Social network analysis methods for exploring SARS-CoV-2 contact tracing data
Contact tracing data of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic is used to estimate basic epidemiological parameters. Contact tracing data could also be potentially used for assessin... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - September 17, 2020 Category: Research Authors: Karikalan Nagarajan, Malaisamy Muniyandi, Bharathidasan Palani and Senthil Sellappan Tags: Research article Source Type: research

Modeling socio-demographic and clinical factors influencing psychiatric inpatient service use: a comparison of models for zero-Inflated and overdispersed count data
Psychiatric disorders may occur as a single episode or be persistent and relapsing, sometimes leading to suicidal behaviours. The exact causes of psychiatric disorders are hard to determine but easy access to ... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - September 16, 2020 Category: Research Authors: Sharmin Sharker, Lloyd Balbuena, Gene Marcoux and Cindy Xin Feng Tags: Research article Source Type: research

Recruitment of adolescents with suicidal ideation in the emergency department: lessons from a randomized controlled pilot trial of a youth suicide prevention intervention
Emergency Departments (EDs) are a first point-of-contact for many youth with mental health and suicidality concerns and can serve as an effective recruitment source for randomized controlled trials (RCTs) of m... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - September 14, 2020 Category: Research Authors: Matthew Tracey, Yaron Finkelstein, Reva Schachter, Kristin Cleverley, Suneeta Monga, Melanie Barwick, Peter Szatmari, Myla E. Moretti, Andrew Willan, Joanna Henderson and Daphne J. Korczak Tags: Research article Source Type: research

Correction to: Two-stage Bayesian hierarchical modeling for blinded and unblinded safety monitoring in randomized clinical trials
An amendment to this paper has been published and can be accessed via the original article. (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - September 11, 2020 Category: Research Authors: Junhao Liu, Jo Wick, Renee ’ H. Martin, Caitlyn Meinzer, Dooti Roy and Byron Gajewski Tags: Correction Source Type: research

Establishment of a pediatric COVID-19 biorepository: unique considerations and opportunities for studying the impact of the COVID-19 pandemic on children
COVID-19, the disease caused by the highly infectious and transmissible coronavirus SARS-CoV-2, has quickly become a morbid global pandemic. Although the impact of SARS-CoV-2 infection in children is less clin... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - September 11, 2020 Category: Research Authors: Rosiane Lima, Elizabeth F. Gootkind, Denis De la Flor, Laura J. Yockey, Evan A. Bordt, Paolo D ’Avino, Shen Ning, Katerina Heath, Katherine Harding, Jaclyn Zois, Grace Park, Margot Hardcastle, Kathleen A. Grinke, Sheila Grimmel, Susan P. Davidson, Pamel Tags: Research article Source Type: research

The effects of different lookback periods on the sociodemographic structure of the study population and on the estimation of incidence rates: analyses with German claims data
Defining incident cases has always been a challenging issue for researchers working with routine data. Lookback periods should enable researchers to identify and exclude recurrent cases and increase the accura... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - September 11, 2020 Category: Research Authors: Jelena Epping, Siegfried Geyer and Juliane Tetzlaff Tags: Research article Source Type: research

Evaluation of the reporting quality of observational studies in master of public health dissertations in China
Master of public health (MPH) plays an important role in Chinese medical education, and the dissertations is an important part of MPH education. In MPH dissertations, most are observational studies. Compared w... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - September 11, 2020 Category: Research Authors: Shuangyang Dai, Xiaobin Zhou, Hong Xu, Beibei Li and Jingao Zhang Tags: Research article Source Type: research

Ensuring protocol compliance and data transparency in clinical trials using Blockchain smart contracts
Clinical Trials (CTs) help in testing and validating the safety and efficacy of newly discovered drugs on specific patient population cohorts. However, these trials usually experience many challenges, such as ... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - September 7, 2020 Category: Research Authors: Ilhaam A. Omar, Raja Jayaraman, Khaled Salah, Mecit Can Emre Simsekler, Ibrar Yaqoob and Samer Ellahham Tags: Technical advance Source Type: research

