Abstract:
OBJECTIVE:To determine whether poor reporting of methods in randomised controlled trials reflects on poor methods. DESIGN:Observational study. SETTING:Reports of randomised controlled trials conducted by the Radiation Therapy Oncology Group since its establishment in 1968. PARTICIPANTS:The Radiation Therapy Oncology Group. Outcome measures Content of reports compared with the design features described in the protocols for all randomised controlled trials. RESULTS:The methodological quality of 56 randomised controlled trials was better than reported. Adequate allocation concealment was achieved in all trials but reported in only 42% of papers. An intention to treat analysis was done in 83% of trials but reported in only 69% of papers. The sample size calculation was performed in 76% of the studies, but reported in only 16% of papers. End points were clearly defined and alpha and beta errors were prespecified in 76% and 74% of the trials, respectively, but only reported in 10% of the papers. The one exception was the description of drop outs, where the frequency of reporting was similar to that contained in the original statistical files of the Radiation Therapy Oncology Group. CONCLUSIONS:The reporting of methodological aspects of randomised controlled trials does not necessarily reflect the conduct of the trial. Reviewing research protocols and contacting trialists for more information may improve quality assessment.
journal_name
BMJjournal_title
BMJ (Clinical research ed.)authors
Soares HP,Daniels S,Kumar A,Clarke M,Scott C,Swann S,Djulbegovic B,Radiation Therapy Oncology Group.doi
10.1136/bmj.328.7430.22keywords:
subject
Has Abstractpub_date
2004-01-03 00:00:00pages
22-4issue
7430eissn
0959-8138issn
1756-1833pii
328/7430/22journal_volume
328pub_type
杂志文章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
abstract:OBJECTIVE:To compare neonatal mortality and morbidity in term infants presenting by the breech and delivered vaginally or by caesarean section. DESIGN:Population based comparison of outcomes. Data derived from the St Mary's maternity information system. SETTING:North West Thames Regional Health Authority, 1988-90. S...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.305.6856.746
更新日期:1992-09-26 00:00:00
abstract:OBJECTIVE:To investigate estimation of calorie (energy) content of meals from fast food restaurants in adults, adolescents, and school age children. DESIGN:Cross sectional study of repeated visits to fast food restaurant chains. SETTING:89 fast food restaurants in four cities in New England, United States: McDonald's...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.f2907
更新日期:2013-05-23 00:00:00
abstract::Objectives To estimate small for gestational age birth prevalence and attributable neonatal mortality in low and middle income countries with the INTERGROWTH-21st birth weight standard.Design Secondary analysis of data from the Child Health Epidemiology Reference Group (CHERG), including 14 birth cohorts with gestatio...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.j3677
更新日期:2017-08-17 00:00:00
abstract:OBJECTIVE:To quantify the impact of citalopram and other selective serotonin reuptake inhibitors on corrected QT interval (QTc), a marker of risk for ventricular arrhythmia, in a large and diverse clinical population. DESIGN:A cross sectional study using electrocardiographic, prescribing, and clinical data from electr...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.f288
更新日期:2013-01-29 00:00:00
abstract:OBJECTIVES:To prospectively assess the diagnostic performance of simple ultrasound rules to predict benignity/malignancy in an adnexal mass and to test the performance of the risk of malignancy index, two logistic regression models, and subjective assessment of ultrasonic findings by an experienced ultrasound examiner ...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究
doi:10.1136/bmj.c6839
更新日期:2010-12-14 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:OBJECTIVES:To estimate the prevalence and incidence of divorce among US physicians compared with other healthcare professionals, lawyers, and non-healthcare professionals, and to analyze factors associated with divorce among physicians. DESIGN:Retrospective analysis of nationally representative surveys conducted by th...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.h706
更新日期:2015-02-18 00:00:00
abstract:OBJECTIVE:To investigate the independent effects of intake of fruit and vegetables on incidence of type 2 diabetes. DESIGN:Systematic review and meta-analysis. DATA SOURCES:Medline, Embase, CINAHL, British Nursing Index (BNI), and the Cochrane library were searched for medical subject headings and keywords on diabete...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,meta分析,评审
doi:10.1136/bmj.c4229
更新日期:2010-08-18 00:00:00
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...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.39405.539282.BE
更新日期:2008-01-12 00:00:00
abstract::A random sample of 133 elderly patients who had an unplanned readmission to a district general hospital within 28 days of discharge from hospital was studied and compared with a matched control sample of patients who were not readmitted. The total group was drawn from all specialties in the hospital, and by interviewi...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.297.6651.784
更新日期:1988-09-24 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::The right of consultants to study leave and expenses is not binding on trusts and has been eroded in directly managed units. Complaints led to a survey of consultants in North West Thames region. This showed that most consultants use their own time and money to maintain their knowledge by buying and consulting journal...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.306.6889.1398
更新日期:1993-05-22 00:00:00
abstract::Objective To estimate the incidence and prevalence of resistant hypertension among a UK population treated for hypertension from 1995 to 2015.Design Cohort study.Setting Electronic health records from the UK Clinical Practice Research Datalink in primary care.Participants 1 317 290 users of antihypertensive drugs with...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.j3984
更新日期:2017-09-22 00:00:00
abstract::Diabetic ketoacidosis and hyperosmolar hyperglycemic syndrome (HHS) are life threatening complications that occur in patients with diabetes. In addition to timely identification of the precipitating cause, the first step in acute management of these disorders includes aggressive administration of intravenous fluids wi...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,评审
doi:10.1136/bmj.l1114
更新日期:2019-05-29 00:00:00
abstract:OBJECTIVE:To assess the association between macrolide antibiotics prescribing during pregnancy and major malformations, cerebral palsy, epilepsy, attention deficit hyperactivity disorder, and autism spectrum disorder in children. DESIGN:Population based cohort study. SETTING:The UK Clinical Practice Research Datalink...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.m331
更新日期:2020-02-19 00:00:00
abstract:OBJECTIVE:To examine differences in morbidity and mortality due to non-insulin dependent diabetes in African Caribbeans and Europeans. DESIGN:Cohort study of patients with non-insulin dependent diabetes drawn from diabetes clinics in London. Baseline investigations were performed in 1975-7; follow up continued until 1...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.313.7061.848
更新日期:1996-10-05 00:00:00
abstract:OBJECTIVE:To determine whether the intervention of a physiotherapist improved mobility in patients seen more than one year after stroke. DESIGN:Randomised crossover trial comparing two groups offered intervention by a physiotherapist, one immediately after entry into the trial and the other after a delay of three mont...
