Treatment effect sizes vary in randomized trials depending on the type of outcome measure
Berthelsen, D. B., Ginnerup-Nielsen, E., Juhl, C., Lund, H., Henriksen, M., Hróbjartsson, A., Nielsen, S. M., Voshaar, M. & Christensen, R., 23 mar. 2020, I : Journal of Clinical Epidemiology. 123, s. 27-38 12 s.
Publikation: Bidrag til tidsskrift › Review › Forskning › peer review
OBJECTIVE: To compare estimated treatment effects of physical therapy (PT) between patient-reported outcome measures (PROMs) and outcomes measured in other ways.
STUDY DESIGN AND SETTING: We selected randomized trials of PT with both a PROM and a non-PROM included in Cochrane systematic reviews (CSRs). Two reviewers independently extracted data and risk-of-bias assessments. Our primary outcome was the ratio of odds ratios (RORs), used to quantify how effect varies between PROMs and non-PROMs; an ROR > 1 indicates larger effect when assessed by using PROMs. We used REML-methods to estimate associations of trial characteristics with effects and between-trial heterogeneity.
RESULTS: From 90 relevant CSRs, 205 PT trials were included. The summary ROR across all the comparisons was not statistically significant (ROR, 0.88 [95% CI: 0.70-1.12]; P = 0.30); however, the heterogeneity was substantial (I2 = 88.1%). When stratifying non-PROMs further into clearly objective non-PROMs (e.g., biomarkers) and other non-PROMs (e.g., aerobic capacity), the PROMs appeared more favorable than did clearly objective non-PROMs (ROR, 1.92 [95% CI: 0.99-3.72]; P = 0.05).
CONCLUSION: Estimated treatment effects based on PROMs are generally comparable with treatment effects measured in other ways. However, in our study, PROMs indicate a more favorable treatment effect compared with treatment effects based on clearly objective outcomes.
Originalsprog | Engelsk |
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Tidsskrift | Journal of Clinical Epidemiology |
Vol/bind | 123 |
Sider (fra-til) | 27-38 |
Antal sider | 12 |
ISSN | 0895-4356 |
DOI | |
Status | E-pub ahead of print - 23 mar. 2020 |
Bibliografisk note
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