Suitability of administrative claims databases for bariatric surgery research – is the glass half-full or half-empty?
Claims databases are generally considered inadequate for obesity research due to suboptimal capture of body mass index (BMI) measurements. This might not be true for bariatric surgery because of reimbursement ... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - September 7, 2020 Category: Research Authors: Xiaojuan Li, Kristina H. Lewis, Katherine Callaway, J. Frank Wharam and Sengwee Toh Tags: Research article Source Type: research

A tutorial on methodological studies: the what, when, how and why
Methodological studies – studies that evaluate the design, analysis or reporting of other research-related reports – play an important role in health research. They help to highlight issues in the conduct of r... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - September 7, 2020 Category: Research Authors: Lawrence Mbuagbaw, Daeria O. Lawson, Livia Puljak, David B. Allison and Lehana Thabane Tags: Commentary Source Type: research

A new randomization procedure based on multiple covariates and applicable to parallel studies with simultaneous enrollment of all subjects prior to intervention
Parallel intervention studies involving volunteers usually require a procedure to allocate the subjects to study-arms. Statistical models to evaluate the different outcomes of the study-arms will include study... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - September 3, 2020 Category: Research Authors: Eric D. Schoen and Suzan Wopereis Tags: Technical advance Source Type: research

Handling informative dropout in longitudinal analysis of health-related quality of life: application of three approaches to data from the esophageal cancer clinical trial PRODIGE 5/ACCORD 17
Health-related quality of life (HRQoL) has become a major endpoint to assess the clinical benefit of new therapeutic strategies in oncology clinical trials. Typically, HRQoL outcomes are analyzed using linear ... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - September 3, 2020 Category: Research Authors: B. Cuer, C. Mollevi, A. Anota, E. Charton, B. Juzyna, T. Conroy and C. Touraine Tags: Research article Source Type: research

Statistical design of Phase II/III clinical trials for testing therapeutic interventions in COVID-19 patients
Because of unknown features of the COVID-19 and the complexity of the population affected, standard clinical trial designs on treatments may not be optimal in such patients. We propose two independent clinical... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 31, 2020 Category: Research Authors: Shesh N. Rai, Chen Qian, Jianmin Pan, Anand Seth, Deo Kumar Srivastava and Aruni Bhatnagar Tags: Research article Source Type: research

Group penalized generalized estimating equation for correlated event-related potentials and biomarker selection
Event-related potentials (ERP) data are widely used in brain studies that measure brain responses to specific stimuli using electroencephalogram (EEG) with multiple electrodes. Previous ERP data analyses haven... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 31, 2020 Category: Research Authors: Ye Lin, Jianhui Zhou, Swapna Kumar, Wanze Xie, Sarah K. G. Jensen, Rashidul Haque, Charles A. Nelson, William A. Petri Jr and Jennie Z. Ma Tags: Research article Source Type: research

Inference about time-dependent prognostic accuracy measures in the presence of competing risks
Evaluating a candidate marker or developing a model for predicting risk of future conditions is one of the major goals in medicine. However, model development and assessment for a time-to-event outcome may be ... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 28, 2020 Category: Research Authors: Rajib Dey, Giada Sebastiani and Paramita Saha-Chaudhuri Tags: Technical advance Source Type: research

Dynamic RMST curves for survival analysis in clinical trials
The data from immuno-oncology (IO) therapy trials often show delayed effects, cure rate, crossing hazards, or some mixture of these phenomena. Thus, the proportional hazards (PH) assumption is often violated s... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 27, 2020 Category: Research Authors: Jason J. Z. Liao, G. Frank Liu and Wen-Chi Wu Tags: Technical advance Source Type: research

