Scratch lottery tickets are a poor incentive to respond to mailed questionnaires.

abstract：BACKGROUND:Measuring body mass index (BMI) has been proposed as a method of screening for preventive primary care and population surveillance of childhood obesity. However, the accuracy of routinely collected measurements has been questioned. The purpose of this study was to assess the reliability of height, length and...

journal_title：BMC medical research methodology

authors： Carsley S,Parkin PC,Tu K,Pullenayegum E,Persaud N,Maguire JL,Birken CS,TARGet Kids! Collaboration.

更新日期：2019-04-24 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: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: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:Cluster randomised controlled trials (CRCTs) are frequently used in health service evaluation. Assuming an average cluster size, required sample sizes are readily computed for both binary and continuous outcomes, by estimating a design effect or inflation factor. However, where the number of clusters are fix...

journal_title：BMC medical research methodology

authors： Hemming K,Girling AJ,Sitch AJ,Marsh J,Lilford RJ

更新日期：2011-06-30 00:00:00

abstract：BACKGROUND:The "real" effect size of a medical therapy is constant over time. In contrast, the effect size reported in randomised controlled trials (RCTs) may change over time because the sum of all kinds of bias influencing the reported effectiveness is not necessarily constant. As this would affect the validity of me...

journal_title：BMC medical research methodology

authors： Gehr BT,Weiss C,Porzsolt F

更新日期：2006-05-11 00:00:00

abstract：BACKGROUND:Functioning and disability are universal human experiences. However, our current understanding of functioning from a comprehensive perspective is limited. The development of the International Classification of Functioning, Disability and Health (ICF) on the one hand and recent developments in graphical model...

journal_title：BMC medical research methodology

authors： Kalisch M,Fellinghauer BA,Grill E,Maathuis MH,Mansmann U,Bühlmann P,Stucki G

更新日期：2010-02-11 00:00:00

abstract：BACKGROUND:Various papers have addressed pros and cons of the stepped wedge cluster randomized trial design (SWD). However, some issues have not or only limitedly been addressed. Our aim was to provide a comprehensive overview of all merits and limitations of the SWD to assist researchers, reviewers and medical ethics ...

journal_title：BMC medical research methodology

authors： de Hoop E,van der Tweel I,van der Graaf R,Moons KG,van Delden JJ,Reitsma JB,Koffijberg H

更新日期：2015-10-30 00:00:00

abstract：BACKGROUND:The BSI-18 contains the three six-item scales somatization, depression, and anxiety as well as the Global Severity Index (GSI), including all 18 items. The BSI-18 is the latest and shortest of the multidimensional versions of the Symptom-Checklist 90-R, but its psychometric properties have not been sufficien...

journal_title：BMC medical research methodology

authors： Franke GH,Jaeger S,Glaesmer H,Barkmann C,Petrowski K,Braehler E

更新日期：2017-01-26 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:Disease registers aim to collect information about all instances of a disease or condition in a defined population of individuals. Traditionally methods of operating disease registers have required that notifications of cases be identified by unique identifiers such as social security number or national iden...

journal_title：BMC medical research methodology

authors： Churches T

更新日期：2003-01-06 00:00:00

abstract：BACKGROUND:The ethical, methodological, and technical aspects of pediatric research, often results in complications and delays in implementation. Our objective was to identify factors associated with the implementation duration of hospital-based pediatric studies. METHODS:All hospital-based pediatric studies sponsored...

journal_title：BMC medical research methodology

authors： Meier-Girard D,Tibi A,Abdoul H,Prot-Labarthe S,Brion F,Bourdon O,Alberti C

更新日期：2016-03-29 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: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: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: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: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:The International Cancer Benchmarking Partnership aims to study international differences in cancer survival and the possible causes. Participating countries are Australia, Canada, Norway, Sweden, Denmark and the UK and a particular focus area is differences in awareness and beliefs about cancer. In this con...

