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  1. Evaluation of complex interventions should include a process evaluation to give evaluators, researchers, and policy makers greater confidence in the outcomes reported from RCTs. Implementation fidelity can be ...

    Authors: Line Kildal Bragstad, Berit Arnesveen Bronken, Unni Sveen, Ellen Gabrielsen Hjelle, Gabriele Kitzmüller, Randi Martinsen, Kari J. Kvigne, Margrete Mangset and Marit Kirkevold

    Citation: BMC Medical Research Methodology 2019 19:59

    Content type: Research article

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  2. An a priori design is essential to reduce the risk of bias in systematic reviews (SRs). To this end, authors can register their SR with PROSPERO, and/or publish a SR protocol in an academic journal. The latter...

    Authors: Tanja Rombey, Katharina Allers, Tim Mathes, Falk Hoffmann and Dawid Pieper

    Citation: BMC Medical Research Methodology 2019 19:57

    Content type: Research article

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  3. Family health history (FHH) inherently involves collecting proxy reports of health statuses of related family members. Traditionally, such information has been collected from a single informant. More recently,...

    Authors: Jielu Lin, Melanie F. Myers, Laura M. Koehly and Christopher Steven Marcum

    Citation: BMC Medical Research Methodology 2019 19:56

    Content type: Technical advance

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  4. The availability of clinical and therapeutic data drawn from medical records and administrative databases has entailed new opportunities for clinical and epidemiologic research. However, these databases presen...

    Authors: Guillermo Prada-Ramallal, Bahi Takkouche and Adolfo Figueiras

    Citation: BMC Medical Research Methodology 2019 19:53

    Content type: Research article

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  5. The Global Activity Limitation Indicator (GALI) is a single-item measure of functional decline, it is widely used in Europe but it has never been validated in an Asian population. The aim of this study was to ...

    Authors: Ru-Ling Hsiao, Chih-Hsun Wu, Che-Wei Hsu, Yasuhiko Saito and Yu-Hsuan Lin

    Citation: BMC Medical Research Methodology 2019 19:52

    Content type: Research article

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  6. Our work was motivated by the need to, given serum availability and/or financial resources, decide on which samples to test in a serum bank for different pathogens. Simulation-based sample size calculations we...

    Authors: Stéphanie Blaizot, Sereina A. Herzog, Steven Abrams, Heidi Theeten, Amber Litzroth and Niel Hens

    Citation: BMC Medical Research Methodology 2019 19:51

    Content type: Research article

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  7. Choosing the most performing method in terms of outcome prediction or variables selection is a recurring problem in prognosis studies, leading to many publications on methods comparison. But some aspects have ...

    Authors: Simon Bussy, Raphaël Veil, Vincent Looten, Anita Burgun, Stéphane Gaïffas, Agathe Guilloux, Brigitte Ranque and Anne-Sophie Jannot

    Citation: BMC Medical Research Methodology 2019 19:50

    Content type: Research article

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  8. In clinical trials and survival analysis, participants may be excluded from the study due to withdrawal, which is often referred to as lost-to-follow-up (LTF). It is natural to argue that a disease would be ce...

    Authors: Jinheum Kim, Jayoun Kim and Seong W. Kim

    Citation: BMC Medical Research Methodology 2019 19:49

    Content type: Research article

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  9. A strong need exists for a validated tool that clearly defines peer review report quality in biomedical research, as it will allow evaluating interventions aimed at improving the peer review process in well-pe...

    Authors: Cecilia Superchi, José Antonio González, Ivan Solà, Erik Cobo, Darko Hren and Isabelle Boutron

    Citation: BMC Medical Research Methodology 2019 19:48

    Content type: Research article

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  10. The use of correlates of protection (CoPs) in vaccination trials offers significant advantages as useful clinical endpoint substitutes. Vaccines with very high vaccine efficacy (VE) are documented in the liter...

    Authors: Andrea Callegaro and Fabian Tibaldi

    Citation: BMC Medical Research Methodology 2019 19:47

    Content type: Research article

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  11. With progress on both the theoretical and the computational fronts the use of spline modelling has become an established tool in statistical regression analysis. An important issue in spline modelling is the a...

    Authors: Aris Perperoglou, Willi Sauerbrei, Michal Abrahamowicz and Matthias Schmid

    Citation: BMC Medical Research Methodology 2019 19:46

    Content type: Review

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  12. Studies find that identifying additional study data is possible by contacting study authors or experts. What is less certain is the time taken, costs involved and value found by using this supplementary search...

    Authors: Chris Cooper, Juan Talens Bou and Jo Varley-Campbell

    Citation: BMC Medical Research Methodology 2019 19:45

    Content type: Research article

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  13. Quality of life (QoL) is an established outcome measure of substance use disorder treatment. The WHOQOL-BREF is the gold standard tool, but its appropriateness for particularly vulnerable patient populations m...

