinical research ed.)
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1136/bmj.299.6700.652
更新日期:1989-09-09 00:00:00
abstract:OBJECTIVES:To investigate the association between four sociodemographic measures (unemployment, overcrowding, low social class, and the proportion of migrants from areas of high prevalence of tuberculosis) and average level and rate of change of notification rates for tuberculosis. DESIGN:Ecological analysis of both t...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.310.6985.963
更新日期:1995-04-15 00:00:00
abstract:OBJECTIVE:To describe the association between epithelial cell IgM, which has previously been associated with an increased incidence of loss of renal graft in children, with a novel cutaneous eruption and unexplained native renal disease. DESIGN:Observational study on children with epithelial cell antibody presenting w...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.303.6795.161
更新日期:1991-07-20 00:00:00
abstract:OBJECTIVES:To identify the genetic determinants of fracture risk and assess the role of 15 clinical risk factors on osteoporotic fracture risk. DESIGN:Meta-analysis of genome wide association studies (GWAS) and a two-sample mendelian randomisation approach. SETTING:25 cohorts from Europe, United States, east Asia, an...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,meta分析
doi:10.1136/bmj.k3225
更新日期:2018-08-29 00:00:00
abstract:OBJECTIVE:To examine the impact of antenatal supplementation with multiple micronutrients or iron and folic acid compared with folic acid alone on birth weight, duration of gestation, and maternal haemoglobin concentration in the third trimester. DESIGN:Cluster randomised double blind controlled trial. SETTING:Two ru...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1136/bmj.a2001
更新日期:2008-11-07 00:00:00
abstract:OBJECTIVE:To examine the associations of a vegetarian diet and dietary fibre intake with risk of diverticular disease. DESIGN:Prospective cohort study. SETTING:The EPIC-Oxford study, a cohort of mainly health conscious participants recruited from around the United Kingdom. PARTICIPANTS:47,033 men and women living in...
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pub_type: 杂志文章
doi:10.1136/bmj.d4131
更新日期:2011-07-19 00:00:00
abstract:OBJECTIVE:To determine the global capacity (availability, accessibility, quality, and affordability) to deliver kidney replacement therapy (dialysis and transplantation) and conservative kidney management. DESIGN:International cross sectional survey. SETTING:International Society of Nephrology (ISN) survey of 182 cou...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.l5873
更新日期:2019-10-31 00:00:00
abstract:OBJECTIVE:To examine the predictors of long term outcome for patients with the chronic fatigue syndrome. DESIGN:Cohort study. SUBJECTS:139 subjects previously enrolled in two treatment trials; 103 (74%) were reassessed a mean of 3.2 years after start of the trials. SETTING:University hospital referral centre. MAIN ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.308.6931.756
更新日期:1994-03-19 00:00:00
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journal_title:BMJ (Clinical research ed.)
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1136/bmj.299.6709.1202
更新日期:1989-11-11 00:00:00
abstract:OBJECTIVES:To investigate whether the use of graduated compression stockings (GCS) offers any adjuvant benefit when pharmaco-thromboprophylaxis is used for venous thromboembolism prophylaxis in patients undergoing elective surgery. DESIGN:Open, multicentre, randomised, controlled, non-inferiority trial. SETTING:Seven...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1136/bmj.m1309
更新日期:2020-05-13 00:00:00
abstract::There is currently much debate about how to improve undergraduate medical education, and in particular on how best to prepare students for clinical responsibility. For 20 years a period of trainee internship has formed part of New Zealand medical students' undergraduate training, and the model could have much to offer...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.308.6925.398
更新日期:1994-02-05 00:00:00
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pub_type: 杂志文章
doi:10.1136/bmj.327.7413.480
更新日期:2003-08-30 00:00:00
abstract:OBJECTIVES:To determine the relation between the HIV/AIDS epidemic and support for dependent elderly people in Africa. DESIGN:Retrospective analysis using data from Demographic and Health Surveys. SETTING:22 African countries between 1991 and 2006. PARTICIPANTS:123,176 individuals over the age of 60. MAIN OUTCOME M...
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pub_type: 杂志文章
doi:10.1136/bmj.c2841
更新日期:2010-06-16 00:00:00
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journal_title:BMJ (Clinical research ed.)
pub_type: 临床试验,杂志文章
doi:10.1136/bmj.298.6686.1483
更新日期:1989-06-03 00:00:00
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journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.313.7050.158
更新日期:1996-07-20 00:00:00
abstract::The disease management approach to patient care seeks to coordinate resources across the healthcare delivery system. The growing interest in evidence based medicine and outcomes, and a commitment to integrated care across the primary, secondary, and community care sectors, all contribute to making disease management a...
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pub_type: 杂志文章
doi:10.1136/bmj.315.7099.50
更新日期:1997-07-05 00:00:00
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journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.308.6943.1541
更新日期:1994-06-11 00:00:00
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journal_title:BMJ (Clinical research ed.)
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1994-03-05 00:00:00
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pub_type: 杂志文章
doi:10.1136/bmj.h517
更新日期:2015-02-18 00:00:00
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pub_type: 杂志文章
doi:10.1136/bmj.m4104
更新日期:2020-11-25 00:00:00
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pub_type: 社论
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pub_type: 杂志文章
doi:10.1136/bmj.303.6803.605
更新日期:1991-09-14 00:00:00
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journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,meta分析
doi:10.1136/bmj.l6202
更新日期:2019-12-18 00:00:00
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journal_title:BMJ (Clinical research ed.)
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1136/bmj.322.7283.400
更新日期:2001-02-17 00:00:00
abstract:OBJECTIVE:To discover whether the wartime government evacuation of children from London and other population centres to rural districts was associated with any increase in childhood leukaemia. DESIGN:Observational study of mortality from leukaemia among the childhood population of England and Wales in relation to the ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.309.6963.1197
更新日期:1994-11-05 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2014-08-26 00:00:00
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journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,meta分析,多中心研究
doi:10.1136/bmj.f880
更新日期:2013-03-18 00:00:00
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doi:10.1136/bmj.c4092
更新日期:2010-08-11 00:00:00
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journal_title:BMJ (Clinical research ed.)
pub_type: 评论,杂志文章
doi:10.1136/bmj.i2002
更新日期:2016-05-10 00:00:00