The n-of-1 randomized controlled trial: clinical usefulness. Our three-year experience.      
N of 1 randomized trials for investigating new drugs      
N of 1 trials are an ineffective method of identifying treatment responders [abstract]      
N-of-1 trials take us beyond the average.      
NAPCRG abstracts 1977-1987: analysis of research designs and methods.      
Narrative based medicine: dialogue and discourse in clinical practice      
Narrative synthesis of qualitative and quantitative evidence: an analysis of tools and techniques [abstract]      
National bias: a comparison of citation practices by health professionals      
National bias in citations in urology journals: parochialism or availability?      
National electronic Library for Health (NeLH)[erratum appears in BMJ 2000 Jan 29;320(7230):296].      
National implementation of exception from informed consent requirements for emergency research (21CFR50.24) process and 1-year experience in the IMMEDIATE trial [abstract]      
The National Institutes of Health and their sponsorship of clinical trials      
The National Library of Medicine's services: initial observations on indexing, interlibrary loan, and reference      
The national, prospective, randomized vitrectomy study for chronic aphakic cystoid macular edema. Progress report and comparison between the control and nonrandomized groups.      
National publication bias?      
National publication bias [letter]      
National sources of vital status information: extent of coverage and possible selectivity in reporting [see comments]      
A national survey of policies on disclosure of conflicts of interest in biomedical research      
Nationwide decline in annual numbers of abdomino-perineal resections: effect of a successful national trial?      
Nationwide trends in the prescription of beta-blockers and angiotensin-converting enzyme inhibitors after myocardial infarction in Denmark, 1995-2002.      
Natural course and placebo response in short-term, placebo-controlled studies in major depression: a meta-analysis of published and non-published studies.      
Natural frequencies help older adults and people with low numeracy to evaluate medical screening tests      
The natural history of peer reviewers: the decay of quality [abstract]      
The natural history of the publication of abstracts [abstract]      
Natural products used as drugs [abstract]      
A naturalistic multicenter study of intramuscular olanzapine in the treatment of acutely agitated manic or schizophrenic patients.      
Navigation and orientation in 3D user interfaces: the impact of navigation aids and landmarks      
Navigation techniques for small-screen devices: an evaluation on maps and web pages      
NCIC CTG MA.17: tolerability of letrozole among ethnic minority women [abstract]      
Nearly half of dental randomized controlled trials published in German are not included in Medline      
Neck pain in MEDLINE and Medical Subject Headings (MeSH): charting the semantic relationship of a MeSH term to article title words [abstract]      
Nedocromil sodium as treatment of exercise-induced bronchoconstriction: a comparison of results from a metaanalysis with individual patient data [abstract]      
Need assessment and priority setting for healthcare technology assessment in Japan [abstract]      
The need for adverse effects reporting standards in oncology clinical trials      
The need for caution in interpreting high quality systematic reviews      
Need for common internal controls when assessing the relative efficacy of pharmacologic agents using a meta-analytic approach: case study of cyclooxygenase 2-selective inhibitors for the treatment of osteoarthritis.      
The need for concrete improvement in abstract quality      
The need for delivery room intubation of thin meconium in the low-risk newborn: a clinical trial.      
The need for digital educational resources in emergency management      
The need for evidence-based management of skin diseases      
Need for high-quality studies in health technology assessments: the case of a systematic review of treatment for retinoblastoma      
Need for large scale randomised evidence about lowering LDL cholesterol in people with diabetes mellitus: MRC/BHF heart protection study and other major trials [editorial].      
Need for selectivity of data collected in clinical trials [abstract]      
The need to collaborate for updating systematic reviews [abstract]      
A need to try everything: patient participation in phase I trials.      
Needed: review articles with more scientific rigor      
The negative effects of personalization on response patterns in mail surveys.      
Negative pressure wound therapy: potential publication bias caused by lack of access to unpublished study results data.      
Negative results and impact factor: a lesson from neonatology.      
Negative results in cancer clinical trials - equivalence or poor accrual?      
