Kaimen Rigor reviewed

Rigor-Reviewed Manuscript

Collagenase Injection versus Limited Fasciectomy for Dupuytren's Contracture.

Name: Kaimen Rigor review — Collagenase Injection versus Limited Fasciectomy for Dupuytren's Contracture.
Item: Collagenase Injection versus Limited Fasciectomy for Dupuytren's Contracture.
Rating: 39
Author: Alpha1

Dias J, Tharmanathan P, Arundel C, Welch C, Wu Q, Leighton P, Armaou M, Johnson N, James S, Cooke J, Bainbridge L, Craigen M, Warwick D, Brady S, Flett LG, Jones J, Knowlson CN, Watson M, Keding A, Hewitt CE, Torgerson D

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Kaimen Rigor review — 1★ (Critical), 2 critical, 3 high issues for “Collagenase Injection versus Limited Fasciectomy for Dupuytren's Contracture.”

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Alpha1 Editorial

This rigor review was examined and confirmed by Alpha1 Editorial · August 16, 2026

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Collagenase Injection versus Limited Fasciectomy for Dupuytren's Contracture.

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DOI

10.1056/NEJMoa2312631

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Issued Aug 16, 2026Engine 7.39.0

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Kaimen Rigor reviewed

Rigor-Reviewed Manuscript

Collagenase Injection versus Limited Fasciectomy for Dupuytren's Contracture.

Paper source

Collagenase Injection versus Limited Fasciectomy for Dupuytren's Contracture.

Read full text (PMC)

Embed this Rigor badge

Links back to this Kaimen Rigor review.

Alpha1 Editorial

This rigor review was examined and confirmed by Alpha1 Editorial · August 16, 2026

Kaimen Rigor review

Kaimen Rigor reviewed

1 / 5

Critical — a demonstrable failure

Interventional Study

Critical

High-priority

How this rating was calculated▸

Started at 5★ — deductions

StatisticsImpossible or misreported statistic ×4−4★
IntegrityIntegrity concern−0.5★
StatisticsPrinted percentage does not match its own count (capped) ×4−0.25★
ReportingData & code availability partially met−0.25★
CitationsUnresolved reference−0.25★

A demonstrable critical failure caps the rating at the minimum, regardless of the deductions above.

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: 14 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.
No data or code availability links were detected to verify.

Biggest issues4 demonstrable

01Printed percentage does not match its own countdemonstrable
criticalArithmeticrecomputedFull detail
8% does not match the reported count 26/178
“26/178 (8.0%)”
Find in source
02Printed percentage does not match its own countdemonstrable
criticalArithmeticrecomputedFull detail
1.7% does not match the reported count 5/149
“5/149 (1.7%)”
Find in source
03Printed percentage does not match its own countdemonstrable
criticalArithmeticrecomputedFull detail
8% does not match the reported count 26/178
“26/178 (8.0%) patients in the collagenase group”
ResultsFind in source
04Printed percentage does not match its own countdemonstrable
criticalArithmeticrecomputedFull detail
1.7% does not match the reported count 5/149
“5/149 (1.7%) participants in the limited fasciectomy group”
ResultsFind in source
05Printed percentage does not match its own count
mediumArithmeticrecomputedFull detail
82.6% does not match the reported count 196/237
“Limited fasciectomy n=237 82.6%”
ResultsFind in source
06Printed percentage does not match its own count
mediumArithmeticrecomputedFull detail
96.5% does not match the reported count 285/295
“96.5% of limited fasciectomy participants”
ResultsFind in source

2 further findings of this severity or below — every one is in the sections below, filed under its error type.

Findings by category

301ArithmeticNumerical inconsistencies 102OverreachOverstated conclusions 03AuthenticityNone found 104DisclosureReporting gaps 105AvailabilityBroken references and links · partly checked 06Copyedit6 minor suggestions

This Kaimen Rigor review uses Kaimen 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-conducted and well-reported randomized non-inferiority trial with rigorous design, clear ethical approvals, and appropriate statistical methods. The main weakness is the vague data availability statement, which lacks a concrete access mechanism, and a few minor reporting inconsistencies.

Both reviewers independently scored all eight dimensions and agreed on all statuses, so no divergence needed reconciliation. The statistics verification component could not recompute any of the 8 checked tests because they are model-based estimates or threshold p-values, which is expected and not a deficiency. The citation check found one reference not found in any registry, which is flagged as a potential fabrication signal.

Numerical inconsistencies

3 findings · worst critical

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.

Summary statistic impossible for the stated N (GRIM/GRIMMER)Recomputed
Printed percentage does not match its own countRecomputed
Internal contradictions in the reported numbersAssessed

4 reported summary statistics mathematically impossible for the stated N (PERCENT). 4 printed percentages that do not match their own count.

Overstated conclusions

1 finding · worst low

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.

Conclusions only partially backed by the presented evidenceAssessed

6 major claims checked against the paper's own evidence: 2 only partially supported (evidence backs part of the claim; gaps or caveats remain); the rest adequately supported.

Efficacy claim is anchored to an adequate endpoint and a meaningful effect.

Data authenticity concerns

None found

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.

Checked — nothing surfaced.

Reporting gaps

1 finding · worst medium

Required detail the manuscript never states — study design, biological variables, ethics approval and consent, key resources, statistical reporting, data and code availability, and overall transparency.

Data/code availability incompleteAssessed

Eight Dimensions7 pass · 1 warn

The introduction cites prior studies on collagenase versus placebo and notes the lack of direct comparative evidence. The rationale for the trial is logically derived from this gap, and the non-inferiority design is justified by the potential benefits of collagenase (clinic administration, cost savings, quicker recovery). Limitations of prior research are implicitly addressed by the trial's design, though not explicitly discussed.

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 by citing prior research on both treatments and justifying the need for a head-to-head comparison.

Evidence

“Collagenase was shown to be better than placebo in correcting the contracture to 0-5 degrees at 30 days.”

Introduction ¶2Find in source

“Evidence comparing these treatments is limited.”

IntroductionFind in source

“The benefits of collagenase treatment include its administration in a clinic instead of an operating room, potential cost savings – and a quicker recovery time compared to limited fasciectomy.”

Introduction ¶2Find in source

PASSReviewer 2· 90% conf

The paper establishes a clear scientific premise with prior work cited and a logical rationale for the trial.

Evidence

“Collagenase was shown to be better than placebo in correcting the contracture to 0-5 degrees at 30 days.”

Introduction ¶2Find in source

“Evidence comparing these treatments is limited.”

IntroductionFind in source

“We assumed that this difference in score (6 points) represents the minimum threshold at which changes in hand function become appreciated by patients.”

Collagenase Injection versus Limited Fasciectomy for Dupuytren's Contracture.

Collagenase Injection versus Limited Fasciectomy for Dupuytren's Contracture.

Numerical inconsistencies

Overstated conclusions

Data authenticity concerns

Reporting gaps

Broken references and links

Copyediting

Numerical inconsistencies

Overstated conclusions

Data authenticity concerns

Reporting gaps

Broken references and links

Copyediting