Published in Int J Epidemiol on August 30, 2006
Sample size calculations for cluster randomised controlled trials with a fixed number of clusters. BMC Med Res Methodol (2011) 2.47
Can differences in obstetric outcomes be explained by differences in the care provided? The MFMU Network APEX study. Am J Obstet Gynecol (2014) 1.80
Epidemiological methods in diarrhoea studies--an update. Int J Epidemiol (2011) 1.56
A new dependence parameter approach to improve the design of cluster randomized trials with binary outcomes. Clin Trials (2011) 1.55
Focus on function: a cluster, randomized controlled trial comparing child- versus context-focused intervention for young children with cerebral palsy. Dev Med Child Neurol (2011) 1.52
Sample size calculation for a stepped wedge trial. Trials (2015) 1.38
The QICKD study protocol: a cluster randomised trial to compare quality improvement interventions to lower systolic BP in chronic kidney disease (CKD) in primary care. Implement Sci (2009) 1.22
The OPERA trial: protocol for a randomised trial of an exercise intervention for older people in residential and nursing accommodation. Trials (2011) 1.21
Effects of malaria volunteer training on coverage and timeliness of diagnosis: a cluster randomized controlled trial in Myanmar. Malar J (2012) 1.15
Best (but oft-forgotten) practices: designing, analyzing, and reporting cluster randomized controlled trials. Am J Clin Nutr (2015) 1.12
Developing appropriate methods for cost-effectiveness analysis of cluster randomized trials. Med Decis Making (2011) 1.10
Clustering in surgical trials--database of intracluster correlations. Trials (2012) 1.06
Financial incentives to improve adherence to anti-psychotic maintenance medication in non-adherent patients - a cluster randomised controlled trial (FIAT). BMC Psychiatry (2009) 1.06
Multilevel factorial experiments for developing behavioral interventions: power, sample size, and resource considerations. Psychol Methods (2012) 1.04
Design effect in multicenter studies: gain or loss of power? BMC Med Res Methodol (2009) 1.03
Study protocol for the 10 Top Tips (10TT) trial: randomised controlled trial of habit-based advice for weight control in general practice. BMC Public Health (2012) 1.01
Cluster randomized trials utilizing primary care electronic health records: methodological issues in design, conduct, and analysis (eCRT Study). Trials (2014) 1.00
Small sample performance of bias-corrected sandwich estimators for cluster-randomized trials with binary outcomes. Stat Med (2014) 0.98
Cohort Multiple Randomised Controlled Trials (cmRCT) design: efficient but biased? A simulation study to evaluate the feasibility of the Cluster cmRCT design. BMC Med Res Methodol (2016) 0.96
The implementation of the serial trial intervention for pain and challenging behaviour in advanced dementia patients (STA OP!): a clustered randomized controlled trial. BMC Geriatr (2011) 0.95
Reducing unnecessary hospital days to improve quality of care through physician accountability: a cluster randomised trial. BMC Health Serv Res (2013) 0.92
Sample size considerations for GEE analyses of three-level cluster randomized trials. Biometrics (2010) 0.91
Nonparametric Sample Size Estimation for Sensitivity and Specificity with Multiple Observations per Subject. Drug Inf J (2010) 0.88
Methods for sample size determination in cluster randomized trials. Int J Epidemiol (2015) 0.85
An educational intervention to reduce the use of potentially inappropriate medications among older adults (EMPOWER study): protocol for a cluster randomized trial. Trials (2013) 0.83
Evaluating Public Health Interventions: 2. Stepping Up to Routine Public Health Evaluation With the Stepped Wedge Design. Am J Public Health (2016) 0.83
Systematic review finds major deficiencies in sample size methodology and reporting for stepped-wedge cluster randomised trials. BMJ Open (2016) 0.83
Rationale, design and methods of the Study of Work and Pain (SWAP): a cluster randomised controlled trial testing the addition of a vocational advice service to best current primary care for patients with musculoskeletal pain (ISRCTN 52269669). BMC Musculoskelet Disord (2014) 0.82
