Measurement properties of the Danish version of the Awareness and Beliefs about Cancer (ABC) measure.

abstract：BACKGROUND:Physical activity is an important determinant of health. Walking is the most common physical activity performed by adults and the presence of sidewalks along roads is a determinant of walking. Geographic information systems (GIS) can be used to measure sidewalks; however, GIS sidewalk data are difficult to a...

journal_title：BMC medical research methodology

authors： Janssen I,Rosu A

更新日期：2012-03-29 00:00:00

abstract：BACKGROUND:Diabetes-related lower limb amputations are associated with considerable morbidity and mortality and are usually preceded by foot ulceration. The available systematic reviews of aggregate data are compromised because the primary studies report both adjusted and unadjusted estimates. As adjusted meta-analyses...

journal_title：BMC medical research methodology

authors： Crawford F,Anandan C,Chappell FM,Murray GD,Price JF,Sheikh A,Simpson CR,Maxwell M,Stansby GP,Young MJ,Abbott CA,Boulton AJ,Boyko EJ,Kastenbauer T,Leese GP,Monami M,Monteiro-Soares M,Rith-Najarian SJ,Veves A,Coates N

更新日期：2013-02-15 00:00:00

abstract：BACKGROUND:The choice between paper data collection methods and electronic data collection (EDC) methods has become a key question for clinical researchers. There remains a need to examine potential benefits, efficiencies, and innovations associated with an EDC system in a multi-center medical record review study. MET...

journal_title：BMC medical research methodology

authors： Thwin SS,Clough-Gorr KM,McCarty MC,Lash TL,Alford SH,Buist DS,Enger SM,Field TS,Frost F,Wei F,Silliman RA

更新日期：2007-06-18 00:00:00

abstract：BACKGROUND:The aim was to describe a strategy for recruitment of healthy volunteers (HV) to a randomized trial that assessed the efficacy of different telephone techniques to assist HV in performing cardiac massage for vital emergency. Participation in the randomized trial was not financially compensated, however HV we...

journal_title：BMC medical research methodology

authors： Luzurier Q,Damm C,Lion F,Daniel C,Pellerin L,Tavolacci MP

更新日期：2015-01-05 00:00:00

abstract：BACKGROUND:Missing data present a challenge to many research projects. The problem is often pronounced in studies utilizing self-report scales, and literature addressing different strategies for dealing with missing data in such circumstances is scarce. The objective of this study was to compare six different imputatio...

journal_title：BMC medical research methodology

authors： Shrive FM,Stuart H,Quan H,Ghali WA

更新日期：2006-12-13 00:00:00

abstract：BACKGROUND:Multi-centre randomized controlled clinical trials play an important role in modern evidence-based medicine. Advantages of collecting data from more than one site are numerous, including accelerated recruitment and increased generalisability of results. Mixed models can be applied to account for potential cl...

journal_title：BMC medical research methodology

authors： Harden M,Friede T

更新日期：2018-11-29 00:00:00

abstract：BACKGROUND:The prevalence of Chronic Obstructive Pulmonary Disease (COPD) in many developed countries appears to be increasing. There is some evidence from Latin America that COPD is a growing cause of death, but information on prevalence is scant. It is possible that, due to the high frequency of smoking in these coun...

journal_title：BMC medical research methodology

authors： Menezes AM,Victora CG,Perez-Padilla R,PLATINO Team.

更新日期：2004-06-17 00:00:00

abstract：BACKGROUND:Dynamic risk models, which incorporate disease-free survival and repeated measurements over time, might yield more accurate predictions of future health status compared to static models. The objective of this study was to develop and apply a dynamic prediction model to estimate the risk of developing type 2 ...

journal_title：BMC medical research methodology

authors： Parast L,Mathews M,Friedberg MW

更新日期：2019-08-14 00:00:00

abstract：BACKGROUND:With the increasing implementation of web-based, mobile health interventions in clinical trials, it is crucial for researchers to address the security and privacy concerns of patient information according to high ethical standards. The full process of meeting these standards is often made more complicated du...

journal_title：BMC medical research methodology

authors： Eagleson R,Altamirano-Diaz L,McInnis A,Welisch E,De Jesus S,Prapavessis H,Rombeek M,Seabrook JA,Park T,Norozi K

