Labelling in hypertension: a review of the behavioural and psychological consequences.      
Labour-saving strategies to maintain survey response rates: a randomised trial.      
Lack of added-value from double data entry [abstract]      
Lack of clinical rationale provided for non-inferiority margins [abstract]      
Lack of correlation between satisfaction and knowledge in clinical trials participants: a pilot study.      
Lack of detail and uniformity in the reporting of adverse drug reactions in randomized controlled trials: important implications for systematic reviews [abstract]      
Lack of equity reporting in Cochrane reviews of effectiveness in chronic obstructive pulmonary disease. Oral presentation at the 19th Cochrane Colloquium; 2011 Oct 19-22; Madrid, Spain [abstract]      
Lack of publication bias in randomized clinical trials (RCTs) sponsored by the National Cancer Institute (NCI) and performed by Cooperative Oncology Groups (COGs) [abstract]      
Lack of scientific evidence for the treatment of lateral epicondylitis of the elbow. An attempted meta-analysis.      
The Lancet's statistical review process: areas for improvement by authors.      
A landmark for Popperian epidemiology: refutation of the Randomised Aldactone Evaluation Study.      
Landmark survival as an end-point for trials in critically ill patients - comparison of alternative durations of follow-up: an exploratory analysis      
Language and country preponderance trends in MEDLINE and its causes.      
Language and geographical differences in the access to Cochrane reviews. Oral presentation at the 16th Cochrane Colloquium: Evidence in the era of globalisation; 2008 Oct 3-7; Freiburg, Germany [abstract]      
Language and publication in "Cardiovascular Research" articles      
Language and rigour in qualitative research: problems and principles in analyzing data collected in Mandarin.      
Language barriers and bibliographic retrieval effectiveness: use of MEDLINE by French-speaking end users      
Language bias in a systematic review of chronic pain: how to prevent the omission of non-English publications?      
Language bias in randomised controlled trials published in English and German [see comments]      
Language criteria used in systematic review could negatively influence final conclusions of technology evaluation [abstract]      
[The language of medicine as presented in the references of original articles published in Medicina Clinica for 50 years (1945-1995)]      
[The language of medicine in Austria (1920-1995)]      
[The language of medicine in Switzerland 1920 to 1995]      
Language of publication of journal articles on suicide and mental disorders      
Language of publication restrictions in systematic reviews gave different results depending on whether the intervention was conventional or complementary.[erratum appears in J Clin Epidemiol. 2006 Feb;59(2):216].      
The language we write      
Laparoscopic techniques versus open techniques for inguinal hernia repair.      
Large monetary incentives and their effect on mail survey response rates.      
Large-scale clinical trials: are they worth the cost?      
"Large simple studies": flexible data entry solutions to minimize data entry and reporting errors [abstract]      
[Large trials vs meta-analysis of smaller trials]      
Large trials vs meta-analysis of smaller trials      
Large trials vs meta-analysis of smaller trials      
Large trials vs. meta-analysis of smaller trials. How do their results compare?      
Large trials with simple protocols: indications and contraindications      
Larger effect sizes were associated with higher quality ratings in complementary and alternative medicine randomized controlled trials.      
The last word in trial quality? The impact of selection and performance bias within a series of integrated systematic reviews [abstract]      
Late-starter sites in randomized controlled trials      
Latin America and health technology assessment: a content analysis [abstract]      
Latin American biomedical publications: the case of Colombia in Medline.      
Latin American nephrology: scientific production and impact of the publications.      
Latina recruitment for cancer prevention education via Community Based Participatory Research strategies      
Lay conceptions of the ethical and scientific justifications for random allocation in clinical trials      
Lay information mediary behavior uncovered: exploring how nonprofessionals seek health information for themselves and others online      
Lay people empowerment: the ''PartecipaSalute'' experience.      
Lay persons' and professionals' nutrition-related vocabularies and their matching to a general and a specific thesaurus      
A lay person's perspective on starting and stopping clinical trials      
Lay public's understanding of equipoise and randomisation in randomised controlled trials.      
LDL-cholesterol differences predicted survival benefit in statin trials by the surrogate threshold effect (STE)      
Learning about clinical trials: the Western multicentre, randomized, double-blind, placebo-controlled clinical trial on the effect of caffeine on alertness and cardiovascular parameters.      
Learning by doing: teaching critical appraisal of randomized trials by performing an in-class randomized trial.      
Learning from our patients: one participant's impact on clinical trial research and informed consent      
Learning from past mistakes: assessing trial quality, power and eligibility in non-renal systemic lupus erythematosus randomized controlled trials      
Learning from research on the information behaviour of healthcare professionals: a review of the literature 2004-2008 with a focus on emotion      
Leave no stone unturned.      
