Correction for retest effects across repeated measures of cognitive functioning: a longitudinal cohort study of postoperative delirium.

abstract：BACKGROUND:General Practitioners (GPs) respond poorly to postal surveys. Consequently there is potential for reduced data quality and bias in the findings. In general population surveys, response to postal questionnaires may be improved by reducing their length and offering incentives. The aim of this study was to inve...

journal_title：BMC medical research methodology

authors： Cottrell E,Roddy E,Rathod T,Thomas E,Porcheret M,Foster NE

更新日期：2015-01-06 00:00:00

abstract：BACKGROUND:Compelled by the intuitive appeal of predicting each individual patient's risk of an outcome, there is a growing interest in risk prediction models. While the statistical methods used to build prediction models are increasingly well understood, the literature offers little insight to researchers seeking to g...

journal_title：BMC medical research methodology

authors： Schummers L,Himes KP,Bodnar LM,Hutcheon JA

更新日期：2016-09-21 00:00:00

abstract：BACKGROUND:Due to early colonoscopy for some participants, interval-censored observations can be introduced into the data of a colorectal polyp prevention trial. The censoring could be dependent of risk of recurrence if the reasons of having early colonoscopy are associated with recurrence. This can complicate estimati...

journal_title：BMC medical research methodology

authors： Hsu CH,Long Q,Alberts DS

更新日期：2009-09-29 00:00:00

abstract：BACKGROUND:Network meta-analysis can be used to combine results from several randomized trials involving more than two treatments. Potential inconsistency among different types of trial (designs) differing in the set of treatments tested is a major challenge, and application of procedures for detecting and locating inc...

journal_title：BMC medical research methodology

authors： Piepho HP

更新日期：2014-05-10 00:00:00

abstract：BACKGROUND:Many medicines are dosed to achieve a particular therapeutic range, and monitored using therapeutic drug monitoring (TDM). The evidence base for a therapeutic range can be evaluated using systematic reviews, to ensure it continues to reflect current indications, doses, routes and formulations, as well as upd...

journal_title：BMC medical research methodology

authors： Cooney L,Loke YK,Golder S,Kirkham J,Jorgensen A,Sinha I,Hawcutt D

更新日期：2017-06-02 00:00:00

abstract：BACKGROUND:Cross-cultural research with patient-reported outcomes measures (PROMs) assumes that the PROM in the target language will measure the same construct in the same way as the PROM in the source language. Yet translation methods are rarely used to qualitatively maximise construct equivalence or to describe the i...

journal_title：BMC medical research methodology

authors： Hawkins M,Cheng C,Elsworth GR,Osborne RH

更新日期：2020-05-26 00:00:00

abstract：BACKGROUND:Due to limited duration of follow up in clinical trials of cancer treatments, estimates of lifetime survival benefits are typically derived using statistical extrapolation methods. To justify the method used, a range of approaches have been proposed including statistical goodness-of-fit tests and comparing e...

journal_title：BMC medical research methodology

authors： Bullement A,Willis A,Amin A,Schlichting M,Hatswell AJ,Bharmal M

更新日期：2020-05-06 00:00:00

abstract：BACKGROUND:Clinical quality registries and other systems that conduct routine post-discharge surveillance of patient outcomes following surgery may have difficulty surveying patients who have limited proficiency in the language of the healthcare provider. Interpreter proxies (family and carers) are often used due to li...

journal_title：BMC medical research methodology

authors： Xue D,Churches T,Armstrong E,Mittal R,Naylor JM,Harris IA

更新日期：2019-11-14 00:00:00

abstract：:The recently published "COSMIN" guidelines aim to rate properties of outcome instruments and state two issues with regard to responsiveness which is the instrument's ability to detect change over time. These issues are comparison of score changes with change of an external criterion using correlations and the judgemen...

journal_title：BMC medical research methodology

authors： Angst F

更新日期：2011-11-18 00:00:00

abstract：BACKGROUND:To describe how frequently harm is reported in the abstract of high impact factor medical journals. METHODS: DESIGN AND POPULATION:We carried out a blinded structured review of a random sample of 363 Randomised Controlled Trials (RCTs) carried out on human beings, and published in high impact factor medica...

journal_title：BMC medical research methodology

authors： Bernal-Delgado E,Fisher ES

更新日期：2008-03-27 00:00:00

abstract：BACKGROUND:A recent paper found that terminal digits of statistical values in Nature deviated significantly from an equiprobable distribution, indicating errors or inconsistencies in rounding. This finding, as well as the discovery that a large percentage of p values were inconsistent with reported test statistics, led...