更新日期：2017-03-17 00:00:00

abstract：BACKGROUND:Postal questionnaires are widely used to collect outcome data on participants. However, a poor response to questionnaires will reduce the statistical power of the study and may introduce bias. A meta analysis of ten trials offering study results, largely in the fields of education and marketing, was shown to...

journal_title：BMC medical research methodology

authors： Cockayne S,Torgerson DJ

更新日期：2005-10-26 00:00:00

abstract：BACKGROUND:Although some nonparametric methods have been proposed in the literature to test for the equality of median survival times for censored data in medical research, in general they have inflated type I error rates, which make their use limited in practice, especially when the sample sizes are small. METHODS:In...

journal_title：BMC medical research methodology

authors： Chen Z,Zhang G

更新日期：2016-03-16 00:00:00

abstract：BACKGROUND:Dichotomisation of continuous outcomes has been rightly criticised by statisticians because of the loss of information incurred. However to communicate a comparison of risks, dichotomised outcomes may be necessary. Peacock et al. developed a distributional approach to the dichotomisation of normally distribu...

journal_title：BMC medical research methodology

authors： Sauzet O,Ofuya M,Peacock JL

更新日期：2015-04-24 00:00:00

abstract：BACKGROUND:We demonstrate an application of Group-Based Trajectory Modeling (GBTM) based on the beta distribution. It is offered as an alternative to the normal distribution for modeling continuous longitudinal data that are poorly fit by the normal distribution even with censoring. The primary advantage of the beta di...

journal_title：BMC medical research methodology

authors： Elmer J,Jones BL,Nagin DS

更新日期：2018-11-26 00:00:00

abstract：BACKGROUND:Mean arterial pressure (MAP), bispectral index (BIS), and minimum alveolar concentration (MAC) represent valuable, yet dynamic intraoperative monitoring variables. They provide information related to poor outcomes when considered together, however their collective behavior across time has not been characteri...

journal_title：BMC medical research methodology

authors： Schnetz MP,Hochheiser HS,Danks DJ,Landsittel DP,Vogt KM,Ibinson JW,Whitehurst SL,McDermott SP,Duque MG,Kaynar AM

更新日期：2019-01-14 00:00:00

abstract：BACKGROUND:In a random effects meta-analysis model, true treatment effects for each study are routinely assumed to follow a normal distribution. However, normality is a restrictive assumption and the misspecification of the random effects distribution may result in a misleading estimate of overall mean for the treatmen...

journal_title：BMC medical research methodology

authors： Yamaguchi Y,Maruo K,Partlett C,Riley RD

更新日期：2017-07-19 00:00:00

abstract：BACKGROUND:Family members are increasingly involved in the care of cancer patients, however many are not prepared for this challenging role. Intervention-based studies are valuable to inform the most appropriate and effective support for caregivers. Barriers in the recruitment of patient/caregiver dyads exist but the r...

journal_title：BMC medical research methodology

authors： Heckel L,Gunn KM,Livingston PM

更新日期：2018-11-21 00:00:00

abstract：BACKGROUND:In the present article, we propose an alternative method for dealing with negative affectivity (NA) biases in research, while investigating the association between a deleterious psychosocial environment at work and poor mental health. First, we investigated how strong NA must be to cause an observed correlat...

journal_title：BMC medical research methodology

authors： Arial M,Wild P

更新日期：2011-08-24 00:00:00

abstract：BACKGROUND:Syntheses of qualitative studies can inform health policy, services and our understanding of patient experience. Meta-ethnography is a systematic seven-phase interpretive qualitative synthesis approach well-suited to producing new theories and conceptual models. However, there are concerns about the quality ...

journal_title：BMC medical research methodology

authors： France EF,Ring N,Thomas R,Noyes J,Maxwell M,Jepson R

更新日期：2014-11-19 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:Interventions in occupational health often target worksites rather than individuals. The objective of this paper is to describe the (lack of) stability in units of analysis in occupational health and safety intervention projects directed toward worksites. METHODS:A case study approach is used to describe na...