    Authors: Ashley Elizabeth Muller, Svetlana Skurtveit and Thomas Clausen

    Citation: BMC Medical Research Methodology 2019 19:44

    Content type: Research article

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  14. This systematic review examined the methodological quality of studies and assessed the psychometric qualities of interview-administered Past-week and Usual-week Physical Activity Questionnaires (PAQs). Pubmed ...

    Authors: Kenji Doma, Renée Speyer, Lauren Alese Parsons and Reinie Cordier

    Citation: BMC Medical Research Methodology 2019 19:43

    Content type: Research article

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  15. EHR phenotyping offers the ability to rapidly assemble a precisely defined cohort of patients prescreened for eligibility to participate in health-related research. Even so, stakeholders in the process must st...

    Authors: Laura M. Beskow, Kathleen M. Brelsford and Catherine M. Hammack

    Citation: BMC Medical Research Methodology 2019 19:42

    Content type: Research article

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  16. Precarious status migrants are a group of persons who are vulnerable, heterogeneous, and often suspicious of research teams. They are underrepresented in population-based research projects, and strategies to r...

    Authors: Margaux Fête, Josephine Aho, Magalie Benoit, Patrick Cloos and Valéry Ridde

    Citation: BMC Medical Research Methodology 2019 19:41

    Content type: Research article

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  17. The use of guidelines has shown to improve clinical practice process and structure of health care, but health care providers don’t always use and keep up-to-date with the new clinical practice guidelines. Nurs...

    Authors: Wen Yan, Qian Chen, Xuemei Zhang, Marko Elovainio and Yan Huang

    Citation: BMC Medical Research Methodology 2019 19:40

    Content type: Research article

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  18. Recruitment and retention are two significant barriers in research, particularly for historically underrepresented groups, including racial and ethnic minorities, patients who are low-income, or people with su...

    Authors: Beatrice Huang, Denise De Vore, Chris Chirinos, Jessica Wolf, Devon Low, Rachel Willard-Grace, Stephanie Tsao, Chris Garvey, Doranne Donesky, George Su and David H. Thom

    Citation: BMC Medical Research Methodology 2019 19:39

    Content type: Research article

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  19. Looked after children and care leavers have an increased risk of drug and alcohol use compared to their non-LAC peers. Despite high prevalence rates within this population, looked after children are reported t...

    Authors: Hayley Alderson, Rebecca Brown, Alex Copello, Eileen Kaner, Gillian Tober, Raghu Lingam and Ruth McGovern

    Citation: BMC Medical Research Methodology 2019 19:38

    Content type: Research article

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  20. The aim of the Hellenic National Nutrition and Health Survey was to assess nutritional intake, health status and various behaviors in a representative sample of the Greek population.

    Authors: Emmanuella Magriplis, Ioannis Dimakopoulos, Dimitra Karageorgou, Anastasia-Vasiliki Mitsopoulou, Ioanna Bakogianni, Renata Micha, George Michas, Triantafyllia Ntouroupi, Sophia-Maria Tsaniklidou, Kostantina Argyri, George Danezis, Constantinos Georgiou, Demosthenes B. Panagiotakos and Antonis Zampelas

    Citation: BMC Medical Research Methodology 2019 19:37

    Content type: Research article

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  21. Patient-reported outcome measures developed using Classical Test Theory are commonly comprised of ordinal level items on a Likert response scale are problematic as they do not permit the results to be compared...

    Authors: Michael Robinson, Andrew M. Johnson, David M. Walton and Joy C. MacDermid

    Citation: BMC Medical Research Methodology 2019 19:36

    Content type: Technical advance

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  22. Decision making in health and social care requires robust syntheses of both quantitative and qualitative evidence. Meta-ethnography is a seven-phase methodology for synthesising qualitative studies. Developed ...

    Authors: Emma F. France, Isabelle Uny, Nicola Ring, Ruth L. Turley, Margaret Maxwell, Edward A. S. Duncan, Ruth G. Jepson, Rachel J. Roberts and Jane Noyes

    Citation: BMC Medical Research Methodology 2019 19:35

    Content type: Research article

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  23. Public and patient involvement is a routine element of health services research methods to produce better designed and reported studies. Although co-production is recommended when involving people in research,...

    Authors: Bridie Angela Evans, Alison Porter, Helen Snooks and Vanessa Burholt

    Citation: BMC Medical Research Methodology 2019 19:34

    Content type: Research article

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  24. Mixed effects models have been widely applied in clinical trials that involve longitudinal repeated measurements, which possibly contain missing outcome data. In meta-analysis of individual participant data (I...