Rapid establishment of a COVID-19 perinatal biorepository: early lessons from the first 100 women enrolled
Collection of biospecimens is a critical first step to understanding the impact of COVID-19 on pregnant women and newborns - vulnerable populations that are challenging to enroll and at risk of exclusion from ... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 26, 2020 Category: Research Authors: Lydia L. Shook, Jessica E. Shui, Adeline A. Boatin, Samantha Devane, Natalie Croul, Lael M. Yonker, Juan D. Matute, Rosiane S. Lima, Muriel Schwinn, Dana Cvrk, Laurel Gardner, Robin Azevedo, Suzanne Stanton, Evan A. Bordt, Laura J. Yockey, Alessio Fasano Tags: Research article Source Type: research

A specific method for qualitative medical research: the IPSE (Inductive Process to analyze the Structure of lived Experience) approach
This paper reports the construction and use of a specific method for qualitative medical research: The Inductive Process to Analyze the Structure of lived Experience (IPSE), an inductive and phenomenological appr... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 26, 2020 Category: Research Authors: Jordan Sibeoni, Laurence Verneuil, Emilie Manolios and Anne R évah-Levy Tags: Technical advance Source Type: research

Searching for Programme theories for a realist evaluation: a case study comparing an academic database search and a simple Google search
Realist methodologies are increasingly being used to evaluate complex interventions in health and social care. Programme theory (ideas and assumptions of how a particular intervention works) development is the... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 26, 2020 Category: Research Authors: Susanne Coleman, Judy M. Wright, Jane Nixon, Lisette Schoonhoven, Maureen Twiddy and Joanne Greenhalgh Tags: Research article Source Type: research

Protocol registration issues of systematic review and meta-analysis studies: a survey of global researchers
Although protocol registration of systematic reviews/meta-analysis (SR/MA) is still not mandatory, it is highly recommended that authors publish their SR/MA protocols prior to submitting their manuscripts for ... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 25, 2020 Category: Research Authors: Gehad Mohamed Tawfik, Hoang Thi Nam Giang, Sherief Ghozy, Ahmed M. Altibi, Hend Kandil, Huu-Hoai Le, Peter Samuel Eid, Ibrahim Radwan, Omar Mohamed Makram, Tong Thi Thu Hien, Mahmoud Sherif, As-Saba Hossain, Tai Luu Lam Thang, Livia Puljak, Hosni Salem, T Tags: Research article Source Type: research

Measuring clinical uncertainty and equipoise by applying the agreement study methodology to patient management decisions
Clinical uncertainty and equipoise are vague notions that play important roles in contemporary problems of medical care and research, including the design and conduct of pragmatic trials. Our goal was to show ... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 25, 2020 Category: Research Authors: Robert Fahed, Tim E. Darsaut, Behzad Farzin, Miguel Chagnon and Jean Raymond Tags: Research article Source Type: research

Comparison of up-front cash cards and checks as incentives for participation in a clinician survey: a study within a trial
Evidence is needed regarding effective incentive strategies to increase clinician survey response rates. Cash cards are increasingly used as survey incentives; they are appealing because of their convenience a... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 17, 2020 Category: Research Authors: Lydia E. Pace, Yeonsoo S. Lee, Nadine Tung, Jada G. Hamilton, Camila Gabriel, Sahitya C. Raja, Colby Jenkins, Anthony Braswell, Susan M. Domchek, Heather Symecko, Kelsey Spielman, Beth Y. Karlan, Jenny Lester, Daniella Kamara, Jeffrey Levin, Kelly Morgan Tags: Research article Source Type: research

Two-stage Bayesian hierarchical modeling for blinded and unblinded safety monitoring in randomized clinical trials
Monitoring and reporting of drug safety during a clinical trial is essential to its success. More recent attention to drug safety has encouraged statistical methods development for monitoring and detecting pot... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 17, 2020 Category: Research Authors: Junhao Liu, Jo Wick, Renee ’ H. Martin, Caitlyn Meinzer, Dooti Roy and Byron Gajewski Tags: Research article Source Type: research

