Abstract:
OBJECTIVE:To investigate the relations of maternal diet and smoking during pregnancy to placental and birth weights at term. DESIGN:Prospective cohort study. SETTING:District general hospital in the south of England. PARTICIPANTS:693 pregnant nulliparous white women with singleton pregnancies who were selected from antenatal booking clinics with stratified random sampling. MAIN OUTCOME MEASURES:Birth and placental weights at term. RESULTS:Placental and birth weights were unrelated to the intake of any macronutrient. Early in pregnancy, vitamin C was the only micronutrient independently associated with birth weight after adjustment for maternal height and smoking. Each ln mg increase in vitamin C was associated with a 50.8 g (95% confidence interval 4.6 g to 97.0 g) increase in birth weight. Vitamin C, vitamin E, and folate were each associated with placental weight after adjustment for maternal characteristics. In simultaneous regression, however, vitamin C was the only nutrient predictive of placental weight: each ln mg increase in vitamin C was associated with a 3.2% (0.4 to 6.1) rise in placental weight. No nutrient late in pregnancy was associated with either placental or birth weight. CONCLUSIONS:Concern over the impact of maternal nutrition on the health of the infant has been premature. Maternal nutrition, at least in industrialised populations, seems to have only a small effect on placental and birth weights. Other possible determinants of fetal and placental growth should be investigated.
journal_name
BMJjournal_title
BMJ (Clinical research ed.)authors
Mathews F,Yudkin P,Neil Adoi
10.1136/bmj.319.7206.339keywords:
subject
Has Abstractpub_date
1999-08-07 00:00:00pages
339-43issue
7206eissn
0959-8138issn
1756-1833journal_volume
319pub_type
杂志文章abstract:OBJECTIVE:To identify major concerns of national and local importance in the provision, commissioning, research, and use of generalist end of life care. DESIGN:A national consultation and prioritising exercise using a modified form of the nominal group technique. PARTICIPANTS:Healthcare practitioners, commissioners, ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究
doi:10.1136/bmj.a1720
更新日期:2008-10-01 00:00:00
abstract:OBJECTIVE:To investigate the association between treatment induced change in high density lipoprotein cholesterol and total death, coronary heart disease death, and coronary heart disease events (coronary heart disease death and non-fatal myocardial infarction) adjusted for changes in low density lipoprotein cholestero...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,meta分析,评审
doi:10.1136/bmj.b92
更新日期:2009-02-16 00:00:00
abstract::The UN has reported that five multinational pharmaceutical companies would cut down HIV drug prices in the developing world. One of these drug companies is GlaxoWellcome, which has promised to reduce the price of zidovudine and lamivudine to US$2 in the poorest nations, a fifth of its price in the US. Although Peter ...
journal_title:BMJ (Clinical research ed.)
pub_type: 新闻
doi:10.1136/bmj.320.7246.1357
更新日期:2000-05-20 00:00:00
abstract:OBJECTIVE:To study the comparative importance of environment and genes in the development of islet cell autoimmunity associated with insulin dependent diabetes mellitus. DESIGN:Population based study of diabetic twins. SETTING:Danish population. SUBJECTS:18 monozygotic and 36 dizygotic twin pairs with one or both pa...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.314.7094.1575
更新日期:1997-05-31 00:00:00
abstract::In a series of papers published during the past decade Richard Wilkinson has advanced the view that income inequality is the key determinant of variations in average life expectancy at birth among developed countries. Yet a careful examination of the two sources of data on income distribution most often used by Wilkin...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.311.7015.1282
更新日期:1995-11-11 00:00:00
