Estimation of colorectal adenoma recurrence with dependent censoring.

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:The effectiveness of multiple innovative recruitment strategies for enrolling Black/African American participants to the Adventist Health Study-2 (AHS-2) is described. The study's focus is diet and breast, prostate and colon cancer. METHODS:Promotions centered on trust, relationship building and incentives ...

journal_title：BMC medical research methodology

authors： Herring P,Butler T,Hall S,Bennett H,Montgomery SB,Fraser G

更新日期：2014-04-03 00:00:00

abstract：BACKGROUND:Estimating costs is essential to the economic analysis of health care programs. Health care costs are often captured from administrative databases or by patient report. Administrative records only provide a partial representation of health care costs and have additional limitations. Patient-completed questio...

journal_title：BMC medical research methodology

authors： Pinto D,Robertson MC,Hansen P,Abbott JH

更新日期：2011-04-13 00:00:00

abstract：BACKGROUND:Aboriginal and Torres Strait Islander peoples are under-reported in administrative health datasets in NSW, Australia. Correct reporting of Aboriginal and Torres Strait Islander peoples is essential to measure the effectiveness of policies and programmes aimed at reducing the health disadvantage experienced b...

journal_title：BMC medical research methodology

authors： Taylor LK,Bentley J,Hunt J,Madden R,McKeown S,Brandt P,Baker D

更新日期：2012-07-02 00:00:00

abstract：BACKGROUND:Video stimulated recall (VSR) is a method of enhancing participants' accounts of the consultation using a video recording of the event to encourage and prompt recall in a post consultation interview. VSR is used in education and education research, and to a lesser extent in medical and nursing research. Litt...

journal_title：BMC medical research methodology

authors： Paskins Z,McHugh G,Hassell AB

更新日期：2014-08-30 00:00:00

abstract：BACKGROUND:There is analytical potential for multiple cause of death data collected from death certificates. This study examines relationships of multiple causes of death as a function of factors available on the death certificate (demographics of decedent, place of death, type of certifier, disposal method, whether an...

journal_title：BMC medical research methodology

authors： Wall MM,Huang J,Oswald J,McCullen D

更新日期：2005-01-17 00:00:00

abstract：BACKGROUND:The primary aim of this study was to provide an estimate of effect size for the functional outcome of operative versus non-operative treatment for patients with an acute rupture of the Achilles tendon using accelerated rehabilitation for both groups of patients. The secondary aim was to assess the use of a c...

journal_title：BMC medical research methodology

authors： Kearney RS,Achten J,Parsons NR,Costa ML

更新日期：2011-04-05 00:00:00

abstract：BACKGROUND:Identifying and assessing degree and type of frailty among older persons is a major challenge when targeting high risk populations to identify preventive interventions. The Vulnerable Elders Survey-(VES-13) is a simple instrument to identify frailty defined as risk for death, functional decline or institutio...

journal_title：BMC medical research methodology

authors： Belmin J,Khellaf L,Pariel S,Jarzebowski W,Valembois L,Zeisel J,Lafuente-Lafuente C

更新日期：2020-02-05 00:00:00

abstract：BACKGROUND:Technical advances following the Human Genome Project revealed that high-quality and -quantity DNA may be obtained from whole saliva samples. However, usability of previously collected samples and the effects of environmental conditions on the samples during collection have not been assessed in detail. In fi...

journal_title：BMC medical research methodology

authors： Nemoda Z,Horvat-Gordon M,Fortunato CK,Beltzer EK,Scholl JL,Granger DA

更新日期：2011-12-19 00:00:00

abstract：BACKGROUND:Participants in voluntary research present a different demographic profile than those who choose not to participate, affecting the generalizability of many studies. Efforts to evaluate these differences have faced challenges, as little information is available from non-participants. Leveraging data from a re...

journal_title：BMC medical research methodology

authors： Dahrouge S,Armstrong CD,Hogg W,Singh J,Liddy C

更新日期：2019-08-07 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: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:The collection of individual-level pandemic (H1N1) 2009 influenza immunization data was considered important to facilitate optimal vaccine delivery and accurate assessment of vaccine coverage. These data are also critical for research aimed at evaluating the new vaccine's safety and effectiveness. Systems us...

journal_title：BMC medical research methodology

authors： Pereira JA,Quach S,Heidebrecht C,Foisy J,Quan S,Finkelstein M,Sikora CA,Bettinger JA,Buckeridge DL,McCarthy A,Deeks S,Kwong JC,Public Health Agency of Canada\/Canadian Institutes of Health Research Influenza Research Network Vacc

更新日期：2010-06-08 00:00:00

abstract：BACKGROUND:The most commonly used survey methods are self-administered questionnaires, telephone interviews, and a mixture of both. But until now evidence out of randomised controlled trials as to whether patient responses differ depending on the survey mode is lacking. Therefore this study assessed whether patient res...

journal_title：BMC medical research methodology

authors： Lungenhausen M,Lange S,Maier C,Schaub C,Trampisch HJ,Endres HG

更新日期：2007-11-22 00:00:00

abstract：:The quality of a consultation provided by a physician can have a profound impact on the quality of care and patient engagement in treatment decisions. When the COPD Assessment Test (CAT) was developed, one of its aims was to aid the communication between physician and patient about the impact of COPD. We developed a n...

journal_title：BMC medical research methodology

authors： Gruffydd-Jones K,Marsden H,Holmes S,Kardos P,Escamilla R,Dal Negro R,Roberts J,Nadeau G,Leather D,Jones P