Intraclass correlation coefficients for cluster randomized trials in care pathways and usual care: hospital treatment for heart failure. BMC Health Serv Res (2014) 0.82
The clustering effects of surfaces within the tooth and teeth within individuals. J Dent Res (2014) 0.81
A cluster-randomised controlled trial to assess the effectiveness and cost-effectiveness of a childhood obesity prevention programme delivered through schools, targeting 6-7 year old children: the WAVES study protocol. BMC Public Health (2015) 0.80
Neighborhood clustering of non-communicable diseases: results from a community-based study in Northern Tanzania. BMC Public Health (2016) 0.79
Changing cluster composition in cluster randomised controlled trials: design and analysis considerations. Trials (2014) 0.79
Evidence-based care of older people with suspected cognitive impairment in general practice: protocol for the IRIS cluster randomised trial. Implement Sci (2013) 0.79
Quality and Reporting of Cluster Randomized Controlled Trials Evaluating Occupational Therapy Interventions: A Systematic Review. OTJR (Thorofare N J) (2015) 0.78
The effect of cluster size variability on statistical power in cluster-randomized trials. PLoS One (2015) 0.78
Effectiveness of continence promotion for older women via community organisations: a cluster randomised trial. BMJ Open (2013) 0.77
A stepped wedge, cluster controlled trial of an intervention to improve safety and quality on medical wards: the HEADS-UP study protocol. BMJ Open (2015) 0.76
A brief intervention for weight control based on habit-formation theory delivered through primary care: Results from a randomised controlled trial. Int J Obes (Lond) (2016) 0.76
The ThRombolysis in UnconTrolled Hypertension (TRUTH) protocol: an observational study on treatment strategy of elevated blood pressure in stroke patients eligible for IVT. BMC Neurol (2015) 0.75
Why Small is Too Small a Term: Prevention Science for Health Disparities, Culturally Distinct Groups, and Community-Level Intervention. Prev Sci (2015) 0.75
An imbalance in cluster sizes does not lead to notable loss of power in cross-sectional, stepped-wedge cluster randomised trials with a continuous outcome. Trials (2017) 0.75
The Role of Drinking Beliefs to Explain Ethnic Variation in Drinking Practices Among U.S. College Students. Subst Use Misuse (2013) 0.75
Design and analysis of trials with a partially nested design and a binary outcome measure. Stat Med (2015) 0.75
Linking quality of healthcare and health-related quality of life of patients with type 2 diabetes: an evaluative study in Mexican family practice. Int J Qual Health Care (2013) 0.75
Effectiveness of a live oral human rotavirus vaccine after programmatic introduction in Bangladesh: A cluster-randomized trial. PLoS Med (2017) 0.75
The SENSE Study (Sleep and Education: learning New Skills Early): a community cognitive-behavioural therapy and mindfulness-based sleep intervention to prevent depression and improve cardiac health in adolescence. BMC Psychol (2015) 0.75
Calculating Power by Bootstrap, with an Application to Cluster-Randomized Trials. EGEMS (Wash DC) (2017) 0.75
When research meets reality-lessons learned from a pragmatic multisite group-randomized clinical trial on psychosocial interventions in the psychiatric and addiction field. Subst Abuse (2012) 0.75
A randomized controlled trial of a faith-placed, lay health advisor delivered smoking cessation intervention for rural residents. Prev Med Rep (2016) 0.75
Continence Across Continents To Upend Stigma and Dependency (CACTUS-D): study protocol for a cluster randomized controlled trial. Trials (2015) 0.75
Effect of an Education Programme for South Asians with Asthma and Their Clinicians: A Cluster Randomised Controlled Trial (OEDIPUS). PLoS One (2016) 0.75
Evaluation of two prevention programs 'Early Steps' and 'Faustlos' in daycare centers with children at risk: the study protocol of a cluster randomized controlled trial. Trials (2013) 0.75
