Influence of attrition, missing data, compliance, and related biases and analyses strategies on treatment effects in randomized controlled trials in rehabilitation: a methodological review
| Autor: | Wendy Machalicek, Susan Armijo-Olivo, Nikolaus Ballenberger, Liz Dennett |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
030506 rehabilitation
medicine.medical_treatment MEDLINE Physical Therapy Sports Therapy and Rehabilitation Affect (psychology) law.invention Compliance (psychology) 03 medical and health sciences 0302 clinical medicine Randomized controlled trial Bias law medicine Humans Attrition Randomized Controlled Trials as Topic Protocol (science) Rehabilitation business.industry medicine.disease Missing data Rehabilitation Research Research Design 0305 other medical science business 030217 neurology & neurosurgery Clinical psychology |
| Zdroj: | European journal of physical and rehabilitation medicine. 56(6) |
| ISSN: | 1973-9095 |
| Popis: | Introduction Attrition, missing data, compliance, and related biases are three interrelated concepts. Previous research has found that these biases can affect the treatment estimates of randomized trials (RCTs). The extent to which the effects of attrition, missing data, compliance and related biases influence effect size estimates in rehabilitation as well as the effect of analytic strategies to mitigate these biases is unknown. Evidence acquisition To compile and synthetize the empirical evidence regarding the effects of attrition and compliance related biases on treatment effect estimates in rehabilitation RCTs. Electronic searches were conducted. Studies were included if they investigated the effects of attrition, missing data, compliance and related biases on treatment estimates. The seven studies meeting inclusion criteria were coded for type of biases and summarized using a narrative and/or quantitative approach when appropriate. Evidence synthesis Findings demonstrated that trials reporting higher levels of attrition (differences in ES: 0.18 [95%CI: 0.15, 0.22 ]), exclusion of participants from analyses (differences in ES: 0.13 [95% CI: -0.03, 0.29]), lack of good control of incomplete outcome data (differences in ES: 0.14 [95%CI: -0.02, 0.30]) and analysis by "as treated"(differences in ES:-0.39 [95%CI: -0.99, 0.2]) or "per protocol" (differences in ES:-0.46 [95%CI: -0.92, 0]) analyses were more likely to have higher effects than those that did not. Conclusions These findings suggest that attrition, missing data, compliance, and related biases have an influence in treatment effect estimates in rehabilitation trials. Therefore, these results should be taken into consideration when designing, conducting and reporting trials in the rehabilitation field. |
| Databáze: | OpenAIRE |
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