journal_title：BMC medical research methodology

authors： Hvidberg L,Pedersen AF,Wulff CN,Carlsen AH,Vedsted P

更新日期：2017-04-26 00:00:00

abstract：BACKGROUND:The lack of suitable and reliable scales to measure self-reported health and health behaviour among people with intellectual disabilities (ID) is an important methodological challenge in health research. This study, which was undertaken together with co-researchers with ID, explores possibilities for self-re...

journal_title：BMC medical research methodology

authors： Vlot-van Anrooij K,Tobi H,Hilgenkamp TIM,Leusink GL,Naaldenberg J

更新日期：2018-07-16 00:00:00

abstract：BACKGROUND:In many studies the information of patients who are dying in the hospital is censored when examining the change in length of hospital stay (cLOS) due to hospital-acquired infections (HIs). While appropriate estimators of cLOS are available in literature, the existence of the bias due to censoring of deaths w...

journal_title：BMC medical research methodology

authors： Rahman S,von Cube M,Schumacher M,Wolkewitz M

更新日期：2018-05-30 00:00:00

abstract：BACKGROUND:The Behavioral Risk Factor Surveillance System (BRFSS) is a network of health-related telephone surveys--conducted by all 50 states, the District of Columbia, and participating US territories-that receive technical assistance from CDC. Data users often aggregate BRFSS state samples for national estimates wit...

journal_title：BMC medical research methodology

authors： Iachan R,Pierannunzi C,Healey K,Greenlund KJ,Town M

更新日期：2016-11-15 00:00:00

abstract：BACKGROUND:This paper focuses on measuring the efficiency and effectiveness of two diagramming methods employed in key informant interviews with clinicians and health care administrators. The two methods are 'participatory diagramming', where the respondent creates a diagram that assists in their communication of answe...

journal_title：BMC medical research methodology

authors： Umoquit MJ,Dobrow MJ,Lemieux-Charles L,Ritvo PG,Urbach DR,Wodchis WP

更新日期：2008-08-08 00:00:00

abstract：BACKGROUND:In the era of evidence based medicine, with systematic reviews as its cornerstone, adequate quality assessment tools should be available. There is currently a lack of a systematically developed and evaluated tool for the assessment of diagnostic accuracy studies. The aim of this project was to combine empiri...

journal_title：BMC medical research methodology

authors： Whiting P,Rutjes AW,Reitsma JB,Bossuyt PM,Kleijnen J

更新日期：2003-11-10 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: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:The Pathobiology of Prediabetes in A Biracial Cohort study is a prospective evaluation of the transition from normal to impaired glucose regulation among African American and Caucasian adults with parental type 2 diabetes. This report describes recruitment strategies and relative yields for the 376 enrolled ...

journal_title：BMC medical research methodology

authors： Ebenibo S,Edeoga C,Ammons A,Egbuonu N,Dagogo-Jack S,Pathobiology of Prediabetes in a Biracial Cohort (POP-ABC) Research Group.

更新日期：2013-05-10 00:00:00

abstract：BACKGROUND:Modern modelling techniques may potentially provide more accurate predictions of binary outcomes than classical techniques. We aimed to study the predictive performance of different modelling techniques in relation to the effective sample size ("data hungriness"). METHODS:We performed simulation studies bas...

journal_title：BMC medical research methodology

authors： van der Ploeg T,Austin PC,Steyerberg EW

更新日期：2014-12-22 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：BACKGROUND:Diet plays an important role in chronic disease, and the use of dietary pattern analysis has grown rapidly as a way of deconstructing the complexity of nutritional intake and its relation to health. Pattern analysis methods, such as principal component analysis (PCA), have been used to investigate various di...

journal_title：BMC medical research methodology

authors： Zhang F,Tapera TM,Gou J

更新日期：2018-10-29 00:00:00

abstract：BACKGROUND:Disease incidence and prevalence are both core indicators of population health. Incidence is generally not as readily accessible as prevalence. Cohort studies and electronic health record systems are two major way to estimate disease incidence. The former is time-consuming and expensive; the latter is not av...

journal_title：BMC medical research methodology

authors： Hu XF,Young K,Chan HM

更新日期：2017-01-23 00:00:00