Negative results of randomized clinical trials published in the surgical literature: equivalency or error?      
Negative studies      
Negative studies [letter; comment] [see comments]      
A negative trend of biomedical research in Libya: a bibliometric study      
Neglected external validity in reports of randomized trials: the example of hip and knee osteoarthritis      
Neoadjuvant therapy with paclitaxel followed by 5-fluorouracil, epirubicin, and cyclophosphamide chemotherapy and concurrent trastuzumab in human epidermal growth factor receptor 2-positive operable breast cancer: an update of the initial randomized study population and data of additional patients treated with the same regimen.      
Neonatal research and the validity of informed consent obtained in the perinatal period.      
Neonatal research: the parental perspective.      
Neonatal systematic reviews and their effect on clinical practice in NSW ( Australia) [abstract]      
Neonatal thrombosis: are we doing the right studies?      
Nephroblastoma: treatment during 1970-3 and the effect on survival of inclusion in the first MRC trial.      
The net effect of alternative allocation ratios on recruitment time and trial cost.      
NETT coordinators: researchers, caregivers, or both?      
Network meta-analysis for indirect treatment comparisons      
A network of investigator networks in human genome epidemiology.      
Networked information and clinical decision making: the experience of Birmingham Heartlands and Solihull National Health Service Trust (Teaching).      
Networking consumer health information: bringing the patient into the medical information loop      
Neurocognitive indicators predict results of an informed-consent quiz among substance-dependent treatment seekers entering a randomized clinical trial      
Neurological research in Europe, as assessed with a four-year overview of neurological science international journals. [Review]      
Neuromuscular contributions in eight anaesthesia journals      
Neuroprosthesis consumers' forum: consumer priorities for research directions.      
Neuropsychological outcomes in randomized controlled trials of antiepileptic drugs: a systematic review of methodology and reporting standards      
Neurosurgical publications in European journals [see comments]      
New and emerging methods of research synthesis: are they given sufficient attention? Poster presentation at the 19th Cochrane Colloquium; 2011 Oct 19-22; Madrid, Spain [abstract]      
A new approach to combining clinical relevance and statistical significance for evaluation of quality of life changes in the individual patient      
A new approach to outliers in meta-analysis.      
A new Bayesian approach to fixed effects models for combining 2x2 tables      
A new challenge in clinical research in childhood ALL: the prospective meta-analysis strategy for intergroup collaboration      
New concepts in indexing      
A new design for randomized clinical trials      
New developments in the conduct and management of multi-center trials: an international review of clinical trial units      
New dimension in British bibliographical control - a review article      
"New drugs: kids come first": children should be included in trials of new biological treatments.      
A new endpoint for the assessment of adjuvant therapy in postmenopausal women with operable breast cancer      
New equities of information in an electronic age.      
A new format for Plain Language Summaries; does it improve understanding, and is it useful and preferable? Oral presentation at the 17th Cochrane Colloquium; 2009 Oct 11-14, Singapore [abstract]      
A new graphic for quality adjusted life years (Q-TWiST) survival analysis: the Q-TWiST plot.      
New informetric aspects of the Internet: some reflections - many problems      
New meta-analysis of treatment trials of hypertension: improving the estimate of therapeutic benefit      
A new method of estimation of interobserver variation and its application to the radiological assessment of osteoarthrosis in hip joints [see comments]      
A new method of increasing mail survey responses: contributions to charity.      
New methods for integrating qualitative and quantitative research in a systematic review: an example from public health [abstract]      
A new population-enrichment strategy to improve efficiency of placebo-controlled clinical trials of antidepressant drugs      
A new preference-based analysis for randomized trials can estimate treatment acceptability and effect in compliant patients      
New program for indexing at the National Library of Medicine      
New search strategies optimize MEDLINE retrieval of sound studies on treatment or prevention of health disorders. A review of: Haynes, R. Brian, K. Ann McKibbon, Nancy L. Wilczynski, Stephen D. Walter, and Stephen R. Were. "Optimal search strategies for retrieving scientifically strong studies of treatment from Medline: analytical survey". BMJ 220.7501 (21 May 2005):1179.      
