Abstract:
OBJECTIVE:To investigate the association between elective caesarean sections and neonatal respiratory morbidity and the importance of timing of elective caesarean sections. DESIGN:Cohort study with prospectively collected data from the Aarhus birth cohort, Denmark. SETTING:Obstetric department and neonatal department of a university hospital in Denmark. PARTICIPANTS:All liveborn babies without malformations, with gestational ages between 37 and 41 weeks, and delivered between 1 January 1998 and 31 December 2006 (34 458 babies). MAIN OUTCOME MEASURES:Respiratory morbidity (transitory tachypnoea of the newborn, respiratory distress syndrome, persistent pulmonary hypertension of the newborn) and serious respiratory morbidity (oxygen therapy for more than two days, nasal continuous positive airway pressure, or need for mechanical ventilation). RESULTS:2687 infants were delivered by elective caesarean section. Compared with newborns intended for vaginal delivery, an increased risk of respiratory morbidity was found for infants delivered by elective caesarean section at 37 weeks' gestation (odds ratio 3.9, 95% confidence interval 2.4 to 6.5), 38 weeks' gestation (3.0, 2.1 to 4.3), and 39 weeks' gestation (1.9, 1.2 to 3.0). The increased risks of serious respiratory morbidity showed the same pattern but with higher odds ratios: a fivefold increase was found at 37 weeks (5.0, 1.6 to16.0). These results remained essentially unchanged after exclusion of pregnancies complicated by diabetes, pre-eclampsia, and intrauterine growth retardation, or by breech presentation. CONCLUSION:Compared with newborns delivered vaginally or by emergency caesarean sections, those delivered by elective caesarean section around term have an increased risk of overall and serious respiratory morbidity. The relative risk increased with decreasing gestational age.
journal_name
BMJjournal_title
BMJ (Clinical research ed.)authors
Hansen AK,Wisborg K,Uldbjerg N,Henriksen TBdoi
10.1136/bmj.39405.539282.BEsubject
Has Abstractpub_date
2008-01-12 00:00:00pages
85-7issue
7635eissn
0959-8138issn
1756-1833pii
bmj.39405.539282.BEjournal_volume
336pub_type
杂志文章abstract:OBJECTIVE:To assess whether occupational exposure among commercial airline cabin attendants are associated with risk of cancer. DESIGN:Record linkage study. SETTING:Finland. SUBJECTS-1577 female and 187 male cabin attendants who had worked for the Finnish airline companies. MAIN OUTCOME MEASURE:Standardised incidenc...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.311.7006.649
更新日期:1995-09-09 00:00:00
abstract::The meaning of the GP contract has changed since the last major upheaval in the mid-1960s. The government has always dealt with general practitioners as independent contractors, but the way in which it treated them in 1990 was entirely different from the way in which they were treated in 1966. In 1966, the profession'...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.314.7084.895
更新日期:1997-03-22 00:00:00
abstract:OBJECTIVE:To study the association between wheezy symptoms in young children and the presence of bacteria in the airways. DESIGN:Birth cohort study. SETTING:Clinical research unit in Copenhagen. PARTICIPANTS:Children of asthmatic mothers, from age 4 weeks to 3 years, with planned visits and acute admissions to the r...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.c4978
更新日期:2010-10-04 00:00:00
abstract:OBJECTIVE:To compare whether differences exist between alternating pressure overlays and alternating pressure mattresses in the development of new pressure ulcers, healing of existing pressure ulcers, and patient acceptability. DESIGN:Pragmatic, open, multicentre, randomised controlled trial. SETTING:11 hospitals in ...