The clinical and cost-effectiveness of stratified care for patients with sciatica: the SCOPiC randomised controlled trial protocol (ISRCTN75449581). BMC Musculoskelet Disord (2017) 0.75
Clinical and cost effectiveness of staff training in Positive Behaviour Support (PBS) for treating challenging behaviour in adults with intellectual disability: a cluster randomised controlled trial. BMC Psychiatry (2014) 0.75
Nurse-led group consultation intervention reduces depressive symptoms in men with localised prostate cancer: a cluster randomised controlled trial. BMC Cancer (2016) 0.75
The effectiveness bundling of zinc with Oral Rehydration Salts (ORS) for improving adherence to acute watery diarrhea treatment in Ethiopia: cluster randomised controlled trial. BMC Public Health (2016) 0.75
Effectiveness of a lumbopelvic monitor and feedback device to change postural behaviour: a protocol for the ELF cluster randomised controlled trial. BMJ Open (2017) 0.75
The factors that influence the oral health-related quality of life in 12-year-old children: baseline study of a longitudinal research. Health Qual Life Outcomes (2017) 0.75
Maximin optimal designs for cluster randomized trials. Biometrics (2017) 0.75
Infection control intervention on meticillin resistant Staphylococcus aureus transmission in residential care homes for the elderly. J Infect Prev (2014) 0.75
Multimorbidity as an important issue among women: results of a gender difference investigation in a large population-based cross-sectional study in West Asia. BMJ Open (2017) 0.75
No surgical innovation without evaluation: the IDEAL recommendations. Lancet (2009) 5.57
Genetic Loci associated with C-reactive protein levels and risk of coronary heart disease. JAMA (2009) 5.32
Lessons for cluster randomized trials in the twenty-first century: a systematic review of trials in primary care. Clin Trials (2004) 4.19
Antidepressants and suicide: what is the balance of benefit and harm. BMJ (2004) 3.80
Antidepressant treatment and the risk of fatal and non-fatal self harm in first episode depression: nested case-control study. BMJ (2005) 3.09
Evaluation and stages of surgical innovations. Lancet (2009) 3.04
Challenges in evaluating surgical innovation. Lancet (2009) 2.86
Antiplatelets vs anticoagulation for dissection: CADISS nonrandomized arm and meta-analysis. Neurology (2012) 2.61
Changes in physiological, functional and structural markers of cystic fibrosis lung disease with treatment of a pulmonary exacerbation. Thorax (2013) 2.42
Emergency department treatments and physiotherapy for acute whiplash: a pragmatic, two-step, randomised controlled trial. Lancet (2012) 2.30
Effectiveness of financial incentives to improve adherence to maintenance treatment with antipsychotics: cluster randomised controlled trial. BMJ (2013) 2.28
Variations in primary open-angle glaucoma prevalence by age, gender, and race: a Bayesian meta-analysis. Invest Ophthalmol Vis Sci (2006) 2.26
Internal and external validity of cluster randomised trials: systematic review of recent trials. BMJ (2008) 1.90
Smooth muscle cholinergic denervation hypersensitivity in diverticular disease. Lancet (2003) 1.90
Advice to use topical or oral ibuprofen for chronic knee pain in older people: randomised controlled trial and patient preference study. BMJ (2007) 1.71
Informed patient consent to participation in cluster randomized trials: an empirical exploration of trials in primary care. Clin Trials (2005) 1.70
The interaction of vasopressin and corticosteroids in septic shock: a pilot randomized controlled trial. Crit Care Med (2014) 1.69
High prevalence but low impact of data extraction and reporting errors were found in Cochrane systematic reviews. J Clin Epidemiol (2005) 1.60
Kisspeptin-54 triggers egg maturation in women undergoing in vitro fertilization. J Clin Invest (2014) 1.58
Cardiovascular MRI in clinical trials: expanded applications through novel surrogate endpoints. Heart (2011) 1.52
Bias in identifying and recruiting participants in cluster randomised trials: what can be done? BMJ (2009) 1.44
Is Mycoplasma genitalium in women the "New Chlamydia?" A community-based prospective cohort study. Clin Infect Dis (2010) 1.43