journal_title：BMC medical research methodology

authors： Jeng M

更新日期：2006-09-13 00:00:00

abstract：BACKGROUND:The study design and protocol that underpin a randomised controlled trial (RCT) are critical for the ultimate success of the trial. Although RCTs are considered the gold standard for research, there are multiple threats to their validity such as participant recruitment and retention, identifying a meaningful...

journal_title：BMC medical research methodology

authors： Hall CL,Brown S,James M,Martin JL,Brown N,Selby K,Clarke J,Williams L,Sayal K,Hollis C,Groom MJ

更新日期：2019-06-18 00:00:00

abstract：BACKGROUND:The systematic collection of high-quality mortality data is a prerequisite in designing relevant drowning prevention programmes. This descriptive study aimed to assess the quality (i.e., level of specificity) of cause-of-death reporting using ICD-10 drowning codes across 69 countries. METHODS:World Health O...

journal_title：BMC medical research methodology

authors： Lu TH,Lunetta P,Walker S

更新日期：2010-04-08 00:00:00

abstract：BACKGROUND:Typically, randomization software should allow users to exert control over the different aspects of randomization including block design, provision of unique identifiers and control over the format and type of program output. While some of these characteristics have been addressed by available software, none...

journal_title：BMC medical research methodology

authors： Saghaei M

更新日期：2004-11-09 00:00:00

abstract：BACKGROUND:The Computer Adaptive Test version of the Community Reintegration of Injured Service Members measure (CRIS-CAT) consists of three scales measuring Extent of, Perceived Limitations in, and Satisfaction with community integration. The CRIS-CAT was developed using item response theory methods. The purposes of t...

journal_title：BMC medical research methodology

authors： Resnik L,Borgia M,Ni P,Pirraglia PA,Jette A

更新日期：2012-09-17 00:00:00

abstract：BACKGROUND:Retaining participants in cohort studies with multiple follow-up waves is difficult. Commonly, researchers are faced with the problem of missing data, which may introduce biased results as well as a loss of statistical power and precision. The STROBE guidelines von Elm et al. (Lancet, 370:1453-1457, 2007); V...

journal_title：BMC medical research methodology

authors： Karahalios A,Baglietto L,Carlin JB,English DR,Simpson JA

更新日期：2012-07-11 00:00:00

abstract：BACKGROUND:Evidence suggests that differences exist in physical activity (PA) participation among Culturally and Linguistically Diverse (CALD) children and adolescents. It is possible that these differences could be influenced by variations in measurement technique and instrument reliability. However, culturally sensit...

journal_title：BMC medical research methodology

authors： Strugnell C,Renzaho A,Ridley K,Burns C

更新日期：2011-08-25 00:00:00

abstract：BACKGROUND:Precise predictions of incidence and mortality rates due to breast cancer (BC) are required for planning of public health programs as well as for clinical services. A number of approaches has been established for prediction of mortality using stochastic models. The performance of these models intensely depen...

journal_title：BMC medical research methodology

authors： Mubarik S,Hu Y,Yu C

更新日期：2020-12-09 00:00:00

abstract：BACKGROUND:To provide empirical evidence about prevalence, reporting and handling of missing outcome data in systematic reviews with network meta-analysis and acknowledgement of their impact on the conclusions. METHODS:We conducted a systematic survey including all published systematic reviews of randomized controlled...

journal_title：BMC medical research methodology

authors： Spineli LM,Yepes-Nuñez JJ,Schünemann HJ

更新日期：2018-10-24 00:00:00

abstract：BACKGROUND:Evidence mapping describes the quantity, design and characteristics of research in broad topic areas, in contrast to systematic reviews, which usually address narrowly-focused research questions. The breadth of evidence mapping helps to identify evidence gaps, and may guide future research efforts. The Globa...

journal_title：BMC medical research methodology

authors： Bragge P,Clavisi O,Turner T,Tavender E,Collie A,Gruen RL

更新日期：2011-06-17 00:00:00

abstract：BACKGROUND:Collection of buccal cells from saliva for DNA extraction offers a less invasive and convenient alternative to venipuncture blood collection that may increase participation in genetic epidemiologic studies. However, dried blood spot collection, which is also a convenient method, offers a means of collecting ...

