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The stepped wedge cluster randomised trial: rationale, design, analysis, and reporting
The stepped wedge cluster randomised trial is a novel research study design that is increasingly being used in the evaluation of service delivery type interventions. The design involves random andExpand
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Change in mental health after smoking cessation: systematic review and meta-analysis
Objective To investigate change in mental health after smoking cessation compared with continuing to smoke. Design Systematic review and meta-analysis of observational studies. Data sources Web ofExpand
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A Menu-Driven Facility for Power and Detectable-Difference Calculations in Stepped-Wedge Cluster-Randomized Trials
This article introduces the Stata menu-driven program steppedwedge, which calculates detectable differences and power for stepped-wedge randomized trials. The command permits continuous, binary, andExpand
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Large scale organisational intervention to improve patient safety in four UK hospitals: mixed method evaluation
Objectives To conduct an independent evaluation of the first phase of the Health Foundation’s Safer Patients Initiative (SPI), and to identify the net additional effect of SPI and any differences inExpand
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Cognitive dysfunction in older subjects with diabetes mellitus: impact on diabetes self-management and use of care services. All Wales Research into Elderly (AWARE) Study.
OBJECTIVE To determine whether cognitive impairment is associated with changes in self-care behaviour and use of health and social services in older subjects with diabetes mellitus. RESEARCH DESIGNExpand
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Multiple component patient safety intervention in English hospitals: controlled evaluation of second phase
Objective To independently evaluate the impact of the second phase of the Health Foundation’s Safer Patients Initiative (SPI2) on a range of patient safety measures. Design A controlled before andExpand
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Comparison of direct and indirect methods of estimating health state utilities for resource allocation: review and empirical analysis
Background and objective Utilities (values representing preferences) for healthcare priority setting are typically obtained indirectly by asking patients to fill in a quality of life questionnaireExpand
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Stepped-wedge cluster randomised controlled trials: a generic framework including parallel and multiple-level designs
Stepped-wedge cluster randomised trials (SW-CRTs) are being used with increasing frequency in health service evaluation. Conventionally, these studies are cross-sectional in design with equallyExpand
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Statistical efficiency and optimal design for stepped cluster studies under linear mixed effects models
In stepped cluster designs the intervention is introduced into some (or all) clusters at different times and persists until the end of the study. Instances include traditional parallel clusterExpand
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Inter-rater reliability of case-note audit: a systematic review
Objective: The quality of clinical care is often assessed by retrospective examination of case-notes (charts, medical records). Our objective was to determine the inter-rater reliability of case-noteExpand
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