A new system for grading recommendations in evidence based guidelines.      
New tools for critical appraisal in Spanish language [abstract]      
["New wonder pill!"--what do Norwegian newspapers write]. [Norwegian]      
New Zealand trends in animal behaviour research      
The Newcastle-Ottawa Scale (NOS) for assessing the quality of nonrandomised studies in meta-analyses [abstract]      
A newly established network for Japanese healthcare professionals for translating the Cochrane Database of Systematic Review abstracts. Poster presentation at the Joint Cochrane and Campbell Colloquium; 2010 Oct 18-22; Keystone, Colorado, USA [abstract]      
[News about cancer in the press]      
News and social media: windows into community perspectives on disinvestment      
News from the International Committee of Medical Journal Editors      
News media coverage of screening mammography for women in their 40s and tamoxifen for primary prevention of breast cancer      
[Newspaper and magazine articles dealing with anesthesia-related accidents including dental-anesthesia: an analysis of the past 20 years (1981-2000)]      
Newspaper reporting of screening mammography [comment]      
Next stop, don't block the doors: opening up access to clinical trials results.      
NHS Direct Online: its users and their concerns.      
NIA-funded Alzheimer centers are more efficient than commercial clinical recruitment sites for conducting secondary prevention trials of dementia      
The NICE Interventional Procedures Programme: how much evidence is adequate? [abstract]      
NICE technology appraisal topic selection: the 'new versus old' debate and the presumed pharmaceutical bias [abstract]      
NIDDK data repository: a central collection of clinical trial data.      
Nifedipine and coronary insufficiency: reasons for controversy      
NIH clinical trials and publication bias      
A nineteen-year review of nurse-authored abstracts presented to the American Burn Association. Implications for the future.      
Nitrous oxide for colonoscopy: a randomized controlled study.      
NLM's practices for handling errata and retractions      
NNT - a misleading measure of health benefit? [abstract]      
No consensus exists on search reporting methods for systematic reviews.      
No decline in breast cancer incidence trends following reduced use of hormone replacement therapy in Sweden [abstract]      
No evidence of bias in the process of publication of diagnostic accuracy studies in stroke submitted as abstracts.      
No evidence of sexism in peer review.      
No gender differences in placebo responses of patients with major depressive disorder.      
No improvement in studies reporting the diagnostic accuracy of B-type natriuretic peptide      
No improvement - still less than half of the Cochrane reviews are up to date [abstract]      
"No language restrictions" in database searches: what does this really mean?      
No role for quality scores in systematic reviews of diagnostic accuracy studies.      
No short-cut in assessing trial quality: a case study.      
No study left behind: a network meta-analysis in non-small-cell lung cancer demonstrating the importance of considering all relevant data      
Non-biomedical sources for systematic reviews of pharmaceutical policy      
Non-Cochrane vs. Cochrane reviews were twice as likely to have positive conclusion statements: cross-sectional study      
Non-compliance and related phenomena.      
Non-English reports of medical research [letter]      
Non-English reports of medical research [letter] [reply]      
Non-enrolment of ovarian cancer patients in clinical trials: reasons and background.      
Non-entry of eligible patients into the Australasian Laparoscopic Colon Cancer Study.      
Non-indexed medical journals in the Web: new perspectives in the medical literature      
Non-inferiority trials: design concepts and issues - the encounters of academic consultants in statistics.      
A non-parametric procedure for evaluating treatment effect in the meta-analysis of survival data.      
Non-parametric significance tests of retrieval performance comparisons      
Non-random missing data in longitudinal quality of life research: an application and comparison of three imputation strategies [abstract]      
Non-randomised patients in a cholecystectomy trial: characteristics, procedures, and outcomes.      