    Authors: Hisashi Noma, Kazushi Maruo, Masahiko Gosho, Stephen Z. Levine, Yair Goldberg, Stefan Leucht and Toshi A. Furukawa

    Citation: BMC Medical Research Methodology 2019 19:33

    Content type: Research article

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  25. Reporting quality of systematic reviews’ (SRs) abstracts is important because this is often the only information about a study that readers have. The aim of this study was to assess adherence of SR abstracts i...

    Authors: Katarina Maticic, Marina Krnic Martinic and Livia Puljak

    Citation: BMC Medical Research Methodology 2019 19:32

    Content type: Research article

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  26. In some clinical situations, patients experience repeated events of the same type. Among these, cancer recurrences can result in terminal events such as death. Therefore, here we dynamically predicted the risk...

    Authors: Isao Yokota and Yutaka Matsuyama

    Citation: BMC Medical Research Methodology 2019 19:31

    Content type: Research article

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  27. Self-management support programmes are effective in a range of chronic conditions however there is limited evidence for their use in the treatment of chronic headaches. The aim of this study was to test the fe...

    Authors: Kimberley White, Rachel Potter, Shilpa Patel, Vivien P. Nichols, Kirstie L. Haywood, Siew Wan Hee, Dipesh Mistry, Dawn Carnes, Stephanie J. C. Taylor, Martin Underwood and Manjit S. Matharu

    Citation: BMC Medical Research Methodology 2019 19:30

    Content type: Research article

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  28. Recent advances in sensor technologies have promoted the use of consumer-based accelerometers such as Fitbit Flex in epidemiological and clinical research; however, the validity of the Fitbit Flex in measuring...

    Authors: Nicklaus Redenius, Youngwon Kim and Wonwoo Byun

    Citation: BMC Medical Research Methodology 2019 19:29

    Content type: Research article

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  29. It is common in applied epidemiological and clinical research to convert continuous variables into categorical variables by grouping values into categories. Such categorized variables are then often used as ex...

    Authors: Magne Thoresen

    Citation: BMC Medical Research Methodology 2019 19:28

    Content type: Research article

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  30. It is challenging to manage data collection as planned and creation of opportunities to adapt during the course of enrolment may be needed. This paper aims to summarize the different sampling strategies adopte...

    Authors: Ala’a Alkerwi, Jessica Pastore, Nicolas Sauvageot, Gwenaëlle Le Coroller, Valéry Bocquet, Marylène d’Incau, Gloria Aguayo, Brice Appenzeller, Dritan Bejko, Torsten Bohn, Laurent Malisoux, Sophie Couffignal, Stephanie Noppe, Charles Delagardelle, Jean Beissel, Anna Chioti…

    Citation: BMC Medical Research Methodology 2019 19:27

    Content type: Research article

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  31. In a qualitative evidence synthesis, too much data due to a large number of studies can undermine our ability to perform a thorough analysis. Purposive sampling of primary studies for inclusion in the synthesi...

    Authors: Heather Ames, Claire Glenton and Simon Lewin

    Citation: BMC Medical Research Methodology 2019 19:26

    Content type: Research article

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  32. The aim of this study was to provide guidance to improve the completeness and clarity of meta-ethnography reporting.

    Authors: Emma F. France, Maggie Cunningham, Nicola Ring, Isabelle Uny, Edward A. S. Duncan, Ruth G. Jepson, Margaret Maxwell, Rachel J. Roberts, Ruth L. Turley, Andrew Booth, Nicky Britten, Kate Flemming, Ian Gallagher, Ruth Garside, Karin Hannes, Simon Lewin…

    Citation: BMC Medical Research Methodology 2019 19:25

    Content type: Research

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  33. Recruitment to clinical trials can be challenging. Methods that improve the efficiency of trial recruitment are needed to increase successful study completions. The aim of this study was to ascertain whether s...

    Authors: Amy Rogers, Robert W. V. Flynn, Isla S. Mackenzie and Thomas M. MacDonald

    Citation: BMC Medical Research Methodology 2019 19:24

    Content type: Research article

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  34. 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 expectatio...

    Authors: Lasse H. Jakobsen, Therese M.-L. Andersson, Jorne L. Biccler, Tarec C. El-Galaly and Martin Bøgsted

    Citation: BMC Medical Research Methodology 2019 19:23

    Content type: Research article

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  35. Spiritual care is defined as recognizing and responding to the needs of the human spirit when the individual is facing trauma, illness, or sadness. Providing spiritual care is one of the core aspects of holist...

    Authors: Yanli Hu, Lay Hwa Tiew and Fan Li

    Citation: BMC Medical Research Methodology 2019 19:21

    Content type: Research article

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  36. Health economic models are critical tools to inform reimbursement agencies on health care interventions. Many clinical trials report outcomes using the frequency of an event over a set period of time, for exam...