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.304.6827.609
更新日期:1992-03-07 00:00:00
abstract:OBJECTIVE:To obtain information about the computerisation of general practice in Wales, and to enable more effective planning of educational provision for doctors and other primary health care workers. DESIGN:Postal questionnaire sent to all general practices in Wales. SUBJECTS:553 general practices, of which 401 (73...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.303.6794.93
更新日期:1991-07-13 00:00:00
abstract:OBJECTIVE:To quantify and compare the contribution of 306 diseases and injuries to the changes in health adjusted life expectancy at birth (HALE0) between 1990 and 2013. DESIGN:Retrospective demographic analysis based on aggregated data and using life table technique, Sullivan method, and decomposition method for diff...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.l969
更新日期:2019-03-27 00:00:00
abstract:OBJECTIVE:To undertake a cost effectiveness analysis comparing first and second generation endometrial ablative techniques, hysterectomy, and the levonorgestrel releasing intrauterine system (Mirena) for treating heavy menstrual bleeding. DESIGN:Model based economic evaluation with data from an individual patient data...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,meta分析,评审
doi:10.1136/bmj.d2202
更新日期:2011-04-26 00:00:00
abstract::The Swedish government recently published a report on priorities in health care. It was written by a cross party group of politicians and drew extensively on the views of the public, health professionals, experience of earlier local exercises in priority setting, and research based evidence. It laid down an ethical fr...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.312.7032.691
更新日期:1996-03-16 00:00:00
abstract:OBJECTIVE:To examine the effectiveness of post-diagnosis dementia treatment and coordination of care by memory clinics compared with general practitioners. DESIGN:Multicentre randomised controlled trial. SETTING:Nine memory clinics and 159 general practitioners in the Netherlands. PARTICIPANTS:175 patients with a ne...
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.e3086
更新日期:2012-05-15 00:00:00
abstract:OBJECTIVE:To determine medical students' self awareness and ability to discriminate right from left; to identify characteristics associated with this ability; and to identify any techniques used to aid discrimination. DESIGN:Questionnaire and psychometric study. SETTING:Undergraduate medical school, Northern Ireland....
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.a2826
更新日期:2008-12-16 00:00:00
abstract:OBJECTIVE:To document the relative importance of endogenous sex steroids in modulating the frequency of orgasms, the dominant aspect of sexual behaviour in healthy eugonadal men. DESIGN:Measurement of adrenal and testicular sex steroids in a sample of army recruits and study of their relation to frequency of orgasms a...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.310.6990.1289
更新日期:1995-05-20 00:00:00
abstract:OBJECTIVE:To determine whether being overweight in childhood increases adult obesity and risk of disease. DESIGN:Prospective cohort study. SETTING:City of Newcastle upon Tyne. PARTICIPANTS:932 members of thousand families 1947 birth cohort, of whom 412 attended for clinical examination age 50. MAIN OUTCOME MEASURES...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.323.7324.1280
更新日期:2001-12-01 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:OBJECTIVES:To investigate the feasibility of obtaining signed consent for submission of patient identifiable data to a national clinical audit database and to identify factors influencing the consent process and its success. DESIGN:Feasibility study. SETTING:Seven paediatric intensive care units in England. PARTICIP...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章,多中心研究
doi:10.1136/bmj.38404.650208.AE
更新日期:2005-04-16 00:00:00
abstract::The issue of children on hunger strike (voluntary total fasting) has not been reported before. The World Medical Association Declaration of Tokyo 1975 and the Declaration of Malta 1991 (revised 1992) provide clinicians with guidelines for the management of adult patients on hunger strike but do not mention children. W...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.312.7029.501
更新日期:1996-02-24 00:00:00
abstract:OBJECTIVE:To determine the risk of chronic kidney disease in patients with psoriasis. DESIGN:Population based cohort study and nested cross sectional study. SETTING:Electronic medical records database based in United Kingdom. PARTICIPANTS:Cohort study: patients with psoriasis aged 18-90 each matched to up to five pa...
journal_title:BMJ (Clinical research ed.)
pub_type: 杂志文章
doi:10.1136/bmj.f5961
更新日期:2013-10-15 00:00:00