O knowledge, where art thou? Evidence and suspected appendicitis      
OAKHQOL: a new instrument to measure quality of life in knee and hip osteoarthritis.      
Obesity prevention programs for children and youth: why are their results so modest?      
Obesity, the endocannabinoid system, and bias arising from pharmaceutical sponsorship      
Objective and self reported measurements of obesity: evidence from the Survey of Lifestyles, Attitudes and Nutrition [abstract]      
Objective response to chemotherapy as a potential surrogate end point of survival in metastatic breast cancer patients.      
Observation and experiment with the efficacy of drugs: a warning example from a cohort of nonsteroidal anti-inflammatory and ulcer-healing drug users.      
Observation or evidence? Are non-randomized studies really more generalizable than randomized trials? Poster presentation at the 16th Cochrane Colloquium: Evidence in the era of globalisation; 2008 Oct 3-7; Freiburg, Germany [abstract]      
Observational epidemiology is the preferred means of evaluating effects of behavioral and lifestyle modification      
An observational examination of the literature in diagnostic anatomic pathology.      
Observational studies analyzed like randomized experiments: an application to postmenopausal hormone therapy and coronary heart disease      
Observational studies analyzed like randomized trials: the intention to treat effect of drug use [abstract]      
Observational studies and randomized trials      
Observational studies in systemic reviews of comparative effectiveness: AHRQ and the Effective Health Care Program      
Observational studies of cause-effect relationships: an analysis of methodologic problems as illustrated by the conflicting data for the role of oral contraceptives in the etiology of rheumatoid arthritis      
Observational studies of depression in primary care: what do we know?      
An observational study comparing what authors report in randomized controlled trial publications with what they subsequently state on direct contact [abstract]      
An observational study found that authors of randomized controlled trials frequently use concealment of randomization and blinding, despite the failure to report these methods.      
An observational study of orthopaedic abstracts and subsequent full-text publications.      
Observational versus randomized medical device testing before and after market approval--the atherectomy-versus-angioplasty controversy      
Observations on the history of epidemiology in western New York, 1843-1960      
Observer bias in randomised clinical trial. An analysis of trials with both blinded and unblinded outcome observers. Oral presentation at the Joint Cochrane and Campbell Colloquium; 2010 Oct 18-22; Keystone, Colorado, USA [abstract]      
Observer bias in randomised clinical trials with continuous outcomes: an analysis of trials with both blind and non-blind outcome assessors. Poster presentation at the 19th Cochrane Colloquium; 2011 Oct 19-22; Madrid, Spain [abstract]      
Observer variation in assessment of quality of life in patients with oesophageal cancer      
Obstacles to answering doctors' questions about patient care with evidence: qualitative study.      
Obstacles to evaluation of adverse drug events (ADEs) occurring during pharmaceutical sponsored clinical trials of new cancer drugs: preliminary findings from the RADAR/IRB Study [abstract]      
Obstacles to researching the researchers: a case study of the ethical challenges of undertaking methodological research investigating the reporting of randomised controlled trials      
Obstetric technologies: what determines clinical acceptance or rejection of results of randomized controlled trials?      
Obstetricians' and midwives' contrasting perceptions of pregnancy      
Obtaining data from randomised trials: how much do we need in order to perform reliable and informative meta-analyses?      
Obtaining funding for IPD meta-analyses: top tips for a successful application. Poster presentation at the 19th Cochrane Colloquium; 2011 Oct 19-22; Madrid, Spain [abstract]      
Obtaining information accurately and quickly: are structured abstracts more efficient?      
Obtaining information on clinical trials: a challenging dilemma for Cochrane reviewers [abstract]      
Obtaining informed consent: comparison of conventional and nonconventional methods [abstract]      
Obtaining informed consent for genetic studies: The multiethnic study of atherosclerosis      
Obtaining informed consent in Bangladesh.      
Obtaining informed consent to neonatal randomised controlled trials: interviews with parents and clinicians in the Euricon study.      
[Obtaining medical ethical approval for a multicentre, randomised study: prospective evaluation of a ponderous process]      
Obtaining medically meaningful answers from an overview of randomized clinical trials      
Obtaining medically meaningful answers from an overview of randomized clinical trials - Discussion      
Obtaining published errata to randomised controlled trials: is it worth the effort? [abstract]      
Obtaining responses to sensitive questions: conventional questionnaire versus randomized response technique.      
Obtaining sensitive data through the Web: an example of design and methods.      