journal_title：BMC medical research methodology

authors： Bhatti P,Kampa D,Alexander BH,McClure C,Ringer D,Doody MM,Sigurdson AJ

更新日期：2009-11-13 00:00:00

abstract：BACKGROUND:Evidence-based health care is informed by results of randomized clinical trials (RCTs) and their syntheses in meta-analyses. When the trial outcomes measured are not clearly described in trial publications, knowledge synthesis, translation, and decision-making may be impeded. While heterogeneity in outcomes ...

journal_title：BMC medical research methodology

authors： Monsour A,Mew EJ,Patel S,Chee-A-Tow A,Saeed L,Santos L,Courtney DB,Watson PN,Monga S,Szatmari P,Offringa M,Butcher NJ

更新日期：2020-05-25 00:00:00

abstract：BACKGROUND:It is notoriously difficult to recruit patients to randomised controlled trials in primary care. This is particularly true when the disease process under investigation occurs relatively infrequently and must be investigated during a brief time window. Bell's palsy, an acute unilateral paralysis of the facial...

journal_title：BMC medical research methodology

authors： McKinstry B,Hammersley V,Daly F,Sullivan F

更新日期：2007-03-28 00:00:00

abstract：BACKGROUND:Greater transparency and, in particular, sharing of patient-level data for further scientific research is an increasingly important topic for the pharmaceutical industry and other organisations who sponsor and conduct clinical trials as well as generally in the interests of patients participating in studies....

journal_title：BMC medical research methodology

authors： Tucker K,Branson J,Dilleen M,Hollis S,Loughlin P,Nixon MJ,Williams Z

更新日期：2016-07-08 00:00:00

abstract：BACKGROUND:The construction of prediction intervals (PIs) for future body mass index (BMI) values of individual children based on a recent German birth cohort study with n = 2007 children is problematic for standard parametric approaches, as the BMI distribution in childhood is typically skewed depending on age. METHO...

journal_title：BMC medical research methodology

authors： Mayr A,Hothorn T,Fenske N

更新日期：2012-01-25 00:00:00

abstract：BACKGROUND:The initial vanguard cohort of the U.S. National Children's Study was a pregnancy and birth cohort study that sought to enroll some women prior to pregnancy, and to assess exposures early in pregnancy. METHODS:During the recruitment phase (2009-2010), geographically based sampling was used to recruit women ...

journal_title：BMC medical research methodology

authors： Stanford JB,Brenner R,Fetterer D,Palmer L,Schoendorf KC,U.S. National Children’s Study.

更新日期：2015-09-24 00:00:00

abstract：BACKGROUND:Methods for describing one's confidence in the available evidence are useful for end-users of evidence reviews. Analysts inevitably make judgments about the quality, quantity consistency, robustness, and magnitude of effects observed in the studies identified. The subjectivity of these judgments in several a...

journal_title：BMC medical research methodology

authors： Treadwell JR,Tregear SJ,Reston JT,Turkelson CM

更新日期：2006-10-19 00:00:00

abstract：BACKGROUND:International clinical trials are now rapidly expanding into Asia. However, the proportion of global trials is higher in South Korea compared to Japan despite implementation of similar governmental support in both countries. The difference in clinical trial environment might influence the respective physicia...

journal_title：BMC medical research methodology

authors： Ito-Ihara T,Hong JH,Kim OJ,Sumi E,Kim SY,Tanaka S,Narita K,Hatta T,Choi EK,Choi KJ,Miyagawa T,Minami M,Murayama T,Yokode M

更新日期：2013-10-25 00:00:00

abstract：BACKGROUND:While randomised controlled trials (RCTs) provide high-quality evidence to guide practice, much routine care is not based upon available RCTs. This disconnect between evidence and practice is not sufficiently well understood. This case study explores this relationship using a novel approach. Better understan...

journal_title：BMC medical research methodology

authors： Byrne BE,Rooshenas L,Lambert HS,Blazeby JM

更新日期：2020-05-12 00:00:00

abstract：BACKGROUND:Clinical study reports (CSRs) have been increasingly utilised within academic research in recent years. European Medicines Agency (EMA) Policy 0070 'Phase 1,' which came into effect in January 2015, requires the publication of regulatory documents such as CSRs from central applications in an anonymised forma...

journal_title：BMC medical research methodology

authors： Ferran JM,Nevitt SJ

更新日期：2019-11-05 00:00:00