| | Other Issues: previous | next | latest | archiveCorrespondence The use of interim data and Data Monitoring Committee recommendations in randomized controlled trial reports: frequency, implications and potential sources of bias Puvan Tharmanathan, Melanie Calvert, John Hampton, and Nick Freemantle PMCID: PMC2279143 Abstracts in high profile journals often fail to report harm Enrique Bernal-Delgado and Elliot S Fisher PMCID: PMC2329663 Graphical presentation of diagnostic information Penny F Whiting, Jonathan AC Sterne, Marie E Westwood, Lucas M Bachmann, Roger Harbord, Matthias Egger, and Jonathan J Deeks PMCID: PMC2394529 Language and rigour in qualitative research: Problems and principles in analyzing data collected in Mandarin Helen J Smith, Jing Chen, and Xiaoyun Liu PMCID: PMC2474845 Experiences of a long-term randomized controlled prevention trial in a maiden environment: Estonian Postmenopausal Hormone Therapy trial Sirpa-Liisa Hovi, Piret Veerus, Mati Rahu, and Elina Hemminki PMCID: PMC2529341 Reducing bias through directed acyclic graphs Ian Shrier and Robert W Platt PMCID: PMC2601045 Software Balance algorithm for cluster randomized trials Ben R Carter and Kerenza Hood PMCID: PMC2588445 Technical Advances Estimates of adherence and error analysis of physical activity data collected via accelerometry in a large study of free-living adults David R Paul, Matthew Kramer, Kim S Stote, Karen E Spears, Alanna J Moshfegh, David J Baer, and William V Rumpler PMCID: PMC2440761 Simple estimators of the intensity of seasonal occurrence M Alan Brookhart and Kenneth J Rothman PMCID: PMC2596789 Research Articles An administrative data merging solution for dealing with missing data in a clinical registry: adaptation from ICD-9 to ICD-10 Danielle A Southern, Colleen M Norris, Hude Quan, Fiona M Shrive, P Diane Galbraith, Karin Humphries, Min Gao, Merril L Knudtson, William A Ghali, and the APPROACH Investigators PMCID: PMC2244639 Towards socially inclusive research: An evaluation of telephone questionnaire administration in a multilingual population Elizabeth Dormandy, Katrina Brown, Erin P Reid, Theresa M Marteau, and SHIFT research team PMCID: PMC2270862 Negative pressure wound therapy: Potential publication bias caused by lack of access to unpublished study results data Frank Peinemann, Natalie McGauran, Stefan Sauerland, and Stefan Lange PMCID: PMC2291064 Examining assumptions regarding valid electronic monitoring of medication therapy: development of a validation framework and its application on a European sample of kidney transplant patients Kris Denhaerynck, Petra Schäfer-Keller, James Young, Jürg Steiger, Andreas Bock, and Sabina De Geest PMCID: PMC2275282 Applications of Bayesian approach in modelling risk of malaria-related hospital mortality Lawrence N Kazembe, Tobias F Chirwa, Jupiter S Simbeye, and Jimmy J Namangale PMCID: PMC2287185 A methodological framework to distinguish spectrum effects from spectrum biases and to assess diagnostic and screening test accuracy for patient populations: Application to the Papanicolaou cervical cancer smear test Caroline Elie, Joël Coste, and the French Society of Clinical Cytology Study Group PMCID: PMC2291065 The harvest plot: A method for synthesising evidence about the differential effects of interventions David Ogilvie, Debra Fayter, Mark Petticrew, Amanda Sowden, Sian Thomas, Margaret Whitehead, and Gill Worthy PMCID: PMC2270283 A comparison of two methods for estimating prevalence ratios Martin R Petersen and James A Deddens PMCID: PMC2292207 Differential response effects of data collection mode in a cancer screening study of unmarried women ages 40–75 years: A randomized trial Melissa A Clark, Michelle L Rogers, Gene F Armstrong, William Rakowski, and Frederick J Kviz PMCID: PMC2294133 Assessing the order of magnitude of outcomes in single-arm cohorts through systematic comparison with corresponding cohorts: An example from the AMOS study Harald J Hamre, Anja