Obtaining useful information from expert based sources      
Occupational health nursing research priorities: a changing focus.      
Occupational health research priorities in Malaysia: a Delphi study.      
Occupational therapy articles in serial publications: an analysis of sources      
Occupational therapy research priorities in mental health.      
Odd man out: a graphical approach to meta-analysis      
An odd measure of risk: use and misuse of the odds ratio.      
Odds ratio, relative risk, absolute risk reduction, and the number needed to treat--which of these should we use?      
ODmixed: a tool to obtain optimal designs for heterogeneous longitudinal studies with dropout      
Of apples and oranges, file drawers and garbage: why validity issues in meta-analysis will not go away. [Review]      
Of babies and bathwater      
Of consents and CONSORTs: reporting ethics, law, and human rights in RCTs involving monitored overdose of healthy volunteers pre and post the "CONSORT" guidelines.      
Of mites and men: reference bias in narrative review articles: a systematic review.      
Of mites and men: reference bias in review articles [abstract]      
Of molecules, mice, and men: The relationship of biological complexity of research model to final rating in the grant peer review process of the Heart and Stroke Foundation of Canada [abstract]      
Of Nobel class: a citation perspective on high impact research authors      
Of sex and status: a study of the effects of gender and occupation on nurses' evaluations of nursing research.      
An off-the-shelf help list: a comprehensive catalog of preference scores from published cost-utility analyses. [Review]      
Offer of results and mail survey response from a commercial population: a test of Gouldner's Norm of Reciprocity.      
Offering a randomized trial of intensive therapy for IDDM to adolescents. Reasons for refusal, patient characteristics, and recruiter effects      
Offering mail survey results in a lift letter.      
Offering participants a choice of paper or online completion of a survey [abstract]      
Offering patients entry in clinical trials: preliminary study of the views of prospective participants.      
Offering patients entry in clinical trials: the views of prospective participants [abstract]      
Offering the option of randomized clinical trials to cancer patients who overestimate their prognoses with standard therapies      
Offering to return results to research participants: attitudes and needs of principal investigators in the Children's Oncology Group.      
Old evidence: survey of meta-analyses of medical interventions [abstract]      
Older Australians' medication use: self-report by phone showed good agreement and accuracy compared with home visit      
Older people specific health status and quality of life: a structured review of self-assessed instruments.      
OMERACT: An international initiative to improve outcome measurement in rheumatology.      
On a model-based approach to estimating efficacy in clinical trials      
On being the statistician on a Data and Safety Monitoring Board.      
On bias      
On coenrollment in clinical resuscitation studies: review and experience from randomized trials      
On combining dose-response data from epidemiological studies by meta-analysis [see comments]      
On combining information: statistical issues and opportunities for research      
On design considerations and randomization-based inference for community intervention trials      
On dinosaurs and medical textbooks      
On editing the Journal: Ave atque vale      
On estimating efficacy from clinical trials [published erratum appears in Stat Med 1994 Sep 30;13(18):1897]      
On food frequency questionnaires: the contribution of open-ended questions and questions on ethnic foods.      
On inferences from Wei's biased coin design for clinical trials      
On knowing what we do not know: an empirical comparison of methods to detect publication bias in meta-analysis.      
On-line access to a cost-benefit/cost-effectiveness analysis bibliography via CDC WONDER      
On problems related to subgroup analyses in clinical trials      
On promises and premises in qualitative general practice research      
On reporting results from randomized controlled trials with recurrent events.      
On requesting conference papers electronically.      
On requesting re-prints electronically.      
An on-site audit of the South African trial of high-dose chemotherapy for metastatic breast cancer and associated publications.      
On some applications of Bayesian methods in cancer clinical trials      
On tests of the overall treatment effect in meta-analysis with normally distributed responses      
On the association between journal circulation and impact factor      
On the bias produced by quality scores in meta-analysis, and a hierarchical view of proposed solutions      
On the causal structure of information bias and confounding bias in randomized trials      
On the design and analysis of randomized clinical trials with multiple endpoints [see comments]      
On the development of the Medical Research Council trial of alpha-interferon in metastatic renal carcinoma. Urological Working Party Renal Carcinoma Subgroup      
On the elicitation of preferences for alternative therapies      
On the equivalence of meta-analysis using literature and using individual patient data      
On the evaluation of the clinical effects of acupuncture.      
On the evolution of statistical methods as applied to clinical trials.      