abstract:OBJECTIVE:To investigate the relation between total fat intake and body weight in adults and children. DESIGN:Systematic review and meta-analysis of randomised controlled trials and cohort studies. DATA SOURCES:Medline, Embase, CINAHL, and the Cochrane Central Register of Controlled Trials to June 2010. INCLUSION CR...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,meta分析,评审
doi:10.1136/bmj.e7666
更新日期:2012-12-06 00:00:00
abstract:OBJECTIVES:To compare patterns of admission to hospital and prognosis in white and South Asian patients newly admitted with heart failure, and to evaluate the effect of personal characteristics and comorbidity on outcome. DESIGN:Historical cohort study. SETTING:UK district health authority (population 960,000). PART...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.327.7414.526
更新日期:2003-09-06 00:00:00
abstract::Lifetime fertility, abortion rates, and the proportion of pregnancies resulting in induced abortion were investigated in 105 district health authorities in England. In 1995, a total of 147,851 abortions occurred among women living in England, compared with 613,257 live births; a ratio of 1:4. This was equivalent to ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.316.7146.1711
更新日期:1998-06-06 00:00:00
abstract:OBJECTIVE:To evaluate the effectiveness of a monovalent rotavirus vaccine against severe rotavirus disease and to assess its impact on diarrhoea in children aged less than 2 years after national introduction in El Salvador, a low-middle income country in Central America. DESIGN:Matched case-control study. SETTING:Sev...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究
doi:10.1136/bmj.c2825
更新日期:2010-06-15 00:00:00
abstract:OBJECTIVE:To study the relation between low walking speed and the risk of death in older people, both overall and with regard to the main causes of death. DESIGN:Prospective cohort study. SETTING:Dijon centre (France) of the Three-City study. PARTICIPANTS:3208 men and women aged >or=65 living in the community, recru...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究
doi:10.1136/bmj.b4460
更新日期:2009-11-10 00:00:00
abstract:OBJECTIVE:To examine period trends in the rate of suicide in the first 28 days after discharge from psychiatric hospital. DESIGN:Cohort study of patients discharged from psychiatric hospital. SETTING:Scotland. SUBJECTS:All patients aged 15-84 who were discharged from Scottish psychiatric hospitals during 1968 to 199...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.311.7001.357
更新日期:1995-08-05 00:00:00
abstract:OBJECTIVE:To study the association between number of cups of coffee consumed per day and coronary death when taking other major coronary risk factors into account. DESIGN:Men and women attending screening and followed up for a mean of 6.4 years. SETTING:Cardiovascular survey performed by ambulatory teams from the Nat...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.300.6724.566
更新日期:1990-03-03 00:00:00
abstract:OBJECTIVE:To determine patient, institution, and machine characteristics that contribute to variation in radiation doses used for computed tomography (CT). DESIGN:Prospective cohort study. SETTING:Data were assembled and analyzed from the University of California San Francisco CT International Dose Registry. PARTICI...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究
doi:10.1136/bmj.k4931
更新日期:2019-01-02 00:00:00
abstract:OBJECTIVE:To examine the association between obstetric epidural anaesthesia and subsequent long term problems. DESIGN:Postal questionnaire on health problems after childbirth linked to maternity case note data. SETTING:Maternity hospital in Birmingham. SUBJECTS:11701 women who delivered their most recent child durin...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.304.6837.1279
更新日期:1992-05-16 00:00:00
abstract::A brief note on the status of the AIDS pandemic, from the Amsterdam VIIIth International Conference on AIDS, warns that the course of the epidemic is not being altered by prevention efforts. AIDS occurs in every country, usually spread by heterosexual contact, so that women are equally affected with men. WHO estimat...
journal_title:BMJ (Clinical research ed.)