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.38849.478299.7C
更新日期:2006-06-17 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::Managed care has entered the lexicon of healthcare reform, but confusion and ignorance surround its meaning and purpose. It seeks to cut the costs of health care while maintaining its quality, but the evidence that it is able to achieve these aims is mixed. As well as raising awareness and understanding of the issues ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,评审
doi:10.1136/bmj.314.7097.1823
更新日期:1997-06-21 00:00:00
abstract:OBJECTIVES:To provide a contemporary account of the treatment and outcomes of acute coronary attacks in England and Wales and to identify strategies that might improve the outcome. DESIGN:Two year community and hospital based study in three British health districts. SETTING:Health districts of Brighton (population 28...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究
doi:
更新日期:1998-04-04 00:00:00
abstract:OBJECTIVE:To determine the prevalence of HIV among pregnant women, in particular those whose behaviour or that of their partners put them at "low risk" of infection. DESIGN:Voluntary named or anonymous HIV testing of pregnant women during 21 months (November 1988 to July 1990). SUBJECTS AND SETTING:All women who plan...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.304.6834.1082
更新日期:1992-04-25 00:00:00
abstract:OBJECTIVES:To examine the incidence of suicides due to co-proxamol compared with tricyclic antidepressants and paracetamol, and to compare fatality rates for self poisonings with these drugs. DESIGN:Analysis of routinely collected national and local data on suicides and self poisonings. SETTING:Records of suicides in...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.326.7397.1006
更新日期:2003-05-10 00:00:00
abstract:OBJECTIVE:To study delays between sending referral letters and the outpatient appointment and to assess the content of referral and reply letters, their educational value, and the extent to which questions asked are answered by reply letters. DESIGN:Retrospective review of referrals to 16 consultant orthopaedic surgeo...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.301.6750.470
更新日期:1990-09-08 00:00:00
abstract:OBJECTIVES:To examine the association between environmental exposure to takeaway food outlets, takeaway food consumption, and body weight, while accounting for home, work place, and commuting route environments. DESIGN:Population based, cross sectional study, using data on individual participants' diet and weight, and...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.g1464
更新日期:2014-03-13 00:00:00
abstract:OBJECTIVE:To assess long term survival (> 5 years) and quality of life in severely ill patients referred for urgent cardiac transplantation. SETTING:Tertiary referral centres: before transplantation at the National Heart Hospital (late 1984 to end 1986); after transplantation at Harefield Hospital. SUBJECTS:Eighteen ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.306.6870.98
更新日期:1993-01-09 00:00:00
abstract:OBJECTIVE:To determine the incidence of cervical cancer after several negative cervical smear tests at different ages. DESIGN:Prospective observational study of incidence of cervical cancer after the third consecutive negative result based on individual level data in a national registry of histopathology and cytopatho...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究
doi:10.1136/bmj.b1354
更新日期:2009-04-24 00:00:00
abstract:OBJECTIVE:To assess the impact on birth size and risk of low birth weight of alternative combinations of micronutrients given to pregnant women. DESIGN:Double blind cluster randomised controlled trial. SETTING:Rural community in south eastern Nepal. PARTICIPANTS:4926 pregnant women and 4130 live born infants. INTER...
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.326.7389.571
更新日期:2003-03-15 00:00:00
abstract::Stroke is the leading cause of long term disability in developed countries and one of the top causes of mortality worldwide. The past decade has seen substantial advances in the diagnostic and treatment options available to minimize the impact of acute ischemic stroke. The key first step in stroke care is early identi...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,评审
doi:10.1136/bmj.l6983
更新日期:2020-02-13 00:00:00
abstract::An increase in the incidence of cardiovascular disease has generally been observed in postmenopausal women, but there have been few studies of the association between menopausal state and atherosclerosis. In this study 294 premenopausal and 319 postmenopausal women aged 45 to 55 were examined radiographically for calc...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.298.6674.642
更新日期:1989-03-11 00:00:00
abstract:OBJECTIVES:To estimate the cost effectiveness of statins in lowering serum cholesterol concentration in people at varying risk of fatal cardiovascular disease and to explore the implications of changing the criteria for intervention on cost and cost effectiveness for a purchasing authority. DESIGN:A life table method ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.312.7044.1443
更新日期:1996-06-08 00:00:00