Non-randomised studies in reviews of effective professional practice and the organisation of health care: do authors consider them and do they find them? Poster presentation at the 19th Cochrane Colloquium; 2011 Oct 19-22; Madrid, Spain [abstract]      
Non-randomized study designs in US Evidence Practice Center reports [abstract]      
Non-respondents in a post-myocardial infarction trial: characteristics and reasons for refusal.      
Non-surgical spinal decompression therapy: does the scientific literature support efficacy claims made in the advertising media?      
Nonadherence to adjuvant tamoxifen therapy in women with primary breast cancer      
Nonattendance in the Stockholm mammography screening trial: relative mortality and reasons for nonattendance.      
Noncompliance in lifestyle intervention studies: the instrumental variable method provides insight into the bias      
Noncoverage bias in household landline telephone surveys, BRFSS 2008 [abstract]      
Nonevaluable patients in clinical cancer research.      
Noninvasive carotid artery testing. A meta-analytic review      
Nonlinear behavior of search strategies for identifying relevant orthodontic articles      
Nonoperative treatments for sciatica: a pilot study for a randomized clinical trial.      
Nonparametric and semiparametric group sequential methods for comparing accuracy of diagnostic tests      
Nonparametric estimation of heterogeneity variance for the standardised difference used in meta-analysis      
Nonparametric sequential tests against ordered alternatives in multiple-armed clinical trials      
Nonparticipation as a determinant of adverse health outcomes in a field trial of oral cholera vaccines.      
Nonrandomized quality improvement intervention trials might overstate the strength of causal inference of their findings      
Nonresponse bias in a mail survey of physicians      
Nonresponse bias in a national study of dentists' infection control practices and attitudes related to HIV.      
Nonresponse to a population-based postdisaster postal questionnaire study      
Normalisation process theory: a framework for developing, evaluating and implementing complex interventions      
The Norsjo-Cooperstown healthy heart project: a case study combining data from different studies without the use of meta-analysis      
Not only randomized controlled trials, but also case series should be considered in systematic reviews of rapidly developing technologies      
A note on estimating treatment effect for time-to-event data in a literature-based meta-analysis      
A note on fatality in serum hepatitis      
A note on graphical presentation of estimated odds ratios from several clinical trials      
A note on Harold S. Diehl, randomization, and clinical trials      
Note on large, simple, widely representative trials [letter; comment]      
A note on pooling Kaplan-Meier estimates      
A note on the response to a mailed questionnaire.      
A note on Zelen randomization: attitudes of parents participating in a neonatal clinical trial [letter]      
A note on Zelen randomization: attitudes of parents participating in a neonatal clinical trial [reply]      
Notes on the MLE correlation-coefficient in meta-analysis      
Novel approach to meta-analyses combining observational studies that report adjusted risk ratios with different dose categories [abstract]      
A novel approach to mixed-treatment meta-analyses [abstract]      
A novel diagram and complement to the CONSORT chart for presenting multimodal clinical trials      
Novel Internet-based tool for correcting apparent sensitivity and specificity of diagnostic tests to adjust for referral (verification) bias.      
A novel method to improve adjustment for publication biases by borrowing strength across similar interventions [abstract]      
Novel methods to deal with publication biases: secondary analysis of antidepressant trials in the FDA trial registry database and related journal publications      
A novel sham moxibustion device: a randomized, placebo-controlled trial.      
Novel strategies implemented to ensure high participant retention rates in a community based HIV prevention effectiveness trial in South Africa and Zimbabwe      
A novel use for the word "trend" in the clinical trial literature. [Review]      
The novel use of site selection surveys to improve sub-optimal recruitment [abstract]      
Now that we have the Utstein style, are we using it?      
Now you see it, now you don't: a comparison of traditional versus random-effects regression models in the analysis of longitudinal follow-up data from a clinical trial.      
