Search Results - "Walters, Stephen J"

Comparison of the Minimally Important Difference for Two Health State Utility Measures: EQ-5D and SF-6D by Stephen J. Walters, Brazier, John E.

“…Background: The SF-6D and EQ-5D are both preference-based measures of health. Empirical work is required to determine what the smallest change is in utility…”
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Analysing cluster randomised controlled trials using GLMM, GEE1, GEE2, and QIF: results from four case studies by Offorha, Bright C, Walters, Stephen J, Jacques, Richard M

“…Using four case studies, we aim to provide practical guidance and recommendations for the analysis of cluster randomised controlled trials. Four modelling…”
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Recruitment, consent and retention of participants in randomised controlled trials: a review of trials published in the National Institute for Health Research (NIHR) Journals Library (1997–2020) by Jacques, Richard M, Ahmed, Rashida, Harper, James, Ranjan, Adya, Saeed, Isra, Simpson, Rebecca M, Walters, Stephen J

“…ObjectivesTo review the consent, recruitment and retention rates for randomised controlled trials (RCTs) funded by the UK’s National Institute for Health…”
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Appropriate statistical methods for analysing partially nested randomised controlled trials with continuous outcomes: a simulation study by Candlish, Jane, Teare, M Dawn, Dimairo, Munyaradzi, Flight, Laura, Mandefield, Laura, Walters, Stephen J

“…In individually randomised trials we might expect interventions delivered in groups or by care providers to result in clustering of outcomes for participants…”
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A breakthrough series collaborative to increase patient participation with hemodialysis tasks: A stepped wedge cluster randomised controlled trial by Fotheringham, James, Barnes, Tania, Dunn, Louese, Lee, Sonia, Ariss, Steven, Young, Tracey, Walters, Stephen J, Laboi, Paul, Henwood, Andy, Gair, Rachel, Wilkie, Martin

“…Background Compared to in-centre, home hemodialysis is associated with superior outcomes. The impact on patient experience and clinical outcomes of…”
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A retrospective analysis of conditional power assumptions in clinical trials with continuous or binary endpoints by Edwards, Julia M, Walters, Stephen J, Julious, Steven A

“…Adaptive clinical trials may use conditional power (CP) to make decisions at interim analyses, requiring assumptions about the treatment effect for remaining…”
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Statistical analysis of publicly funded cluster randomised controlled trials: a review of the National Institute for Health Research Journals Library by Offorha, Bright C, Walters, Stephen J, Jacques, Richard M

“…In cluster randomised controlled trials (cRCTs), groups of individuals (rather than individuals) are randomised to minimise the risk of contamination and/or…”
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Symptom burden according to dialysis day of the week in three times a week haemodialysis patients by Hnynn Si, Pann Ei, Gair, Rachel, Barnes, Tania, Dunn, Louese, Lee, Sonia, Ariss, Steven, Walters, Stephen J, Wilkie, Martin, Fotheringham, James

“…Background Haemodialysis patients experience significant symptom burden and effects on health-related quality of life. Studies have shown increases in fluid…”
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Sample size estimation for randomised controlled trials with repeated assessment of patient-reported outcomes: what correlation between baseline and follow-up outcomes should we assume? by Walters, Stephen J, Jacques, Richard M, Dos Anjos Henriques-Cadby, Inês Bonacho, Candlish, Jane, Totton, Nikki, Xian, Mica Teo Shu

“…Patient-reported outcome measures (PROMs) are now frequently used in randomised controlled trials (RCTs) as primary endpoints. RCTs are longitudinal, and many…”
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COUETTE FLOW OVER A HEAT ISLAND by FORBES, LAWRENCE K., WALTERS, STEPHEN J.