International severe asthma registry (ISAR): protocol for a global registry
Severe asthma exerts a disproportionately heavy burden on patients and health care. Due to the heterogeneity of the severe asthma population, many patients need to be evaluated to understand the clinical featu... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 14, 2020 Category: Research Authors: J. Mark FitzGerald, Trung N. Tran, Marianna Alacqua, Alan Altraja, Vibeke Backer, Leif Bjermer, Unnur Bjornsdottir, Arnaud Bourdin, Guy Brusselle, Lakmini Bulathsinhala, John Busby, Giorgio W. Canonica, Victoria Carter, Isha Chaudhry, You Sook Cho, George Tags: Research article Source Type: research

Evaluation of approaches for multiple imputation of three-level data
Three-level data arising from repeated measures on individuals who are clustered within larger units are common in health research studies. Missing data are prominent in such longitudinal studies and multiple ... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 12, 2020 Category: Research Authors: Rushani Wijesuriya, Margarita Moreno-Betancur, John B. Carlin and Katherine J. Lee Tags: Research article Source Type: research

A four-step strategy for handling missing outcome data in randomised trials affected by a pandemic
The coronavirus pandemic (Covid-19) presents a variety of challenges for ongoing clinical trials, including an inevitably higher rate of missing outcome data, with new and non-standard reasons for missingness.... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 12, 2020 Category: Research Authors: Suzie Cro, Tim P. Morris, Brennan C. Kahan, Victoria R. Cornelius and James R. Carpenter Tags: Research article Source Type: research

Disease progression of cancer patients during COVID-19 pandemic: a comprehensive analytical strategy by time-dependent modelling
As the whole world is experiencing the cascading effect of a new pandemic, almost every aspect of modern life has been disrupted. Because of health emergencies during this period, widespread fear has resulted ... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 12, 2020 Category: Research Authors: Atanu Bhattacharjee, Gajendra K. Vishwakarma, Souvik Banerjee and Sharvari Shukla Tags: Research article Source Type: research

Joint analysis of duration of ventilation, length of intensive care, and mortality of COVID-19 patients: a multistate approach
The clinical progress of patients hospitalized due to COVID-19 is often associated with severe pneumonia which may require intensive care, invasive ventilation, or extracorporeal membrane oxygenation (ECMO). T... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 11, 2020 Category: Research Authors: Derek Hazard, Klaus Kaier, Maja von Cube, Marlon Grodd, Lars Bugiera, Jerome Lambert and Martin Wolkewitz Tags: Research article Source Type: research

Factors affecting adolescents ’ participation in randomized controlled trials evaluating the effectiveness of healthcare interventions: the case of the STEPSTONES project
Recruitment of adolescents to intervention studies is a known challenge. For randomized controlled trials (RCT) to be generalizable, reach must be assessed, which means ascertaining how many of the intended po... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - August 3, 2020 Category: Research Authors: Markus Saarij ärvi, Lars Wallin, Philip Moons, Hanna Gyllensten and Ewa-Lena Bratt Tags: Research article Source Type: research

Doubly robust estimator of risk in the presence of censoring dependent on time-varying covariates: application to a primary prevention trial for coronary events with pravastatin
In the presence of dependent censoring even after stratification of baseline covariates, the Kaplan –Meier estimator provides an inconsistent estimate of risk. To account for dependent censoring, time-varying c... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 31, 2020 Category: Research Authors: Takuya Kawahara, Tomohiro Shinozaki and Yutaka Matsuyama Tags: Research article Source Type: research

Informing retention in longitudinal cohort studies through a social marketing lens: Raine Study Generation 2 participants ’ perspectives on benefits and barriers to participation
Longitudinal cohort studies have made significant contributions to medical discoveries and provide the impetus for health interventions which reduce the risk of disease. Establishing and maintaining these coho... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 29, 2020 Category: Research Authors: Leesa Costello, Julie Dare, Manon Dontje and Leon Straker Tags: Research article Source Type: research

Measuring psychological safety in healthcare teams: developing an observational measure to complement survey methods
Psychological safety is a dynamic team-level phenomenon which exists when team members believe that it is safe to take interpersonal risks. In healthcare teams, the presence of psychological safety is critical... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 29, 2020 Category: Research Authors: R óisín O’Donovan, Desirée Van Dun and Eilish McAuliffe Tags: Research article Source Type: research