The null hypothesis significance test in health sciences research (1995-2006): statistical analysis and interpretation      
The Null Hypothesis Significance Test in health sciences research (1995-2006): statistical analysis and interpretation [abstract]      
Number and size of randomized trials reported in general health care journals from 1948 to 1997      
The number, content, and quality of randomized controlled trials in the prevention and care of injuries      
The number, coverage and quality of diagnostic test accuracy studies in Nephrology. Oral presentation at the Joint Cochrane and Campbell Colloquium; 2010 Oct 18-22; Keystone, Colorado, USA [abstract]      
The number needed to read: are capture-recapture techniques feasible in searching literature for systematic reviews? Poster presentation at the 17th Cochrane Colloquium; 2009 Oct 11-14, Singapore [abstract]      
The number needed to retrieve: a practically useful measure of information retrieval?      
The 'number needed to sample' in primary care research. Comparison of two primary care sampling frames for chronic back pain.      
Number needed to screen: development of a statistic for disease screening      
The number needed to treat: a clinically useful measure of treatment effect. [erratum appears in BMJ 1995 Apr 22;310(6986):1056.]      
Number needed to treat and number needed to harm are not the best way to report and assess the results of randomised clinical trials      
Number-needed-to-treat and placebo-controlled trials      
Number needed to treat: caveat emptor      
Number needed to treat: easily understood and intuitively meaningful? Theoretical considerations and a randomized trial.      
Number needed to treat estimates incorporating effects over the entire range of clinical outcomes: novel derivation method and application to thrombolytic therapy for acute stroke.[erratum appears in Arch Neurol. 2004 Oct;61(10):1599].      
Number-needed-to-treat: misleading, misunderstood, misused? [abstract]      
Number needed to treat (NNT): implication in rheumatology clinical practice.      
[Number needed to treat (NNT) - misleading, misunderstood, misused?]      
Number needed to treat: properties and problems      
Number of 24-hour diet recalls needed to estimate energy intake [abstract]      
Number of published systematic reviews and global burden of disease: database analysis.      
The number, quality, and coverage of randomized controlled trials in nephrology.      
Numbering questionnaires had no impact on the response rate and only a slight influence on the response content of a patient safety culture survey: a randomized trial      
Numbers are better than words. Verbal specifications of frequency have no place in medicine      
[Numbers needed for treatment and their respective confidence intervals: useful tools to assess clinical significance and uncertainty associated with medical interventions] [Review] [22 refs] [Portuguese]      
Numbers needed to treat derived from meta-analyses are misleading [abstract]      
Numbers needed to treat derived from meta-analyses - sometimes informative, usually misleading      
Numeric, verbal, and visual formats of conveying health risks: suggested best practices and future recommendations.      
Nurse or physician: whose recommendation influences the decision to take genetic tests more?      
Nurse related systematic reviews in The Cochrane Library. Poster presentation at the Joint Cochrane and Campbell Colloquium; 2010 Oct 18-22; Keystone, Colorado, USA [abstract]      
Nurses' attitudes toward clinical trials at a comprehensive cancer center      
Nurses' experience of guideline implementation: a focus group study [abstract]      
Nurses' perceptions of ethical issues in the care of older people      
Nurses' use of computer databases to identify evidence for practice--a cross-sectional questionnaire survey in a UK hospital      
Nurses' use of online clinical evidence.      
Nurses' use of the Internet in clinical ward settings.      
The nursing contribution to qualitative research in palliative care 1990-1999: a critical evaluation. [Review]      
Nursing practice, knowledge, attitudes and perceived barriers to evidence-based practice at an academic medical center      
A nursing qualitative systematic review required MEDLINE and CINAHL for study identification.      
Nursing research and priorities in Africa, Asia, and Europe.      
Nursing research in Spain: bibliometrics of references of research papers in the decade 1985-1994.      
Nursing research information: are nurse educators and practitioners seeking it out?      
Nursing research priorities for the care of the client with a gastrointestinal disorder: a Delphi survey.      
Nursing research priorities of the National Black Nurses Association.      
[Nutrition and pressure ulcers among old people]      
Nutrition Society Symposium on 'End points in clinical nutrition trials': death, morbidity and economics are the only end points for trials.      
Nutritional medicine on the Internet