A lesson learnt: the importance of modelling in randomized controlled trials for complex interventions in primary care. Fam Pract (2005) 1.41
Children's factual and delusional memories of intensive care. Am J Respir Crit Care Med (2008) 1.30
Is there a role for nurse-led blood pressure management in primary care? Fam Pract (2003) 1.27
Where errors occur in the preparation and administration of intravenous medicines: a systematic review and Bayesian analysis. Qual Saf Health Care (2010) 1.27
Lessons learned from recruiting young female students to a randomised controlled trial of chlamydia screening. Fam Pract (2006) 1.21
Stroke patients' perceptions of home blood pressure monitoring: a qualitative study. Br J Gen Pract (2011) 1.16
A systematic review of chronic fatigue, its syndromes and ethnicity: prevalence, severity, co-morbidity and coping. Int J Epidemiol (2009) 1.15
Prevalence of Mycoplasma genitalium in early pregnancy and relationship between its presence and pregnancy outcome. BJOG (2004) 1.15
Detection of Chlamydia trachomatis infection in early pregnancy using self-administered vaginal swabs and first pass urines: a cross-sectional community-based survey. Br J Gen Pract (2002) 1.14
Financial incentives to improve adherence to anti-psychotic maintenance medication in non-adherent patients - a cluster randomised controlled trial (FIAT). BMC Psychiatry (2009) 1.06
Bacterial vaginosis and preterm birth: a prospective community-based cohort study. Br J Gen Pract (2004) 1.05
Risk factors for fractures and falls in older women with type 2 diabetes mellitus. Calcif Tissue Int (2008) 1.02
Randomised controlled trial of a complex intervention by primary care nurses to increase walking in patients aged 60-74 years: protocol of the PACE-Lift (Pedometer Accelerometer Consultation Evaluation - Lift) trial. BMC Public Health (2013) 1.02
Respiratory syncytial virus bronchiolitis: disease severity, interleukin-8, and virus genotype. Pediatr Pulmonol (2002) 1.01
Community-based trial of screening for Chlamydia trachomatis to prevent pelvic inflammatory disease: the POPI (prevention of pelvic infection) trial. Trials (2008) 1.00
Which older people decline participation in a primary care trial of physical activity and why: insights from a mixed methods approach. BMC Geriatr (2014) 1.00
Oral protein energy supplements for children with cystic fibrosis: CALICO multicentre randomised controlled trial. BMJ (2006) 0.98
What is the cost of pelvic inflammatory disease and how much could be prevented by screening for chlamydia trachomatis? Cost analysis of the Prevention of Pelvic Infection (POPI) trial. Sex Transm Infect (2011) 0.98
Timing of progression from Chlamydia trachomatis infection to pelvic inflammatory disease: a mathematical modelling study. BMC Infect Dis (2012) 0.97
Recruitment of young women to a trial of chlamydia screening - as easy as it sounds? Trials (2007) 0.95
Is it exposure to cigarette smoke or to smokers which increases the risk of meningococcal disease in teenagers? Int J Epidemiol (2006) 0.95
Cytokines in severe respiratory syncytial virus bronchiolitis. Pediatr Pulmonol (2002) 0.94
Chronic fatigue syndrome in an ethnically diverse population: the influence of psychosocial adversity and physical inactivity. BMC Med (2011) 0.94
Managing Injuries of the Neck Trial (MINT): design of a randomised controlled trial of treatments for whiplash associated disorders. BMC Musculoskelet Disord (2007) 0.92
A systematic review of pain drawing literature: should pain drawings be used for psychologic screening? Clin J Pain (2006) 0.91
Systematic reviews and lifelong diseases. BMJ (2002) 0.90
Pattern of culture-proven neonatal sepsis in a district general hospital in the United Kingdom. Infect Control Hosp Epidemiol (2004) 0.89
Numbers are not the whole story: a qualitative exploration of barriers and facilitators to increased physical activity in a primary care based walking intervention. BMC Public Health (2014) 0.89
Adjusting for publication bias: modelling the selection process. J Eval Clin Pract (2004) 0.87