Glockmann, Wilfried Tröger, Gunver S Kienle, and Helmut Kiene PMCID: PMC2323398 Demonstrating the robustness of population surveillance data: implications of error rates on demographic and mortality estimates Edward Fottrell, Peter Byass, and Yemane Berhane PMCID: PMC2288611 The impact of consent on observational research: a comparison of outcomes from consenters and non consenters to an observational study Una Macleod and Graham CM Watt PMCID: PMC2374792 The statistical analysis of a clinical trial when a protocol amendment changed the inclusion criteria Christian Lösch and Markus Neuhäuser PMCID: PMC2359757 Motives for (not) participating in a lifestyle intervention trial Jeroen Lakerveld, Wilhelmina IJzelenberg, Maurits W van Tulder, Irene M Hellemans, Jan A Rauwerda, Albert C van Rossum, and Jaap C Seidell PMCID: PMC2365955 Reducing the probability of false positive research findings by pre-publication validation – Experience with a large multiple sclerosis database Martin Daumer, Ulrike Held, Katja Ickstadt, Moritz Heinz, Siegfried Schach, and George Ebers PMCID: PMC2358908 Unit-specific calibration of Actigraph accelerometers in a mechanical setup – Is it worth the effort? The effect on random output variation caused by technical inter-instrument variability in the laboratory and in the field Niels C Moeller, Lars Korsholm, Peter L Kristensen, Lars B Andersen, Niels Wedderkopp, and Karsten Froberg PMCID: PMC2383921 Recommendations by Cochrane Review Groups for assessment of the risk of bias in studies Andreas Lundh and Peter C Gøtzsche PMCID: PMC2375895 A markov model to evaluate hospital readmission Nicola Bartolomeo, Paolo Trerotoli, Annamaria Moretti, and Gabriella Serio PMCID: PMC2386136 Comparison of two dependent within subject coefficients of variation to evaluate the reproducibility of measurement devices Mohamed M Shoukri, Dilek Colak, Namik Kaya, and Allan Donner PMCID: PMC2383920 Retrivability in The Danish National Hospital Registry of HIV and hepatitis B and C coinfection diagnoses of patients managed in HIV centers 1995–2004 Niels Obel, Hanne Reinholdt, Lars H Omland, Frederik Engsig, Henrik T Sørensen, and Ann-Brit E Hansen PMCID: PMC2386497 Responsiveness of five condition-specific and generic outcome assessment instruments for chronic pain Felix Angst, Martin L Verra, Susanne Lehmann, and André Aeschlimann PMCID: PMC2386498 Determinants of participation in a longitudinal two-stage study of the health consequences of the Chornobyl nuclear power plant accident Lin T Guey, Evelyn J Bromet, Semyon F Gluzman, Victoria Zakhozha, and Vlodomyr Paniotto PMCID: PMC2396662 Comparison of generalized estimating equations and quadratic inference functions using data from the National Longitudinal Survey of Children and Youth (NLSCY) database Adefowope Odueyungbo, Dillon Browne, Noori Akhtar-Danesh, and Lehana Thabane PMCID: PMC2396173 Examining intra-rater and inter-rater response agreement: A medical chart abstraction study of a community-based asthma care program Teresa To, Eileen Estrabillo, Chengning Wang, and Lisa Cicutto PMCID: PMC2396663 Bayes rules for optimally using Bayesian hierarchical regression models in provider profiling to identify high-mortality hospitals Peter C Austin PMCID: PMC2415179 Reporting of Human Genome Epidemiology (HuGE) association studies: An empirical assessment Ajay Yesupriya, Evangelos Evangelou, Fotini K Kavvoura, Nikolaos A Patsopoulos, Melinda Clyne, Matthew C Walsh, Bruce K Lin, Wei Yu, Marta Gwinn, John PA Ioannidis, and Muin J Khoury PMCID: PMC2413261 The ratio of means method as an alternative to mean differences for analyzing continuous outcome variables in meta-analysis: A simulation study Jan O Friedrich, Neill KJ Adhikari, and Joseph Beyene PMCID: PMC2430201 Rasch fit statistics and sample size considerations for polytomous data Adam B Smith, Robert Rush, Lesley J Fallowfield, Galina Velikova, and Michael Sharpe PMCID: PMC2440760 Simpson's paradox visualized: The example of