Rigor Reviewed

Rigor-Reviewed Manuscript

Right C7 neurotomy at the intervertebral foramen plus intensive speech and language therapy versus intensive speech and language therapy alone for chronic post-stroke aphasia: multicentre, randomised controlled trial.

Name: Αlpha¹ Rigor Record — Right C7 neurotomy at the intervertebral foramen plus intensive speech and language therapy versus intensive speech and language therapy alone for chronic post-stroke aphasia: multicentre, randomised controlled trial.
Item: Right C7 neurotomy at the intervertebral foramen plus intensive speech and language therapy versus intensive speech and language therapy alone for chronic post-stroke aphasia: multicentre, randomised controlled trial.
Rating: 100
Author: Αlpha¹

Feng J, Hu R, Lyu M, Ma X, Li T, Meng Y, Qi W, Li H, Zhang Y, Ding S, Wang Z, Chen X, Zheng J, Fan Y, Ding L, Wang L, Wei Z, Zhu X, Guo M, Yang K, Chang W, Yang J, Xu M, Fang W, Liu Y, Qiu Y, Yin H, Jia J, Shen Y, Wang Y, Gu Y, Xu W

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Αlpha¹ Rigor Review — 2.75★ (Weak), 0 critical, 3 high issues for “Right C7 neurotomy at the intervertebral foramen plus intensive speech and language therapy versus intensive speech and language therapy alone for chronic post-stroke aphasia: multicentre, randomised controlled trial.”

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Αlpha¹ Editorial

This rigor review was examined and confirmed by Αlpha¹ Editorial · August 15, 2026

Αlpha¹ Rigor Review

Rigor Reviewed

2.75 / 5

Weak — serious problems found

Interventional Study

Critical

High-priority

How this rating was calculated▸

Started at 5★ — deductions

IntegrityIntegrity concern ×2−1★
ClaimsEfficacy rests on an unvalidated surrogate endpoint−0.5★
ClaimsTreatment effect not shown to be clinically meaningful−0.5★
CitationsUnresolved reference−0.25★

Model-reported confidence: highReviewer agreement: highEngine: 7.39.0Source: full text

Not verified in this report

The numeric-impossibility checks (GRIM/GRIMMER/DEBIT/SPRITE) did not run: 28 reported means were read, and their group size is not stated where the values are printed (this source has no machine-readable table structure). These checks need the count the mean was averaged over, so none was performed.

Problems surfaced6 types

Numerical inconsistencies1

Values that contradict each other or are impossible for the stated sample: recomputed p-values and test statistics, GRIM/GRIMMER checks on summary numbers, percentages against their own counts, totals against their parts, and estimates against their own confidence intervals.

Internal contradictions in the reported numbersAssessed

Overstated conclusions3

Conclusions that reach past what the paper's own results support — including a significance claim that no longer holds when the statistic is recomputed, and efficacy resting on an unvalidated surrogate endpoint.

Efficacy rests on an unvalidated surrogate endpointAssessed
Treatment effect not shown to be clinically meaningfulAssessed
Conclusions only partially backed by the presented evidenceAssessed

Data authenticity concerns1

An adversarial read for patterns associated with data that may not be genuine: results that look too clean, implausibly large effects, duplicated data or images, and methods that do not match the results reported.

Data look implausibly cleanAssessed

Broken references and links1

References checked against Crossref, OpenAlex and Retraction Watch for retractions and resolvability, plus declared data and code links probed for whether they resolve to content matching the paper.

References not resolvable to a published paperRecomputed

This Αlpha¹ Rigor Review uses AI Rigor Reviewers trained on a curated corpus of high-fidelity and retracted papers, with expert supervision and curation. It can still make mistakes; verify each finding against the source before relying on it.

This is a well-designed and transparently reported randomised controlled trial. The methodology is rigorous, with adequate randomisation, blinding of outcome assessors, sample size calculation, and statistical analysis. Minor reporting gaps include lack of explicit discussion of prior research limitations, no explicit mention of a reporting guideline, and threshold-only p-values for some outcomes.

Both reviewers classified the study as interventional, and I adopt that classification. The evaluation covered all eight dimensions; sub-criteria not applicable to a human surgical trial (e.g., species/strain, housing, cell line authentication) were excluded. The reviewers diverged slightly on the 'controls' sub-criterion in study design (one marked not applicable, the other reported and adequate) and on exact p_values in statistical analysis (one adequate, one inadequate); these were resolved by weighing the evidence, as detailed in the respective dimensions.

7 major claims checked against the paper's own evidence: 1 only partially supported (evidence backs part of the claim; gaps or caveats remain); the rest adequately supported.

Premise concern: surrogate not validated for clinical benefit; effect size not shown to be clinically meaningful.

Recomputed 5 tests: 5 consistent, 0 inconsistent; 5 via agent-written checks.

2 integrity concerns flagged (0 high).

Reporting

Eight Dimensions8 pass

The introduction cites epidemiological data on aphasia prevalence and economic burden, and describes the observation that patients with left-sided stroke and spastic arm paralysis often report improved language function after C7 nerve transfer surgery. This leads to the hypothesis that C7 neurotomy plus intensive SLT might have a cumulative effect. The paper acknowledges the challenge of treating chronic aphasia and the limitations of existing treatments, but does not explicitly discuss limitations of prior research in detail.

Sub-criteria

prior work citedADEQUATE

premise rationaleADEQUATE

limitations addressedINADEQUATE

Per reviewer (2) — the votes behind the verdict

PASSReviewer 1· 90% conf

The paper establishes a clear scientific premise, citing prior work on aphasia, C7 nerve transfer, and intensive SLT, and provides a logical rationale for the study hypothesis.

Evidence

direct quote[Introduction, paragraph 1-3]

“More than one third of people are estimated to experience aphasia during the initial acute stage of hemispheric stroke, and more than 60% continue to be affected for more than a year, referred to as chronic post-stroke aphasia.”