On the importance of using multiple methods of dietary assessment      
On the likelihood of finding subgroup differences in clinical trials [abstract]      
On the performance of random-coefficient pattern-mixture models for non-ignorable drop-out.      
On the possibility of incorporating patients from non-randomising centres into a randomised clinical trial      
On the relationship between quantity and quality of a country's research productivity      
On the relationship between response to treatment and survival time      
On the role of baseline measurements for crossover designs under the self and mixed carryover effects model      
On the scholarly use of electronic journals: trends and issues from the mid 1990s      
On the social psychology of using research reviews: the case of desegregation and black achievement      
On the synthesis and interpretation of consistent but weak gene-disease associations in the era of genome-wide association studies.      
[On the use of the Internet for health and illness issues in Portugal: repercussions in the physician-patient relationship]      
On the utility of the Dirichlet distribution for meta-analysis of clinical studies      
On the validity of meta-analyses: exhaustivity must be warranted, exclusion of duplicate patients too      
On the value of large multicenter drug intervention trials      
Oncological research overview in the European Union. A 5-year survey      
Oncologists' knowledge, attitudes and practices related to cancer treatment clinical trials      
Oncologists' reluctance to accrue patients onto clinical trials: an Illinois Cancer Center study      
Oncologists' use of quality of life information: results of a survey of Eastern Cooperative Oncology Group physicians.      
Oncology Nursing Society year 2004 research priorities survey.      
Oncology treatment recommendations can be supported only by 1-2% of high-quality published evidence.      
One hundred citation classics in general surgical journals      
One hundred searches: refining the process of identifying articles for systematic reviews [abstract]      
One hundred years of schizophrenia: A meta-analysis of the outcome literature      
Ongoing trials in health technology assessment - a survey [abstract]      
Online access to journal abstracts and articles      
Online access to MEDLINE in clinical settings. A study of use and usefulness      
Online bioterrorism continuing medical education: development and preliminary testing      
Online Databases in the Medical and Life Sciences      
Online health information search and evaluation: observations and semi-structured interviews with college students and maternal health experts      
Online information, extreme communities and internet therapy: is the internet good for our mental health?      
Online information resources of toxicology in Sweden.      
Online information retrieval in pharmacy and related fields      
Online journals' impact on the citation patterns of medical faculty.      
Online journals' impact on the citation patterns of medical faculty      
Online on the spot: connecting the general practitioner, the patient and the evidence through an evidence-based internet approach in medical consultation [abstract]      
Online on-the-spot searching increases use of evidence during consultations in family practice      
Online presentations as a source of scientific impact? An analysis of PowerPoint files citing academic journals      
Online retrieval of environmental and occupational health literature: a comparative study.      
Online tables of contents for books: effect on usage.      
Online tools to transfer evidence-based information to consumers: consumer summaries and patient decision aids [abstract]      
Online use and information seeking behaviour: institutional and subject comparisons of UK researchers      
Ontology-based information extraction: an introduction and a survey of current approaches      
Onychomycosis: quality of studies      
Oophorectomy for breast cancer: history revisited      
Open access and openly accessible: a study of scientific publications shared via the internet.      
Open access deposition policies: what does it mean for medical journals [abstract]      
Open access for best evidence in the era of globalization. Poster presentation at the 16th Cochrane Colloquium: Evidence in the era of globalisation; 2008 Oct 3-7; Freiburg, Germany [abstract]      
The open access movement and Cuban health research work: an author survey      
Open access to the scientific journal literature: situation 2009      
Open-label non-randomized versus double-blind randomized antidepressive treatment: what are the advantages of clinical decision over randomization?      
An open letter to the FDA regarding changes in reporting procedures for drugs and biologics proposed in the wake of the FIAU tragedy      
Open peer review: a randomised controlled trial.      
Open- vs. restricted-domain QA systems in the biomedical field      
Operating characteristics of a rank correlation test for publication bias      
The operation was a success (but the patient died)      
Operational aspects of terminating the doxazosin arm of The Antihypertensive and Lipid Lowering Treatment to Prevent Heart Attack Trial (ALLHAT).      
Operationalising a model framework for consumer and community participation in health and medical research.      
Ophthalmology and vision science research. Part 1: Understanding and using journal impact factors and citation indices.      
Opiate withdrawal: inpatient versus outpatient programmes and preferred versus random assignment to treatment.      
Opinions of researchers based in the UK on recruiting subjects from developing countries into randomized controlled trials.      
Opinions on registering trial details: a survey of academic researchers.      