The legacy of stress research. The course and the impact of this journal      
The legitimacy of clinical knowledge: towards a medical epistemology embracing the art of medicine      
Length of follow-up and meta-analysis [abstract]      
Less than half of the Cochrane Reviews are current [abstract]      
Lessons for search strategies from a systematic review, in The Cochrane Library, of nutritional supplementation trials in patients after hip fracture      
Lessons for successful study enrollment from the Veterans Affairs/National Institutes of Health Acute Renal Failure Trial Network Study.      
Lessons from a review of publications in three health promotion journals from 1989 to 1994      
Lessons from overviews of cardiovascular trials      
Lessons in initiating insulin in clinical practice      
Lessons learned combining N-of-1 trials to assess fibromyalgia therapies      
Lessons learned from a failed multi-institutional randomized controlled study.      
Lessons learned from a prospective meta-analysis      
Lessons learned from community-based participatory research in Indian country      
Lessons learned from decision analysis      
Lessons learned from enrollment in the BEST study - a multicenter, randomized trial of group psychosocial support in metastatic breast cancer.      
Lessons learned from measuring health-related quality of life in oncology      
Lessons learned from recruiting young female students to a randomised controlled trial of chlamydia screening.      
Lessons learned in participant recruitment and retention: the EXCITE trial.      
Lessons learned while conducting research on prevention of pressure ulcers in veterans with spinal cord injury.      
Letters to the editor 1991. An audit of the MJA's correspondence columns      
Level of evidence and citation index in current neurosurgical publications. [Review]      
Level of evidence and conflict of interest disclosure associated with higher citation rates in orthopedics      
Level of evidence in evidence-based guidelines in colorectal surgery [abstract]      
Level of evidence in Spine compared to other orthopedic journals.      
The level of Internet access and ICT training for health information professionals in sub-Saharan Africa      
Levels of consciousness and awareness about evidence-based medicine among consultants in tertiary health care institutions in Nigeria      
Levels of evidence and the conclusions of the Cochrane systematic reviews. Poster presentation at the 17th Cochrane Colloquium; 2009 Oct 11-14, Singapore [abstract]      
Levels of evidence: how to deal with flawed studies [abstract]      
Levels of evidence of articles in podiatric medical journals.      
[Levels of scientific evidence and grades of recommendations: methodological considerations] [Portuguese]      
Leverage your evidence: analyze the evidence base of your systematic review to inform the update search. Oral presentation at the 17th Cochrane Colloquium; 2009 Oct 11-14, Singapore [abstract]      
Librarian participation in meta-analysis projects      
Librarians 2.0: sowing padi in (the) SEA (South East Asia Region)      
Library use of public health materials: description and anaylsis      
Life and times of the impact factor: retrospective analysis of trends for seven medical journals (1994-2005) and their Editors' views      
Life cycle of a Cochrane review [abstract]      
Life cycle of Cochrane Reviews      
Life-years gained from modern cardiological treatments and population risk factor changes in England and Wales, 1981-2000      
Lignocaine prophylaxis in acute myocardial infarction: an evaluation of randomised trials      
A likelihood approach to meta-analysis with random effects      
The likelihood of participation in clinical trials can be measured: the Clinical Research Involvement Scales      
The likelihood ratio and ophthalmology: a review of how to critically appraise diagnostic studies      
A likelihood ratio approach to meta-analysis of diagnostic studies      
The likelihood ratio versus the p value in meta-analysis: where is the evidence? Comment on the paper by S. N. Goodman      
Likelihood ratios with confidence: sample size estimation for diagnostic test studies      
Likely country of origin in publications on randomised controlled trials and controlled clinical trials during the last 60 years.      
Likely country of origin of clinical trials used for Cochrane reviews. Poster presentation at the 17th Cochrane Colloquium; 2009 Oct 11-14, Singapore [abstract]      
Limitations are not properly acknowledged in the scientific literature.      
Limitations of clinical trials in acute lung injury and acute respiratory distress syndrome.      
Limitations of meta-analysis from published data in epidemiological research      
Limitations of randomized clinical trials for evaluating emerging operations: the case of lung volume reduction surgery.      
Limitations of using outcomes in the placebo arm of a clinical trial of benign prostatic hyperplasia to quantify those in the community.      
Limited access data sets from studies funded by the National Heart, Lung, and Blood Institute      
Limited search strategies were effective in finding relevant nonrandomized studies.      