the Rosiglitazone meta-analysis Gerta Rücker and Martin Schumacher PMCID: PMC2438436 On reporting results from randomized controlled trials with recurrent events Lisa Kuramoto, Boris G Sobolev, and Meghan G Donaldson PMCID: PMC2438437 The changing causal foundations of cancer-related symptom clustering during the final month of palliative care: A longitudinal study Karin Olson, Leslie Hayduk, Marilyn Cree, Ying Cui, Hue Quan, John Hanson, Peter Lawlor, and Florian Strasser PMCID: PMC2435535 Challenges of self-reported medical conditions and electronic medical records among members of a large military cohort Besa Smith, Laura K Chu, Tyler C Smith, Paul J Amoroso, Edward J Boyko, Tomoko I Hooper, Gary D Gackstetter, Margaret AK Ryan, and the Millennium Cohort Study Team PMCID: PMC2447848 Workplace restructurings in intervention studies – a challenge for design, analysis and interpretation Ole Olsen, Karen Albertsen, Martin Lindhardt Nielsen, Kjeld Børge Poulsen, Sisse Malene Frydendal Gron, and Hans Lennart Brunnberg PMCID: PMC2440762 Integrated analysis of incidence, progression, regression and disappearance probabilities Guan-Hua Huang PMCID: PMC2459200 Disagreement in primary study selection between systematic reviews on negative pressure wound therapy Frank Peinemann, Natalie McGauran, Stefan Sauerland, and Stefan Lange PMCID: PMC2496910 Does it matter whether the recipient of patient questionnaires in general practice is the general practitioner or an independent researcher? The REPLY randomised trial James A Desborough, Peter Butters, Debi Bhattacharya, Richard C Holland, and David J Wright PMCID: PMC2447849 Relative performance of different exposure modeling approaches for sulfur dioxide concentrations in the air in rural western Canada Igor Burstyn, Nicola M Cherry, Yutaka Yasui, and Hyang-Mi Kim PMCID: PMC2474846 Methods for the thematic synthesis of qualitative research in systematic reviews James Thomas and Angela Harden PMCID: PMC2478656 A coarsened multinomial regression model for perinatal mother to child transmission of HIV Charlotte C Gard and Elizabeth R Brown PMCID: PMC2515333 Reliability and validity of two frequently used self-administered physical activity questionnaires in adolescents Vegar Rangul, Turid Lingaas Holmen, Nanna Kurtze, Koenraad Cuypers, and Kristian Midthjell PMCID: PMC2492874 Advantages of the nested case-control design in diagnostic research Cornelis J Biesheuvel, Yvonne Vergouwe, Ruud Oudega, Arno W Hoes, Diederick E Grobbee, and Karel GM Moons PMCID: PMC2500041 Testing for differences in distribution tails to test for differences in 'maximum' lifespan Guimin Gao, Wen Wan, Sijian Zhang, David T Redden, and David B Allison PMCID: PMC2529340 Vignette studies of medical choice and judgement to study caregivers' medical decision behaviour: systematic review Lucas M Bachmann, Andrea Mühleisen, Annekatrin Bock, Gerben ter Riet, Ulrike Held, and Alfons GH Kessels PMCID: PMC2515847 Regression toward the mean – a detection method for unknown population mean based on Mee and Chua's algorithm Thomas Ostermann, Stefan N Willich, and Rainer Lüdtke PMCID: PMC2527023 The efficiency and effectiveness of utilizing diagrams in interviews: an assessment of participatory diagramming and graphic elicitation Muriah J Umoquit, Mark J Dobrow, Louise Lemieux-Charles, Paul G Ritvo, David R Urbach, and Walter P Wodchis PMCID: PMC2527311 Non-response to a life course socioeconomic position indicator in surveillance: comparison of telephone and face-to-face modes Catherine R Chittleborough, Anne W Taylor, Fran E Baum, and Janet E Hiller PMCID: PMC2527312 Engaging participants in a complex intervention trial in Australian General Practice David Perkins, Mark F Harris, Jocelyn Tan, Bettina Christl, Jane Taggart, and Mahnaz Fanaian PMCID: PMC2533668 Performing meta-analysis with incomplete statistical information in clinical trials Jianbing Ma, Weiru Liu, Anthony Hunter, and Weiya Zhang PMCID: PMC2571096 Sampling 