Opportunities and challenges for improving the quality of reporting clinical research: CONSORT and beyond.      
Opposition to unpopular research results: Finnish professional reactions to the WHI findings.      
Opt out as an acceptable method of obtaining consent in medical research [abstract]      
Optimal CINAHL search strategies for identifying therapy studies and review articles.      
Optimal multivariate matching before randomization      
Optimal retrieval of HIV/AIDS conference proceeding abstracts: a comparison of databases [abstract]      
Optimal search strategies for detecting clinically sound prognostic studies in EMBASE: an analytic survey.      
Optimal search strategies for detecting cost and economic studies in EMBASE.      
Optimal search strategies for detecting health services research studies in MEDLINE.      
Optimal search strategies for identifying mental health content in MEDLINE: an analytic survey.      
Optimal search strategies for identifying sound clinical prediction studies in EMBASE.      
Optimal search strategies for retrieving scientifically strong studies of diagnosis from Medline: analytical survey      
Optimal search strategies for retrieving scientifically strong studies of treatment and diagnosis from MEDLINE: an analytical survey [abstract]      
Optimal search strategies for retrieving scientifically strong studies of treatment from Medline: analytical survey.      
Optimal search strategies for retrieving systematic reviews from Medline: analytical survey      
Optimal search strategy for clinical trials in the Latin American and Caribbean Health Science Literature Database (LILACS)      
Optimal search strategy for clinical trials in the Latin American and Caribbean Health Science Literature Database (LILACS database): update      
Optimal two-stage designs for clinical trials based on safety and efficacy      
Optimising patient recall of adverse events over prolonged time periods [abstract]      
Optimism bias leads to inconclusive results - an empirical study      
Optimistic bias in the assessment of sensitivity and specificity      
Optimization of testing times and critical values in sequential equivalence testing      
Optimized retrieval of primary care clinical prediction rules from MEDLINE to establish a Web-based register      
Optimizing search strategies to identify randomized controlled trials in MEDLINE.      
Optimizing search strategies to identify randomized controlled trials in MEDLINE [abstract]      
Optimizing the tracking of falls in studies of older participants: comparison of quarterly telephone recall with monthly falls calendars in the MOBILIZE Boston Study      
Options for handling missing data in the Health Utilities Index Mark 3      
Oral bisphosphonates and upper gastrointestinal tract problems: what is the evidence? [Review]      
Oral presentation bias: a retrospective cohort study      
The ORBIT Study: outcome reporting bias in trials - interviews with trialists who do and do not report all outcomes. Oral presentation at the 16th Cochrane Colloquium: Evidence in the era of globalisation; 2008 Oct 3-7; Freiburg, Germany [abstract]      
The ORBIT study: outcome reporting bias in trials - interviews with trialists who do and do not report all outcomes. Oral presentation at the 17th Cochrane Colloquium; 2009 Oct 11-14, Singapore [abstract]      
ORBIT study: outcome reporting bias in trials - primary outcomes in Cochrane systematic reviews. Oral presentation at the 17th Cochrane Colloquium; 2009 Oct 11-14, Singapore [abstract]      
Order effects: a randomised study of three major cancer-specific quality of life instruments.      
Order effects: a study of the possible influence of presentation order on user judgments of document relevance      
OReFiL: an online resource finder for life sciences      
[Organisational issues in implementing clinical trials in primary care]      
Organising access to Evidence-Based Medicine resources on the Web.      
Organization and analysis of safety data using a multivariate approach      
Organizing a reviewing strategy      
[Original articles in the Netherlands Tijdschrift voor Geneeskunde in the second part of the 20th century: type of research described and the number and background of authors]      
[Original articles published in Medicina Clinica during 30 years (1962-1992): number of authors, interval between acceptance and publication and bibliographic references]      
The origins, evolution, and future of The Cochrane Database of Systematic Reviews      
Orphan comparisons and indirect meta-analysis: a case study on antidepressant efficacy in dysthymia comparing tricyclic antidepressants, selective serotonin reuptake inhibitors, and monoamine oxidase inhibitors by using general linear models.      
Orthodontic Clinical Trials III: reporting of ethical issues associated with clinical trials published in three orthodontic journals between 1989 and 1998.      
Orthodontic literature: an overview of the last 2 decades      
Orthopaedic clinical research. Deficiencies in experimental design and determinations of outcome.      
Orthopaedic fractures: trends in randomised controlled trials.      
Orthopaedic nursing research priorities: a Delphi study.      
