Evidence map›Paper›PMID 41586489›Full record

SynthesisAnnals of neurology2026

Distortion in the Communication of Nonsignificant Primary Outcomes: The Spin Strategy in Multiple Sclerosis Trials.

Marta Mascareñas-García, Alejandro Rivero-de-Aguilar, Cristina Candal-Pedreira, Guadalupe García, Carla Guerra-Tort, Lucía Martín-Gisbert, Julia Rey-Brandariz, Mónica Pérez-Ríos Ríos, Beatriz Casal-Acción, María Isolina Santiago-Pérez and 1 more

Abstract readSystematic Review
In one paragraph

Synthesis in Annals of neurology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors.

Marta Mascareñas-GarcíaDepartment of Preventive Medicine and Public Health, Universidade de Santiago de Compostela. Rúa San Francisco s/n, Santiago de Compostela, Spain.ORCID 0009-0006-8319-8922
Alejandro Rivero-de-AguilarDepartment of Preventive Medicine and Public Health, Universidade de Santiago de Compostela. Rúa San Francisco s/n, Santiago de Compostela, Spain.ORCID 0000-0003-1818-8622
Cristina Candal-PedreiraDepartment of Preventive Medicine and Public Health, Universidade de Santiago de Compostela. Rúa San Francisco s/n, Santiago de Compostela, Spain.ORCID 0000-0002-1703-3592
Guadalupe GarcíaDepartment of Preventive Medicine and Public Health, Universidade de Santiago de Compostela. Rúa San Francisco s/n, Santiago de Compostela, Spain.ORCID 0000-0002-3529-7655
Carla Guerra-TortDepartment of Preventive Medicine and Public Health, Universidade de Santiago de Compostela. Rúa San Francisco s/n, Santiago de Compostela, Spain.ORCID 0000-0003-1027-5668
Lucía Martín-GisbertDepartment of Preventive Medicine and Public Health, Universidade de Santiago de Compostela. Rúa San Francisco s/n, Santiago de Compostela, Spain.ORCID 0000-0002-4641-2129
Julia Rey-BrandarizDepartment of Preventive Medicine and Public Health, Universidade de Santiago de Compostela. Rúa San Francisco s/n, Santiago de Compostela, Spain.ORCID 0000-0002-2960-8437
Mónica Pérez-Ríos RíosDepartment of Preventive Medicine and Public Health, Universidade de Santiago de Compostela. Rúa San Francisco s/n, Santiago de Compostela, Spain.ORCID 0000-0003-4456-6631
Beatriz Casal-AcciónScientific Advice Unit, Avalia-t. Galician Health Knowledge Agency, ACIS, Santiago de Compostela, Spain.ORCID 0000-0001-8655-9769
María Isolina Santiago-PérezDirectorate-General of Public Health, Galician Regional Health Authority, Epidemiology Department, Santiago de Compostela, Spain.ORCID 0000-0002-3931-7182
Leonor Varela-LemaDepartment of Preventive Medicine and Public Health, Universidade de Santiago de Compostela. Rúa San Francisco s/n, Santiago de Compostela, Spain.ORCID 0000-0001-8365-7961

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveSpin refers to reporting strategies that highlight the benefits of an experimental treatment or divert attention from nonsignificant primary outcomes. To assess spin in randomized clinic trials (RCTs) on pharmaceutical efficacy in multiple sclerosis (MS) and explore associated factors.

methodsA systematic literature search was conducted in MedLine (PubMed), EMBASE, and Cochrane using database-specific thesauri ("Multiple Sclerosis" and "Drug Therapy") to identify relevant studies. We included multiple sclerosis phase 3 and 4 randomized controlled trials with parallel, superiority designs that were published between 2013 and 2024 reporting nonsignificant primary outcomes. Spin was assessed in title, abstract conclusion, results, discussion, and conclusions. A descriptive analysis was followed by exploratory bivariate logistic regression. Independent variables included trial phase, sample size, drug type, comparison, follow-up time, registration, Consolidated Standards of Reporting Trials (CONSORT) mention, risk of bias (RoB2), journal quartile, first author affiliation, and conflict of interest.

resultsForty articles met inclusion criteria. Spin appeared in at least one section in 25 articles (62.5%) and in 3 or more in 19 articles (47.5%). The most frequent locations were abstract conclusions, discussion, and conclusions. Spin was significantly associated with smaller sample size (odds ratio [OR] = 7.00, 95% confidence interval [CI] = 1.29-37.91, p = 0.024), non-Q1 journals (OR = 4.38, 95% CI = 1.03-18.63, p = 0.046), and first author affiliation outside Europe or the United States (OR = 5.09, 95% CI = 1.15-22.62, p = 0.032).

interpretationSpin is common in MS randomized controlled trials with nonsignificant primary outcomes and may mislead clinical decisions. ANN NEUROL 2026;99:316-327.

Indexed as

Multiple SclerosisRandomized Controlled Trials as TopicHumans

Identifiers

PMID41586489
PMCPMC12894510

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.