更新日期：2013-05-10 00:00:00

abstract：BACKGROUND:Studies have shown that industry-sponsored meta-analyses of drugs lack scientific rigour and have biased conclusions. However, these studies have been restricted to certain medical specialities. We compared all industry-supported meta-analyses of drug-drug comparisons with those without industry support. ME...

journal_title：BMC medical research methodology

authors： Jørgensen AW,Maric KL,Tendal B,Faurschou A,Gøtzsche PC

更新日期：2008-09-09 00:00:00

abstract：BACKGROUND:Although a variety of instruments are available that capture stress experience, the assessment of chronic stress has been hindered by the lack of economical screening instruments. Recently, an English-language version of the Trier Inventory for Chronic Stress (TICS-EN) consisting of 57 items according to a s...

journal_title：BMC medical research methodology

authors： Petrowski K,Braehler E,Schmalbach B,Hinz A,Bastianon C,Ritz T

更新日期：2020-12-16 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:Crowding in the emergency department (ED) is associated with increased mortality, increased treatment cost, and reduced quality of care. Crowding arises when demand exceed resources in the ED and a first sign may be increasing waiting time. We aimed to quantify predictors for departure from the ED, and relat...

journal_title：BMC medical research methodology

authors： Eiset AH,Kirkegaard H,Erlandsen M

更新日期：2019-03-29 00:00:00

abstract：BACKGROUND:Small group research in healthcare is important because it deals with interaction and decision-making processes that can help to identify and improve safer patient treatment and care. However, the number of studies is limited due to time- and resource-intensive data processing. The aim of this study was to e...

journal_title：BMC medical research methodology

authors： Aufegger L,Bicknell C,Soane E,Ashrafian H,Darzi A

更新日期：2019-06-13 00:00:00

abstract：BACKGROUND:Given an observed test statistic and its degrees of freedom, one may compute the observed P value with most statistical packages. It is unknown to what extent test statistics and P values are congruent in published medical papers. METHODS:We checked the congruence of statistical results reported in all the ...

journal_title：BMC medical research methodology

authors： García-Berthou E,Alcaraz C

更新日期：2004-05-28 00:00:00

abstract：BACKGROUND:Outcomes collected in randomized clinical trials are observations of random variables that should be independent and identically distributed. However, in some trials, the patients are randomized more than once thus violating both of these assumptions. The probability of an event is not always the same when a...

journal_title：BMC medical research methodology

authors： Hozo I,Djulbegovic B,Clark O,Lyman GH

更新日期：2005-05-10 00:00:00

abstract：BACKGROUND:The likelihood ratio function (LR), the ratio of conditional probabilities of obtaining a specific marker value among those with the event of interest over those without, provides an easily interpretable way to quantify the update of the risk prediction due to the knowledge of the marker value. The LR has be...

journal_title：BMC medical research methodology

authors： Smith AM,Christodouleas JP,Hwang WT

更新日期：2019-05-22 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:This research aims to explore an identified gap in implementation science methodology, that is, how to assess context in implementation research. Context is among the strongest influences on implementation success but is a construct that is poorly understood and reported within the literature. Consequently, ...

journal_title：BMC medical research methodology

authors： Rogers L,De Brún A,McAuliffe E

更新日期：2020-06-15 00:00:00

abstract：BACKGROUND:Multiple imputation (MI) provides an effective approach to handle missing covariate data within prognostic modelling studies, as it can properly account for the missing data uncertainty. The multiply imputed datasets are each analysed using standard prognostic modelling techniques to obtain the estimates of ...

journal_title：BMC medical research methodology

authors： Marshall A,Altman DG,Holder RL,Royston P

更新日期：2009-07-28 00:00:00

abstract：BACKGROUND:Action research (AR) and randomized controlled trials (RCTs) are usually considered to be theoretically and practically incompatible. However, we argue that their respective strengths and weaknesses can be complementary. We illustrate our argument from a recent study assessing the effect of telemonitoring on...

journal_title：BMC medical research methodology

authors： Day K,Kenealy TW,Sheridan NF

更新日期：2016-06-08 00:00:00

abstract：BACKGROUND:Multistate models have become increasingly useful to study the evolution of a patient's state over time in intensive care units ICU (e.g. admission, infections, alive discharge or death in ICU). In addition, in critically-ill patients, data come from different ICUs, and because observations are clustered int...

journal_title：BMC medical research methodology

authors： Liquet B,Timsit JF,Rondeau V

更新日期：2012-06-15 00:00:00

abstract：BACKGROUND:One of the biggest challenges for population health studies is the recruitment of participants. Questions that investigators have asked are "who volunteers for studies?" and "does recruitment method influence characteristics of the samples?" The purpose of this paper was to compare sample characteristics of ...

journal_title：BMC medical research methodology

authors： Leung BM,McDonald SW,Kaplan BJ,Giesbrecht GF,Tough SC

更新日期：2013-12-06 00:00:00

abstract：BACKGROUND:The intraclass correlation coefficient (ICC) is widely used in biomedical research to assess the reproducibility of measurements between raters, labs, technicians, or devices. For example, in an inter-rater reliability study, a high ICC value means that noise variability (between-raters and within-raters) is...

journal_title：BMC medical research methodology

authors： Ionan AC,Polley MY,McShane LM,Dobbin KK

更新日期：2014-11-22 00:00:00