Orthopaedic surgeons prefer to participate in expertise-based randomized trials      
Osteoporosis clinical trials endpoints: candidate variables and clinimetric properties      
The other half of the whole: teaching patients to communicate with physicians.      
The other side of statistical significance: a review of type II errors in the Australian medical literature.      
OTseeker helps library and allied health professionals to find quality evidence efficiently      
[The Ottawa Statement, Part One: Principles for International REgistration of Protocol Information and Results from Human Trials of Health-related Interventions]      
The Ottawa Statements: principles and implementation of clinical trials registration and results reporting [abstract]      
The Ottawa Stroke Trials Registry Collaborative Group and the development of the Ottawa Stroke Trials Registry (OSTR)      
Our medical literature      
Our medical literature - then and now.      
Out of the shadows: registration of unreported trials      
Out with the old, in with the new: identifying health technologies for disinvestment - can early awareness and alert systems play a part? [abstract]      
Outcome assessment for clinical trials: how many adjudicators do we need? Canadian Lung Oncology Group      
Outcome assessment in randomized controlled trials of stroke rehabilitation      
Outcome assessment of the VADO approach in psychiatric rehabilitation: a partially randomised multicentric trial.      
Outcome, attrition, and family-couples treatment for drug abuse: a meta-analysis and review of the controlled, comparative studies.      
Outcome criteria in smoking cessation trials: proposal for a common standard.      
Outcome effects of receiving a preferred, randomly assigned, or nonpreferred therapy.      
Outcome measurement in clinical trials for ulcerative colitis: toward standardisation.      
Outcome measures in acute stroke trials: a systematic review and some recommendations to improve practice.      
Outcome measures in palliative care for advanced cancer patients: a review      
Outcome measures in split mouth caries trials and their statistical evaluation [see comments]      
Outcome measures to assess walking ability following stroke: a systematic review of the literature      
Outcome measures used in Chinese acute stroke trials [abstract]      
The outcome of control groups in clinical trials of conservative treatments for chronic mechanical neck pain: a systematic review.      
Outcome of phase II oncology clinical trial abstracts presented at annual meeting of the American Society of Clinical Oncology (ASCO) [abstract]      
Outcome of ST-elevation myocardial infarction treated with thrombolysis in the unselected population is vastly different from samples of eligible patients in a large-scale clinical trial.      
Outcome of surgery for chronic Achilles tendinopathy. A critical review. [Review]      
Outcome reporting among drug trials registered in ClinicalTrials.gov      
Outcome reporting bias and individual patient data meta-analysis: a case study in surgery [abstract]      
Outcome reporting bias and individual patient data meta-analysis: a case study in surgery The EU Hernia Trialists Collaboration [abstract]      
Outcome reporting bias in government-funded RCTs.      
Outcome reporting bias in randomized trials funded by the Canadian Institutes of Health Research      
Outcome reporting bias in trials (ORBIT). Oral presentation at the 17th Cochrane Colloquium; 2009 Oct 11-14, Singapore [abstract]      
Outcome reporting in industry-sponsored trials of gabapentin for off-label use      
Outcome selection bias in meta-analysis.      
Outcome variables and their assessment in alcohol treatment studies: 1968-1998. [Review]      
Outcomes assessment in the SPRINT multicenter tibial fracture trial: adjudication committee size has trivial effect on trial results      
Outcomes by gender in the African-American Heart Failure Trial.      
Outcomes from NHMRC public health research project grants awarded in 1993      
Outcomes from the Patient Perspective Workshop at OMERACT 6.      
Outcomes in acute pain trials: systematic review of what was reported?      
Outcomes in randomized controlled trials in psoriasis: what has changed over the last 20 years?      
Outcomes of cytopathology studies presented at national pathology meetings.      
Outcomes of educational interventions in type 2 diabetes: WEKA data-mining analysis.      
Outcomes of patients in clinical trials with ST-segment elevation myocardial infarction among countries with different gross national incomes.      
Outcomes of patients who participate in randomised controlled trials compared to similar patients receiving similar interventions who do not participate      
Outcomes research and surgeons      
Outcomes research in oncology: history, conceptual framework, and trends in the literature. [Review]      
Outcomes research in pediatric settings: recent trends and future directions. [Review]      
Outcomes research in the development and evaluation of practice guidelines      
Outcomes validity and reliability of the modified Rankin scale: implications for stroke clinical trials: a literature review and synthesis.      