'hard-to-reach' populations in health research: yield from a study targeting Americans living in Canada Danielle A Southern, Steven Lewis, Colleen J Maxwell, James R Dunn, Tom W Noseworthy, Gail Corbett, Karen Thomas, and William A Ghali PMCID: PMC2525653 Pooling overdispersed binomial data to estimate event rate Yinong Young-Xu and K Arnold Chan PMCID: PMC2538541 Alternative regression models to assess increase in childhood BMI Andreas Beyerlein, Ludwig Fahrmeir, Ulrich Mansmann, and André M Toschke PMCID: PMC2543035 Industry-supported meta-analyses compared with meta-analyses with non-profit or no support: Differences in methodological quality and conclusions Anders W Jørgensen, Katja L Maric, Britta Tendal, Annesofie Faurschou, and Peter C Gøtzsche PMCID: PMC2553412 Data management for prospective research studies using SAS® software Robin L Kruse and David R Mehr PMCID: PMC2546431 The HCV Synthesis Project: Scope, methodology, and preliminary results Rebecca K Stern, Holly Hagan, Corina Lelutiu-Weinberger, Don Des Jarlais, Roberta Scheinmann, Shiela Strauss, Enrique R Pouget, and Peter Flom PMCID: PMC2546430 Reliability and validity of the international physical activity questionnaire in the Nord-Trøndelag health study (HUNT) population of men Nanna Kurtze, Vegar Rangul, and Bo-Egil Hustvedt PMCID: PMC2577099 Intervention, recruitment and evaluation challenges in the Bangladeshi community: Experience from a peer lead educational course SM Choudhury, S Brophy, MA Fareedi, B Zaman, P Ahmed, and DRR Williams PMCID: PMC2571097 Double–blind control of the data manager doesn't have any impact on data entry reliability and should be considered as an avoidable cost Davide Mauri, Vasiliki Karampoiki, Jacopo Mauri, Konstantinos Kamposioras, Georgios Alexiou, Georgios Ferentinos, Lamprini Tsali, Ioanna Karathanasi, Christina Peponi, and the SESy_Europe task Force PMCID: PMC2596166 Alternative methods to analyse the impact of HIV mutations on virological response to antiviral therapy Linda Wittkop, Daniel Commenges, Isabelle Pellegrin, Dominique Breilh, Didier Neau, Denis Lacoste, Jean-Luc Pellegrin, Geneviève Chêne, François Dabis, and Rodolphe Thiébaut PMCID: PMC2605450 Accuracy of self-reported body weight, height and waist circumference in a Dutch overweight working population Johanna C Dekkers, Marieke F van Wier, Ingrid JM Hendriksen, Jos WR Twisk, and Willem van Mechelen PMCID: PMC2605752 Maximising response rates in household telephone surveys Joanne O'Toole, Martha Sinclair, and Karin Leder PMCID: PMC2605451 Use of the Oxford Handicap Scale at hospital discharge to predict Glasgow Outcome Scale at 6 months in patients with traumatic brain injury Pablo Perel, Phil Edwards, Haleema Shakur, and Ian Roberts PMCID: PMC2613916 Accuracy of death certification and hospital record linkage for identification of incident stroke Shubhada Sinha, Phyo K Myint, Robert N Luben, and Kay-Tee Khaw PMCID: PMC2605452 Statistical methods to correct for verification bias in diagnostic studies are inadequate when there are few false negatives: a simulation study Angel M Cronin and Andrew J Vickers PMCID: PMC2600821 Estimating preferences for a dermatology consultation using Best-Worst Scaling: Comparison of various methods of analysis Terry N Flynn, Jordan J Louviere, Tim J Peters, and Joanna Coast PMCID: PMC2600822 Improving quality indicator report cards through Bayesian modeling Byron J Gajewski, Jonathan D Mahnken, and Nancy Dunton PMCID: PMC2596790 A comparison of two methods for estimating odds ratios: Results from the National Health Survey Enayatollah Bakhshi, Mohammad R Eshraghian, Kazem Mohammad, and Behjat Seifi PMCID: PMC2613917 Debates Content and communication: How can peer review provide helpful feedback about the writing? Karen Shashok PMCID: PMC2268697 Conducting a meta-ethnography of qualitative literature: Lessons learnt Salla Atkins, Simon Lewin, Helen Smith, Mark Engel, Atle Fretheim, and Jimmy Volmink PMCID: PMC2374791 |