The limited spectrum of patients studied in exercise test research. Analyzing the tip of the iceberg      
Limited validity of parental recall on pregnancy, birth, and early childhood at child age 10 years      
Limiting loss to follow-up in a multi-centre randomized trial in orthopaedic surgery [abstract]      
Limiting loss to follow-up in a multicenter randomized trial in orthopedic surgery      
Limits to causal inference based on Mendelian randomization: a comparison with randomized controlled trials.      
Linking pharmacoeconomic analyses to results of a systematic review and meta-analysis      
Linking science and policy through community-based participatory research to study and address health disparities      
List of journals indexed in "Index Medicus"      
Literacy and health literacy as defined in cancer education research: a systematic review      
Literature citations, a clinical-pathological study, with the presentation of three cases      
[Literature cited in a study of Yugoslav biomedical journals]      
A literature network of human genes for high-throughput analysis of gene expression.      
The literature of occupational therapy: a citation analysis study      
Literature review of methods to translate health-related quality of life questionnaires for use in multinational clinical trials.      
Literature review of questionnaires assessing vertigo and dizziness, and their impact on patients' quality of life      
Literature review on horizon scanning for evidence-based decisions by governments [abstract]      
Literature reviews: evolution of a research methodology. [Review]      
Literature search on risk factors for sarcoma: PubMed and Google Scholar may be complementary sources      
Literature search parameters marginally improved the pooled estimate accuracy for ultrasound in detecting deep venous thrombosis.      
Literature search strategy for gamma camera emission tomography using coincidence imaging.      
Literature searches.      
Literature searching and evidence interpretation for assessing health care practices      
Literature searching for clinical and cost-effectiveness studies used in health technology assessment reports carried out for the National Institute for Clinical Excellence appraisal system. [Review]      
Literature searching for health promotion systematic reviews      
Literature searching for randomized controlled trials used in Cochrane reviews: rapid versus exhaustive searches      
Literature searching for social science systematic reviews: consideration of a range of search techniques      
Literature searching for systematic reviews      
Literature searching for systematic reviews and health technology assessments (HTAS): can one rule fit all? [abstract]      
Literature searching in systematic reviews: Is the gold standard tarnished?      
Literature searching strategies of integrative research reviewers      
Literature-searching strategies of integrative research reviewers      
Literature trends in x-ray emission spectrometry in the period 1990-2000 - a review      
Living donor kidney transplant recipients and clinical trials: participation profiles and impact on post-transplant care.      
Local failure and prognostic factors in ductal carcinoma in situ: concentration on recent publications      
Local literature bias in genetic epidemiology: an empirical evaluation of the Chinese literature.      
Local recruitment experience in a study comparing the effectiveness of a low glycaemic index diet with a low calorie healthy eating approach at achieving weight loss and reducing the risk of endometrial cancer in women with polycystic ovary syndrome (PCOS)      
Local sealed envelope randomisation in a multicentre trial: a cautionary tale [abstract]      
Local versus general anaesthesia in carotid surgery. A prospective, randomised study.      
Locally advanced non-small cell lung cancer: do we know the questions? A survey of randomized trials from 1966-1993      
Locating and appraising systematic reviews      
Locating evidence for developing countries: a case study of three public health reviews. Poster presentation at the 19th Cochrane Colloquium; 2011 Oct 19-22; Madrid, Spain [abstract]      
Locating members of a cohort identified retrospectively from limited data in 50-year-old records: successful approaches employed by the Hanford Thyroid Disease Study      
Locating patients lost to follow-up in clinical trials [abstract]      
Locating reports of serious adverse drug reactions [abstract]      
Locating sex-specific evidence on clinical questions in MEDLINE: a search filter for use on OvidSP.      
Locating systematic reviews of diagnostic studies: how five specialist review databases measure up [abstract]      
Locating systematic reviews of healthcare interventions in children: an efficient PubMed search strategy [abstract]      
Locating systematic reviews of test accuracy studies: how five specialist review databases measure up.      
Location and indexing of articles written by podiatric physicians      
Location bias in controlled clinical trials of complementary/alternative therapies.      
Location bias in controlled clinical trials of complementary/alternative therapies      
Location matters in trial quality: African HIV/AIDS trials are more likely to report adequate allocation concealment and random generation compared with North American HIV/AIDS trials [abstract]      
The logic and role of meta-analysis in clinical research      
Logisitical challenges of including a Brazilian site in a clinical trial based in the United States [abstract]      
A logistic model for trend in 2 x 2 x kappa tables with applications to meta-analyses      
Logistic regression in the medical literature: standards for use and reporting, with particular attention to one medical domain      
Logistic regression models in obstetrics and gynecology literature      
Logistic regression models used in medical research are poorly presented      
Logistic regression with incompletely observed categorical covariates--investigating the sensitivity against violation of the missing at random assumption      
Logistics of determining rates of rare side-effects by meta-analysis.      