“…A viscous fluid is confined between two smooth horizontal walls, in a vertical channel. The upper wall may move with constant speed, but the lower wall is…”
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Comprehensive review of statistical methods for analysing patient-reported outcomes (PROs) used as primary outcomes in randomised controlled trials (RCTs) published by the UK’s Health Technology Assessment (HTA) journal (1997–2020) by Qian, Yirui, Walters, Stephen J, Jacques, Richard, Flight, Laura

“…ObjectivesTo identify how frequently patient-reported outcomes (PROs) are used as primary and/or secondary outcomes in randomised controlled trials (RCTs) and…”
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Challenges in the design, planning and implementation of trials evaluating group interventions by Biggs, Katie, Hind, Daniel, Gossage-Worrall, Rebecca, Sprange, Kirsty, White, David, Wright, Jessica, Chatters, Robin, Berry, Katherine, Papaioannou, Diana, Bradburn, Mike, Walters, Stephen J, Cooper, Cindy

“…Group interventions are interventions delivered to groups of people rather than to individuals and are used in healthcare for mental health recovery, behaviour…”
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Behavioural activation therapy for post-stroke depression: the BEADS feasibility RCT by Thomas, Shirley A, Drummond, Avril Er, Lincoln, Nadina B, Palmer, Rebecca L, das Nair, Roshan, Latimer, Nicholas R, Hackney, Gemma L, Mandefield, Laura, Walters, Stephen J, Hatton, Rachael D, Cooper, Cindy L, Chater, Timothy F, England, Timothy J, Callaghan, Patrick, Coates, Elizabeth, Sutherland, Katie E, Eshtan, Sarah Jacob, Topcu, Gogem

“…There is currently insufficient evidence for the clinical effectiveness and cost-effectiveness of psychological therapies for post-stroke depression. To…”
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Recommendations for the analysis of individually randomised controlled trials with clustering in one arm - a case of continuous outcomes by Flight, Laura, Allison, Annabel, Dimairo, Munyaradzi, Lee, Ellen, Mandefield, Laura, Walters, Stephen J

“…In an individually randomised controlled trial where the treatment is delivered by a health professional it seems likely that the effectiveness of the…”
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Socio-economic, demographic, and contextual predictors of malnutrition among children aged 6-59 months in Nigeria by Obasohan, Phillips Edomwonyi, Walters, Stephen J, Jacques, Richard, Khatab, Khaled

“…Malnutrition has remained a global public health issue, particularly in low- and middle-income countries (LMICs). Researchers have committed to studying…”
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Early diagnosis of lung cancer: evaluation of a community-based social marketing intervention by Athey, Victoria L, Suckling, Rupert J, Tod, Angela M, Walters, Stephen J, Rogers, Trevor K

“…Poor U.K. lung cancer survival rates may, in part, be due to late diagnosis. To evaluate the effectiveness of a mixed-method community-based social marketing…”
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A systematic review of the “promising zone” design by Edwards, Julia M, Walters, Stephen J, Kunz, Cornelia, Julious, Steven A

“…Abstract Introduction Sample size calculations require assumptions regarding treatment response and variability. Incorrect assumptions can result in under- or…”
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Recommendations for managing missing data, attrition and response shift in palliative and end-of-life care research: Part of the MORECare research method guidance on statistical issues by Preston, Nancy J, Fayers, Peter, Walters, Stephen J, Pilling, Mark, Grande, Gunn E, Short, Vicky, Owen-Jones, Eleanor, Evans, Catherine J, Benalia, Hamid, Higginson, Irene J, Todd, Chris J

“…Background: Statistical analysis in palliative and end-of-life care research can be problematic due to high levels of missing data, attrition and response…”
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What is the relationship between the minimally important difference and health state utility values? The case of the SF-6D by Walters, Stephen J, Brazier, John E

“…The SF-6D is a new single summary preference-based measure of health derived from the SF-36. Empirical work is required to determine what is the smallest…”
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Individual, household and area predictors of anaemia among children aged 6–59 months in Nigeria by Obasohan, Phillips Edomwonyi, Walters, Stephen J., Jacques, Richard, Khatab, Khaled

“…This study aims to determine the prevalence of anaemia among children aged 6–59 months in all states of Nigeria, including the Federal Capital Territory (FCT),…”
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