Outpatients' knowledge about and attitude towards clinical research and randomized clinical trials. The INFO Trial Group.      
Ovarian ablation in breast cancer, 1896 to 1998: milestones along hierarchy of evidence from case report to Cochrane review      
Ovarian ablation In breast cancer: 1948-1998, the 50 year journey from randomised trial to Cochrane review [abstract]      
Ovarian ablation - why the Early Breast Cancer Trialists' Collaborative Group's (EBCTCG) individual patient data meta-analysis was needed [abstract]      
Over 50 years of trial in Acta Psychiatrica Scandinavica: a survey      
Over- and underestimation of the sensitivity of a diagnostic malignancy test due to various selections of the study population      
Over-interpretation of molecular diagnostic based research [abstract]      
Over-the-counter cold medications. A critical review of clinical trials between 1950 and 1991.      
Overall and minority-focused recruitment strategies in the PREMIER multicenter trial of lifestyle interventions for blood pressure control      
Overall survival in the intervention arm of a randomized controlled screening trial for prostate cancer compared with a clinically diagnosed cohort.      
Overall survival (OS) in contemporary randomized clinical trials (RCT) in advanced breast cancer (ABC) [abstract]      
Overcoming barriers to accrual: an assessment of 1,187 cancer patients' (Pts) and caregivers' awareness of and willingness to participate in cancer clinical trials (CCTs) [abstract]      
Overcoming barriers to cancer clinical trial accrual: impact of a mass media campaign      
Overcoming barriers to recruitment and retention in adolescent smoking cessation.      
Overcoming challenges in designing and implementing a phase II randomized controlled trial using a presurgical model to test a dietary intervention in prostate cancer      
Overcoming the limitations of current meta-analysis of randomised controlled trials [see comments]      
Overcoming 'trial fatigue': A strategy for optimizing patient accrual speed and resource utilization      
Overestimation of treatment benefits in single-centre osteoarthritis trials may be related to sample size: meta-epidemiological study. Poster presentation at the 19th Cochrane Colloquium; 2011 Oct 19-22; Madrid, Spain [abstract]      
Overestimation of treatment effects associated with small sample size in osteoarthritis research. Poster presentation at the 16th Cochrane Colloquium: Evidence in the era of globalisation; 2008 Oct 3-7; Freiburg, Germany [abstract]      
Overinterpretation of clinical applicability in molecular diagnostic research      
Overinterpretation of results in diagnostic test accuracy studies: evidence of ''spin''. Poster presentation at the 19th Cochrane Colloquium; 2011 Oct 19-22; Madrid, Spain [abstract]      
Overstating the evidence: double counting in meta-analysis and related problems      
An overview of 45 published database resources for complementary and alternative medicine      
An overview of information resources for herbal medicinals and dietary supplements      
An overview of meta-analyses of diagnostic tests in infectious diseases      
An overview of methods and empirical comparison of aggregate data and individual patient data results for investigating heterogeneity in meta-analysis of time-to-event outcomes.      
An overview of methods for the analysis of longitudinal data      
Overview of randomized clinical trials of lipid intervention for atherosclerotic cardiovascular disease      
[Overview of research in Chile by several epistemolometric indicators]      
An overview of rheumatological research in the European Union      
An overview of six clinical trials of aspirin in coronary heart disease      
Overview of systematic reviews on invasive treatment of stable coronary artery disease      
An overview of the design and methods for retrieving high-quality studies for clinical care.      
An overview of the design of clinical trials for traditional Chinese medicine [abstract]      
An overview of the effects of peer review on the assessment of scientific submissions to journals and grant-giving bodies methodological issues      
Overviews of overviews: how to summarise and grade evidence? [abstract]      
Overviews of respiratory rehabilitation in chronic obstructive pulmonary disease.      
Overviews of systematic reviews often do not assess methodological quality of included reviews. Poster presentation at the 19th Cochrane Colloquium; 2011 Oct 19-22; Madrid, Spain [abstract]      
Overviews - the way forward for the collaboration? [abstract]      
Overweight in relation to tumour size and axillary lymph node involvement in postmenopausal breast cancer patients - differences between women invited to vs. not invited to mammography in a randomized screening trial      
Overwhelming heterogeneity in systematic reviews of observational anti-epileptic studies      
The Oxford Database of Perinatal Trials: developing a register of published reports of controlled trials      
Oxygen as a cause of blindness in premature infants: "autopsy" of a decade of errors in clinical epidemiologic research