The influence of social media on recruitment to surgical trials
Social media has changed the way surgeons communicate worldwide, particularly in dissemination of trial results. However, it is unclear if social media could be used in recruitment to surgical trials. This stu... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 28, 2020 Category: Research Authors: Carly Nichola Bisset, Ben Carter, Jennifer Law, Jonathan Hewitt, Kat Parmar and Susan Joan Moug Tags: Research article Source Type: research

The use of restricted mean time lost under competing risks data
Under competing risks, the commonly used sub-distribution hazard ratio (SHR) is not easy to interpret clinically and is valid only under the proportional sub-distribution hazard (SDH) assumption. This paper intro... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 25, 2020 Category: Research Authors: Jingjing Lyu, Yawen Hou and Zheng Chen Tags: Research article Source Type: research

Linkage of the CHHiP randomised controlled trial with primary care data: a study investigating ways of supplementing cancer trials and improving evidence-based practice
Randomised controlled trials (RCTs) are the gold standard for evidence-based practice. However, RCTs can have limitations. For example, translation of findings into practice can be limited by design features, ... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 25, 2020 Category: Research Authors: Agnieszka Lemanska, Rachel C. Byford, Clare Cruickshank, David P. Dearnaley, Filipa Ferreira, Clare Griffin, Emma Hall, William Hinton, Simon de Lusignan, Julian Sherlock and Sara Faithfull Tags: Research article Source Type: research

Accuracy of random-forest-based imputation of missing data in the presence of non-normality, non-linearity, and interaction
Missing data are common in statistical analyses, and imputation methods based on random forests (RF) are becoming popular for handling missing data especially in biomedical research. Unlike standard imputation... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 25, 2020 Category: Research Authors: Shangzhi Hong and Henry S. Lynn Tags: Research article Source Type: research

Using the Cochrane Central Register of Controlled Trials to identify clinical trial registration is insufficient: a cross-sectional study
While conducting systemic reviews, searching for ongoing or unpublished trials is critical to address publication bias. As of April 2019, records of ongoing or unpublished randomized and/or quasi-randomized co... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 25, 2020 Category: Research Authors: Masahiro Banno, Yasushi Tsujimoto and Yuki Kataoka Tags: Research article Source Type: research

COVID-19 prevalence estimation by random sampling in population - optimal sample pooling under varying assumptions about true prevalence
The number of confirmed COVID-19 cases divided by population size is used as a coarse measurement for the burden of disease in a population. However, this fraction depends heavily on the sampling intensity and... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 23, 2020 Category: Research Authors: Ola Brynildsrud Tags: Research article Source Type: research

A novel method for controlling unobserved confounding using double confounders
Controlling unobserved confounding still remains a great challenge in observational studies, and a series of strict assumptions of the existing methods usually may be violated in practice. Therefore, it is urg... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 22, 2020 Category: Research Authors: Lu Liu, Lei Hou, Yuanyuan Yu, Xinhui Liu, Xiaoru Sun, Fan Yang, Qing Wang, Ming Jing, Yeping Xu, Hongkai Li and Fuzhong Xue Tags: Technical advance Source Type: research

A graphical approach to assess the goodness-of-fit of random-effects linear models when the goal is to measure individual benefits of medical treatments in severely ill patients
Two-dimensional personalized medicine (2-PM) models are tools for measuring individual benefits of medical treatments for chronic diseases which have potential applications in personalized medicine. These mode... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 20, 2020 Category: Research Authors: Zhiwen Wang and Francisco J. Diaz Tags: Research article Source Type: research

Comparison of hierarchical EMAX and NDLM models in dose-response for early phase clinical trials
Phase II clinical trials primarily aim to find the optimal dose and investigate the relationship between dose and efficacy relative to standard of care (control). Therefore, before moving forward to a phase II... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 20, 2020 Category: Research Authors: Xiaqing Huang and Byron J. Gajewski Tags: Research article Source Type: research

