Related Experiment Video
Updated: Jun 26, 2025
10:46
A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
Published on: December 9, 2015
10.7K
Do efficacy results obtained from randomized controlled trials translate to effectiveness data from observational
Stefan Verweij1,2, Wouter Ahmed3, Guiling Zhou1
1Unit of PharmacoTherapy, Epidemiology and Economics, Groningen Research Institute of Pharmacy, Groningen, The Netherlands.
Pharmacoepidemiology and Drug Safety
|May 9, 2024
Summary
Observational studies in relapsing-remitting multiple sclerosis generally align with randomized controlled trials, though estimates may vary in magnitude and precision. Real-world evidence can supplement trial data, aiding extrapolation to diverse patient populations.
Area of Science:
- Clinical Epidemiology
- Pharmacovigilance
- Neurology
Background:
- Randomized controlled trials (RCTs) are the benchmark for regulatory decisions due to observational study limitations.
- Real-world evidence (RWE) from observational studies can be valuable in specific contexts.
- This review compares effect estimates from RCTs and observational studies using multiple sclerosis therapies as a case example.
Purpose of the Study:
- To compare effect estimates between randomized controlled trials (RCTs) and observational studies.
- To assess the consistency of findings for drug therapy in relapsing-remitting multiple sclerosis.
- To evaluate the utility of real-world evidence in complementing pivotal trial data.
Main Methods:
- Conducted a systematic review of RCTs and observational studies.
- Utilized network meta-analysis and posterior predictive distributions for comparison.
- Primary outcome: annualized relapse rate; analyzed drug-specific rate ratios.
Main Results:
- Observational studies yielded estimates with greater magnitudes and lower precision than RCTs.
- Twenty out of 28 treatment comparisons showed similar rate ratios between study designs.
- Seven inconsistencies were linked to two specific disease-modifying therapies.
Conclusions:
- Observational study estimates largely agreed with RCTs when considering posterior predictive distributions.
- Multiple observational studies can supplement RCTs for relapsing-remitting multiple sclerosis.
- RWE may facilitate the extrapolation of trial results to broader patient populations.
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