journal_title：BMC medical research methodology

authors： Olsen O,Albertsen K,Nielsen ML,Poulsen KB,Gron SM,Brunnberg HL

更新日期：2008-06-13 00:00:00

abstract：BACKGROUND:Administrative databases offer vast amounts of data that provide opportunities for cost-effective insights. They simultaneously pose significant challenges to statistical analysis such as the redaction of data because of privacy policies and the provision of data that may not be at the level of detail requir...

journal_title：BMC medical research methodology

authors： Rosychuk RJ,Bachman JWN,Chen A,Hu XJ

更新日期：2020-12-07 00:00:00

abstract：BACKGROUND:Predicting survival of recipients after liver transplantation is regarded as one of the most important challenges in contemporary medicine. Hence, improving on current prediction models is of great interest.Nowadays, there is a strong discussion in the medical field about machine learning (ML) and whether it...

journal_title：BMC medical research methodology

authors： Kantidakis G,Putter H,Lancia C,Boer J,Braat AE,Fiocco M

更新日期：2020-11-16 00:00:00

abstract：BACKGROUND:Mediation is an important issue considered in the behavioral, medical, and social sciences. It addresses situations where the effect of a predictor variable X on an outcome variable Y is explained to some extent by an intervening, mediator variable M. Methods for addressing mediation have been available for ...

journal_title：BMC medical research methodology

authors： Knafl GJ,Knafl KA,Grey M,Dixon J,Deatrick JA,Gallo AM

更新日期：2017-03-21 00:00:00

abstract：BACKGROUND:Within cancer care, dynamic evaluations of the loss in expectation of life provides useful information to patients as well as physicians. The loss of lifetime function yields the conditional loss in expectation of life given survival up to a specific time point. Due to the inevitable censoring in time-to-eve...

journal_title：BMC medical research methodology

authors： Jakobsen LH,Andersson TM,Biccler JL,El-Galaly TC,Bøgsted M

更新日期：2019-01-28 00:00:00

abstract：BACKGROUND:Many biological variables sampled from human subjects show a diurnal pattern, which poses special demands on the techniques used to analyze such data. Furthermore, most biological variables belong to nonlinear dynamical systems, which may make linear statistical techniques less suitable to analyze their dyna...

journal_title：BMC medical research methodology

authors： Toonen RB,Wardenaar KJ,Bos EH,van Ockenburg SL,de Jonge P

更新日期：2018-03-21 00:00:00

abstract：BACKGROUND:This study aimed to investigate whether awareness of being monitored by an accelerometer has an effect on physical activity in young people. METHODS:Eighty healthy participants aged 10-18 years were randomized between blinded and nonblinded groups. The blinded participants were informed that we were testing...

journal_title：BMC medical research methodology

authors： Vanhelst J,Béghin L,Drumez E,Coopman S,Gottrand F

更新日期：2017-07-11 00:00:00

abstract：BACKGROUND:Controlled clinical trials of health care interventions are either explanatory or pragmatic. Explanatory trials test whether an intervention is efficacious; that is, whether it can have a beneficial effect in an ideal situation. Pragmatic trials measure effectiveness; they measure the degree of beneficial ef...

journal_title：BMC medical research methodology

authors： Godwin M,Ruhland L,Casson I,MacDonald S,Delva D,Birtwhistle R,Lam M,Seguin R

更新日期：2003-12-22 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:A key component of the implementation process is identifying potential barriers and facilitators that need to be addressed. The Theoretical Domains Framework (TDF) is one of the most commonly used frameworks for this purpose. When applying the TDF, it is critical to understand the context in which behaviours...

journal_title：BMC medical research methodology

authors： Etherington N,Rodrigues IB,Giangregorio L,Graham ID,Hoens AM,Kasperavicius D,Kelly C,Moore JE,Ponzano M,Presseau J,Sibley KM,Straus S

更新日期：2020-06-26 00:00:00

abstract：BACKGROUND:Cluster randomised trials with unequal sized clusters often have lower precision than with clusters of equal size. To allow for this, sample sizes are inflated by a modified version of the design effect for clustering. These inflation factors are valid under the assumption that randomisation is stratified by...

journal_title：BMC medical research methodology

authors： Martin JT,Hemming K,Girling A

更新日期：2019-06-14 00:00:00