WHO Trial Registration Data Set (TRDS) extension for traditional Chinese medicine 2020: recommendations, explanation, and elaboration
Although the WHO Trial Registration Data Set (TRDS) has been published for many years, the quality of clinical trial registrations with traditional Chinese medicine (TCM) is still not satisfactory, especially ... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 17, 2020 Category: Research Authors: Xuan Zhang, Liang Lan, Jacky C. P. Chan, Linda L. D. Zhong, Chung-Wah Cheng, Wai-Ching Lam, Ran Tian, Chen Zhao, Tai-Xiang Wu, Hong-Cai Shang, Ai-Ping Lyu and Zhao-Xiang Bian Tags: Research article Source Type: research

Modeling adaptive response profiles in a vaccine clinical trial
Vaccine clinical studies typically provide time-resolved data on adaptive response read-outs in response to the administration of that particular vaccine to a cohort of individuals. However, modeling such data... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 16, 2020 Category: Research Authors: Dicle Hasdemir, Robert A. van den Berg, Antoine van Kampen and Age K. Smilde Tags: Research article Source Type: research

The statistical importance of a study for a network meta-analysis estimate
In pairwise meta-analysis, the contribution of each study to the pooled estimate is given by its weight, which is based on the inverse variance of the estimate from that study. For network meta-analysis (NMA),... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 14, 2020 Category: Research Authors: Gerta R ücker, Adriani Nikolakopoulou, Theodoros Papakonstantinou, Georgia Salanti, Richard D. Riley and Guido Schwarzer Tags: Research article Source Type: research

Quality of evidence in a post-Soviet country: evaluation of methodological quality of controlled clinical trials published in national journals from Uzbekistan
Most researchers in Uzbekistan prefer to publish their reports in journals of their home country. Moreover, the proportion of healthcare practitioners who prefer to use these national sources of information al... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 13, 2020 Category: Research Authors: Timur Aripov, Dilfuza Aniyozova and Irina Gorbunova Tags: Research article Source Type: research

Cross-cultural validation and psychometrics ’ evaluation of women’s experience of maternity care scale in French: the ESEM
Evaluating women ’s satisfaction should reflect the entire maternity care experience (antenatal, intrapartum and postnatal). The Women’s Experience Maternity Care Scale (WEMCS) questionnaire enables this assess... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 11, 2020 Category: Research Authors: L. Floris and C. de Labrusse Tags: Research article Source Type: research

Correction to: Baseline-adjusted proportional odds models for the quantification of treatment effects in trials with ordinal sum score outcomes
An amendment to this paper has been published and can be accessed via the original article. (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 9, 2020 Category: Research Authors: Muriel Buri, Armin Curt, John Steeves and Torsten Hothorn Tags: Correction Source Type: research

Participants who were difficult to recruit at baseline are less likely to complete a follow-up questionnaire – results from the German National Cohort
With declining response proportions in population-based research the importance of evaluating the effectiveness of measures aimed at improving response increases. We investigated whether an additional flyer wi... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 9, 2020 Category: Research Authors: Stefan Rach, Kathrin G ünther and Birte Hadeler Tags: Research article Source Type: research

Multivariate network meta-analysis incorporating class effects
Network meta-analysis synthesises data from a number of clinical trials in order to assess the comparative efficacy of multiple healthcare interventions in similar patient populations. In situations where clin... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 8, 2020 Category: Research Authors: Rhiannon K. Owen, Sylwia Bujkiewicz, Douglas G. Tincello and Keith R. Abrams Tags: Research article Source Type: research

Multiple imputation with missing indicators as proxies for unmeasured variables: simulation study
Within routinely collected health data, missing data for an individual might provide useful information in itself. This occurs, for example, in the case of electronic health records, where the presence or abse... (Source: BMC Medical Research Methodology)
Source: BMC Medical Research Methodology - July 8, 2020 Category: Research Authors: Matthew Sperrin and Glen P. Martin Tags: Research article Source Type: research