Logistics of determining rates of rare side effects by meta-analysis [abstract]      
Logistics of double-blinding a randomized trial of intravenous vs. subcutaneous heparin for the treatment of venous thrombosis [abstract]      
A long story made too short: surrogate variables and the communication of HPV vaccine trial results      
Long-term changes in management following n-of-1 trials of stimulants in attention-deficit/hyperactivity disorder.      
Long-term clinical outcome in the Bypass Angioplasty Revascularization Investigation Registry: comparison with the randomized trial. BARI Investigators      
Long term clinical trials: how much information do participants retain from the informed consent process?      
Long-term drug prevention trials.      
Long-term follow-up of clinical trials: is it worth it? [abstract]      
Long-term follow-up of participants in clinical studies.      
Long-term increase in sunscreen use in an Australian community after a skin cancer prevention trial.      
Long-term survival follow-up in international clinical trials [abstract]      
Long-term survival in Hodgkin's disease patients. A comparison of relative survival in patients in trials and those recorded in population-based cancer registries.      
Long-term survival with non-proportional hazards: results from the Dutch Gastric Cancer Trial.      
Longer consent forms for clinical trials compromise patient understanding: so why are they lengthening?      
Longitudinal data analysis (repeated measures) in clinical trials      
A longitudinal study of quality of life in advanced non-small cell lung cancer: Cancer and Leukemia Group B (CALGB) 8931 [see comments]      
Longitudinal trends in academic web links      
Longitudinal trends in the performance of scientific peer reviewers      
A look at ''alternative'' routes to MEDLINE: an evaluation process [abstract]      
A look at the statistical overview (or meta-analysis)      
Look before you quote      
A look inside the black box: a description of the editorial process at three leading biomedical journals [abstract]      
Looking for statistical stability: a new method of evaluating reliability of statistical tests      
Looking for the evidence: is there bias in the publication of individual patient data metaanalyses? [abstract]      
The Lord Gave and the Lord hath taken away (Job 1:21): Lessons learnt from a failed cluster randomised controlled trial of improved fruit and vegetable provision in local convenience stores [abstract]      
Losing participants before the trial ends erodes credibility of findings      
The loss of information when using less complex health-related quality of life instruments: EuroQol versus SF-36: a Swedish population study.      
Loss of patients in clinical trials that measure long-term survival following myocardial infarction      
[The loss of reliability in data extraction from clinical histories: the source of the flaws and the usefulness of training]      
Loss weighting and the human cost of experimentation.      
Lost but not forgotten: patients lost to follow-up in a trauma database.      
Lost in publication: half of all renal practice evidence is published in non-renal journals      
Lost in translation: contributions of editors to the meanings of text      
Lost in translation: the challenges of global communication in medical education publishing      
Lost information? The fate of papers presented at the 40th society for Social Medicine Conference      
Lost science in the Third World      
LOST to follow-up Information in Trials (LOST-IT): a protocol on the potential impact      
LOST to follow-up Information in Trials (LOST-IT): the potential impact on estimates of treatment effect. Oral presentation at the Joint Cochrane and Campbell Colloquium; 2010 Oct 18-22; Keystone, Colorado, USA [abstract]      
Lotka's law and the pattern of scientific productivity in the dental science literature.      
Lottery incentives did not improve response rate to a mailed survey: a randomized controlled trial.      
Low acceptance of an internet-based online questionnaire by young adults.      
Low level laser therapy: a rapid technology assessment through an overview of systematic reviews [abstract]      
Low-molecular-weight heparin versus standard heparin in general and orthopaedic surgery: a meta-analysis.      
Low P-values or narrow confidence intervals: which are more durable?      
Low power, type II errors, and other statistical problems in recent cardiovascular research.      
Low quality of reporting of primary outcomes in Cochrane abstracts. Poster presentation at the 16th Cochrane Colloquium: Evidence in the era of globalisation; 2008 Oct 3-7; Freiburg, Germany [abstract]      
Low rate of sex-specific result reporting in cardiovascular trials.      
Low referral rate for prophylactic implantation of cardioverter- defibrillators in a tertiary care medical center      
Low utilization and wide interhospital variation in investigation of patients after acute myocardial infarction: inadequate resources or insufficient evidence?      
The Lugano statements on controlled clinical trials.      
Lung cancer patients' perceptions of informed consent documents