abstract:OBJECTIVE:To assess the risk of adverse perinatal events of vaccination of pregnant women with an MF59 adjuvanted vaccine. DESIGN:Cross sectional multicentre study. SETTING:49 public hospitals in major cities in Argentina, from September 2010 to May 2011. PARTICIPANTS:30,448 mothers (7293 vaccinated) and their 30,76...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究
doi:10.1136/bmj.f393
更新日期:2013-02-04 00:00:00
abstract:OBJECTIVE:To examine the associations between neuraxial anaesthesia or general anaesthesia and clinical outcomes, length of hospital stay, and readmission in adults undergoing lower limb revascularisation surgery. DESIGN:Comparative effectiveness study using linked, validated, population based databases. SETTING:Onta...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.m4104
更新日期:2020-11-25 00:00:00
abstract:OBJECTIVES:To investigate patients' and family members' perceptions and experiences of disclosure of healthcare incidents and to derive principles of effective disclosure. DESIGN:Retrospective qualitative study based on 100 semi-structured, in depth interviews with patients and family members. SETTING:Nationwide mult...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究
doi:10.1136/bmj.d4423
更新日期:2011-07-25 00:00:00
abstract:OBJECTIVE:To estimate the costs of diagnosis and treatment of diabetes in Tanzania. DESIGN:Costs estimated from the reported and recorded experience of patients with newly presenting diabetes in 1989-90 and of diabetic patients first seen in 1981-2. SETTING:Muhimbili Medical Centre, Dar es Salaam. SUBJECTS:464 patie...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.304.6836.1215
更新日期:1992-05-09 00:00:00
abstract:OBJECTIVE:To evaluate participants' perceptions of the impact on them of an additional six months' training beyond the standard 12 month general practice vocational training scheme. DESIGN:Qualitative study using focus groups. SETTING:General practice vocational training in Northern Ireland. PARTICIPANTS:13 general ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.327.7421.971
更新日期:2003-10-25 00:00:00
abstract:OBJECTIVE:Firstly, to assess the completeness of ascertainment in the National Congenital Anomaly System (NCAS), the basis for congenital anomaly surveillance in England and Wales, and its variation by defect, geographical area, and socioeconomic deprivation. Secondly, to assess the impact of the lack of data on pregna...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.38300.665301.3A
更新日期:2005-01-01 00:00:00
abstract:OBJECTIVE:To compare perinatal outcomes in births of women with versus without a history of bariatric surgery. DESIGN:Population based matched cohort study. SETTING:Swedish national health service. PARTICIPANTS:1,742,702 singleton births identified in the Swedish medical birth register between 1992 and 2009. For eac...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.f6460
更新日期:2013-11-12 00:00:00
abstract:OBJECTIVE:To identify the attitudes of general practitioners towards the use of thermometers in general practice. DESIGN:Postal questionnaire survey. SETTING:All general practitioners in the catchment area of Frimley Park Hospital, Surrey. SUBJECTS:145 general practitioners. MAIN OUTCOME MEASURES:Answers to questio...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.304.6832.961
更新日期:1992-04-11 00:00:00
abstract::For the past 18 years there has been a proliferation of European committees, boards, associations, colleges, and working groups set up to promote the harmonisation of specialist training in Europe. It has been taken as read that this objective is desirable. The fact that these bodies have achieved remarkably little is...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.311.7000.297
更新日期:1995-07-29 00:00:00
abstract::The opportunities for international public health collaboration through joint business ventures between the USSR and Western nations, an arrangement that would benefit the public, industry, and the medical community, are discussed. Evidence indicates that the state of health of the Soviet population is declining rapi...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.302.6777.633
更新日期:1991-03-16 00:00:00
abstract::Recent changes in the Russian government introduced by Boris Yeltsin include the appointment of Eduard Nechaev as health minister at the beginning of this year. The appointment received little publicity in the West, although his predecessor was sacked after only one year for failing to make any effort to improve healt...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.306.6882.909
更新日期:1993-04-03 00:00:00
abstract:OBJECTIVES:To compare the effectiveness of an early switch to oral antibiotics with the standard 7 day course of intravenous antibiotics in severe community acquired pneumonia. DESIGN:Multicentre randomised controlled trial. SETTING:Five teaching hospitals and 2 university medical centres in the Netherlands. PARTICI...
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.38993.560984.BE
更新日期:2006-12-09 00:00:00
abstract:PROBLEM:Deep infection after joint arthroplasty can be catastrophic, leading to further surgery, loss of the prosthesis, disability, and risk of mortality. Twenty nine new cases of methicillin resistant Staphylococcus aureus occurred in the first year after elective orthopaedic surgery was centralised to a district gen...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.329.7458.149
更新日期:2004-07-17 00:00:00