pub_type: 新闻
doi:10.1136/bmj.305.6847.209
更新日期:1992-07-25 00:00:00
abstract:OBJECTIVE:To estimate the high risk group for cardiovascular disease in a well defined Norwegian population according to European guidelines and the systematic coronary risk evaluation system. DESIGN:Modelling study. SETTING:Nord-Tröndelag health study 1995-7 (HUNT 2), Norway. PARTICIPANTS:5548 participants of the N...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.38555.648623.8F
更新日期:2005-09-10 00:00:00
abstract:OBJECTIVE:To investigate the effect of overweight on premature mortality and work disability in young and middle aged Finns. DESIGN:Prospective cohort study based on data collected in the multiphasic health examinations by the Social Insurance Institution of Finland from 1966 to 1972 and follow up until 1982. SETTING...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.301.6756.835
更新日期:1990-10-13 00:00:00
abstract:OBJECTIVE:To determine whether rates of suicide changed in Toronto after a barrier was erected at Bloor Street Viaduct, the bridge with the world's second highest annual rate of suicide by jumping after Golden Gate Bridge in San Francisco. DESIGN:Natural experiment. SETTING:City of Toronto and province of Ontario, Ca...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.c2884
更新日期:2010-07-06 00:00:00
abstract::The recent growth in the numbers of published systematic reviews reflects growing recognition of their importance for improving knowledge about the effects of health care. In Britain the NHS R&D Programme has established two centres to prepare systematic reviews of existing information, and the Cochrane Collaboration-...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,评审
doi:10.1136/bmj.309.6958.862
更新日期:1994-10-01 00:00:00
abstract:OBJECTIVES:To determine the association between ambulance response time and survival from out of hospital cardiopulmonary arrest and to estimate the effect of reducing response times. DESIGN:Cohort study. SETTING:Scottish Ambulance Service. SUBJECTS:All out of hospital cardiopulmonary arrests due to cardiac disease ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.322.7299.1385
更新日期:2001-06-09 00:00:00
abstract:OBJECTIVE:To describe the current methods used by English medical schools to identify prospective medical students for admission to the five year degree course. DESIGN:Review study including documentary analysis and interviews with admissions tutors. SETTING:All schools (n = 22) participating in the national expansio...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究
doi:10.1136/bmj.38768.590174.55
更新日期:2006-04-29 00:00:00
abstract:OBJECTIVE:To assess the risk of pulmonary embolism, ischaemic stroke, and myocardial infarction associated with combined oral contraceptives according to dose of oestrogen (ethinylestradiol) and progestogen. DESIGN:Observational cohort study. SETTING:Data from the French national health insurance database linked with...
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
abstract:OBJECTIVE:To determine the relation between mothers' self reported drinking habits before, during, and after pregnancy and infants' mental and motor development at 18 months of age. DESIGN:Follow up study of all singleton live births born to primigravidas living in Dundee and booked into antenatal clinics from 1 May 1...
journal_title:BMJ (Clinical research ed.)
pub_type: 临床试验,杂志文章
doi:10.1136/bmj.303.6793.22
更新日期:1991-07-06 00:00:00
abstract:OBJECTIVE:To investigate clinical trialists' opinions and experiences of sharing of clinical trial data with investigators who are not directly collaborating with the research team. DESIGN AND SETTING:Cross sectional, web based survey. PARTICIPANTS:Clinical trialists who were corresponding authors of clinical trials ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.e7570
更新日期:2012-11-20 00:00:00
abstract::The benefits to medical practitioners of using the Internet are growing rapidly as the Internet becomes easier to use and ever more biomedical resources become available on line. The Internet is the largest computer network in the world; it is also a virtual community, larger than many nation states, with its own rule...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,评审
doi:10.1136/bmj.311.7017.1422
更新日期:1995-11-25 00:00:00
abstract:OBJECTIVE:To examine the association between intake of different types of alcoholic drinks and mortality. DESIGN:Prospective population study with baseline assessment of alcohol intake, smoking habit, income, education, and body mass index, and 10-12 years' follow up of mortality. SETTING:Copenhagen city heart study,...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.310.6988.1165
更新日期:1995-05-06 00:00:00
abstract::Research in general practice is becoming increasingly popular, and most general practitioners will sooner or later have to decide whether to become involved with clinical trials sponsored by drug companies. This paper outlines the advantages and disadvantages of multicentre research--based on experience of running a r...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.307.6915.1331
更新日期:1993-11-20 00:00:00
abstract:OBJECTIVES:To assess the incidence, time of day, and driver morbidity associated with vehicle accidents where the most likely cause was the driver falling asleep at the wheel. DESIGN:Two surveys were undertaken, in southwest England and the midlands, by using police databases or on the spot interviews. SUBJECTS:Drive...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.310.6979.565
更新日期:1995-03-04 00:00:00
abstract:OBJECTIVES:To determine whether there are important differences in performance between group practices and singlehanded general practitioners and the extent to which any differences are explained by practice characteristics such as deprivation. DESIGN:Cross sectional survey. SETTING:206 singlehanded practices and 606...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.323.7308.320
更新日期:2001-08-11 00:00:00
abstract:OBJECTIVE:To determine whether patients with unexpected prehospital cardiac arrest could be identified in whom ambulance resuscitation attempts would be futile. DESIGN:Review of ambulance and hospital records; detailed review of automated external defibrillator rhythm strips of patients in whom no shock was advised. ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.311.6996.49
更新日期:1995-07-01 00:00:00