Associations between inflammatory and immune response genes and adverse respiratory outcomes following exposure to outdoor air pollution: a HuGE systematic review. Am J Epidemiol (2013) 0.87
Using disease registries for pharmacoepidemiological research: a case study of data from a cystic fibrosis registry. Pharmacoepidemiol Drug Saf (2003) 0.86
Supplementation of iron in pulmonary hypertension: Rationale and design of a phase II clinical trial in idiopathic pulmonary arterial hypertension. Pulm Circ (2013) 0.85
TOIB Study. Are topical or oral ibuprofen equally effective for the treatment of chronic knee pain presenting in primary care: a randomised controlled trial with patient preference study. [ISRCTN79353052]. BMC Musculoskelet Disord (2005) 0.85
Diet and colorectal cancer: an investigation of the lectin/galactose hypothesis. Gastroenterology (2002) 0.84
Balancing benefit and risk of medicines: a systematic review and classification of available methodologies. Pharmacoepidemiol Drug Saf (2014) 0.84
An efficacy and mechanism evaluation study of Levosimendan for the Prevention of Acute oRgan Dysfunction in Sepsis (LeoPARDS): protocol for a randomized controlled trial. Trials (2014) 0.82
For debate: is the evidence for the efficacy of cholinesterase inhibitors in the symptomatic treatment of Alzheimer's disease convincing or not? Int Psychogeriatr (2008) 0.82
Suicidal behaviour and SSRIs: updated meta-analysis. BMJ (2006) 0.81
Use of an online questionnaire for follow-up of young female students recruited to a randomised controlled trial of chlamydia screening. J Epidemiol Community Health (2010) 0.81
Pharmacokinetics, adverse effects and tolerability of a novel analogue of human pancreatic polypeptide, PP 1420. Br J Clin Pharmacol (2012) 0.81
The use of routinely collected patient data for research: a critical review. Health (London) (2011) 0.80
Oral steroids for long-term use in cystic fibrosis. Cochrane Database Syst Rev (2015) 0.79
Benefit-risk assessment in a post-market setting: a case study integrating real-life experience into benefit-risk methodology. Pharmacoepidemiol Drug Saf (2014) 0.78
Are stroke patients' reports of home blood pressure readings reliable? Cross-sectional study. Fam Pract (2010) 0.78
Prokinetics prescribing in paediatrics: evidence on cisapride, domperidone, and metoclopramide. J Pediatr Gastroenterol Nutr (2015) 0.77
Ursodeoxycholic acid for cystic fibrosis-related liver disease. Cochrane Database Syst Rev (2014) 0.77
Republished paper: Where errors occur in the preparation and administration of intravenous medicines: a systematic review and Bayesian analysis. Postgrad Med J (2010) 0.77
Ursodeoxycholic acid for cystic fibrosis-related liver disease. Cochrane Database Syst Rev (2012) 0.77
Oral steroids for long-term use in cystic fibrosis. Cochrane Database Syst Rev (2011) 0.77
Oral steroids for long-term use in cystic fibrosis. Cochrane Database Syst Rev (2013) 0.76
Meeting report: 1st international functional metagenomics workshop may 7-8, 2012, st. Jacobs, ontario, Canada. Stand Genomic Sci (2013) 0.76
Dietetic management of people with cystic fibrosis. J Am Diet Assoc (2008) 0.75
Nurse-led management of hypertension. Br J Gen Pract (2005) 0.75
Use of evidence in hypertension guidelines. Br J Gen Pract (2009) 0.75
Supporting self-care in general practice. Br J Gen Pract (2007) 0.75
GP's attitudes to hypertension guidelines. Br J Gen Pract (2008) 0.75
Incidence of pelvic inflammatory disease in untreated women infected with Chlamydia trachomatis. Int J STD AIDS (2008) 0.75
Thrombosis prevention trial: compliance with warfarin treatment and investigation of a retained effect. Arch Intern Med (2003) 0.75
Reporting of health problems and pain by adults with an intellectual disability and by their carers. J Appl Res Intellect Disabil (2011) 0.75
Ursodeoxycholic acid for cystic fibrosis-related liver disease. Cochrane Database Syst Rev (2017) 0.75
Lack of effect of influenza immunisation on anticoagulant control in patients on long-term warfarin. Pharmacoepidemiol Drug Saf (2007) 0.75
Cumulative flying time and risk of venous thromboembolism. Br J Haematol (2011) 0.75