    Authors: Gian Luca Di Tanna, Joshua K. Porter, Richard B. Lipton, Alan Brennan, Stephen Palmer, Anthony J. Hatswell, Sandhya Sapra and Guillermo Villa

    Citation: BMC Medical Research Methodology 2019 19:20

    Content type: Research article

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  37. Logistic regression is often used for mediation analysis with a dichotomous outcome. However, previous studies showed that the indirect effect and proportion mediated are often affected by a change of scales i...

    Authors: Judith J. M. Rijnhart, Jos W. R. Twisk, Iris Eekhout and Martijn W. Heymans

    Citation: BMC Medical Research Methodology 2019 19:19

    Content type: Research article

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  38. The continual reassessment method (CRM) is a model-based design for phase I trials, which aims to find the maximum tolerated dose (MTD) of a new therapy. The CRM has been shown to be more accurate in targeting...

    Authors: Graham M. Wheeler, Adrian P. Mander, Alun Bedding, Kristian Brock, Victoria Cornelius, Andrew P. Grieve, Thomas Jaki, Sharon B. Love, Lang’o Odondi, Christopher J. Weir, Christina Yap and Simon J. Bond

    Citation: BMC Medical Research Methodology 2019 19:18

    Content type: Technical advance

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  39. 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 outc...

    Authors: Michael P. Schnetz, Harry S. Hochheiser, David J. Danks, Douglas P. Landsittel, Keith M. Vogt, James W. Ibinson, Steven L. Whitehurst, Sean P. McDermott, Melissa Giraldo Duque and Ata M. Kaynar

    Citation: BMC Medical Research Methodology 2019 19:17

    Content type: Research article

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  40. Standard random-effects meta-analysis methods perform poorly when applied to few studies only. Such settings however are commonly encountered in practice. It is unclear, whether or to what extent small-sample-...

    Authors: Svenja E. Seide, Christian Röver and Tim Friede

    Citation: BMC Medical Research Methodology 2019 19:16

    Content type: Research article

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  41. Patient reported outcomes are increasingly used to assess the success of surgical procedures. Patient reported complications are often included as an outcome. However, these data must be validated to be accura...

    Authors: Sung Mu Heo, Justine M. Naylor, Ian A. Harris and Timothy R. Churches

    Citation: BMC Medical Research Methodology 2019 19:15

    Content type: Research article

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  42. Longitudinal categorical variables are sometimes restricted in terms of how individuals transition between categories over time. For example, with a time-dependent measure of smoking categorised as never-smoke...

    Authors: Anurika Priyanjali De Silva, Margarita Moreno-Betancur, Alysha Madhu De Livera, Katherine Jane Lee and Julie Anne Simpson

    Citation: BMC Medical Research Methodology 2019 19:14

    Content type: Research article

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  43. At the diabetic clinic of Jimma University Specialized Hospital, health professionals provide regular follow-up to help people with diabetes live long and relatively healthy lives. Based on patient condition, ...

    Authors: Tafere Tilahun Aniley, Legesse Kassa Debusho, Zelalem Mehari Nigusie, Wondwosen Kassahun Yimer and Belay Birlie Yimer

    Citation: BMC Medical Research Methodology 2019 19:13

    Content type: Research article

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  44. Stepped-wedge cluster randomised trials (SW-CRTs) are a pragmatic trial design, providing an unprecedented opportunity to increase the robustness of evidence underpinning implementation and quality improvement...

    Authors: Caroline A. Kristunas, Karla Hemming, Helen Eborall, Sandra Eldridge and Laura J. Gray

    Citation: BMC Medical Research Methodology 2019 19:12

    Content type: Research article

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  45. A key element in the interaction between clinicians and patients with cancer is reassurance giving. Learning about the stochastic nature of reassurances as well as making inferential statements about the influ...

    Authors: Valentin Popov, Alesha Ellis-Robinson and Gerald Humphris

    Citation: BMC Medical Research Methodology 2019 19:11

    Content type: Research article

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  46. Observational burden of illness studies are used in pharmacoepidemiology to address a variety of objectives, including contextualizing the current treatment setting, identifying important treatment gaps, and p...

    Authors: Karissa M. Johnston, Pardis Lakzadeh, Bonnie M. K. Donato and Shelagh M. Szabo

    Citation: BMC Medical Research Methodology 2019 19:9

    Content type: Technical advance

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  47. Randomised controlled trials (RCTs) are generally regarded as the “gold standard” for providing quantifiable evidence around the effectiveness and cost-effectiveness of new healthcare technologies. In order to...

    Authors: Matthew Franklin and Joanna Thorn

    Citation: BMC Medical Research Methodology 2019 19:8

    Content type: Debate

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