Rigor Reviewed

Rigor-Reviewed Manuscript

Low-plastic diet and urinary levels of plastic-associated phthalates and bisphenols: the randomized controlled PERTH Trial.

Name: Αlpha¹ Rigor Record — Low-plastic diet and urinary levels of plastic-associated phthalates and bisphenols: the randomized controlled PERTH Trial.
Item: Low-plastic diet and urinary levels of plastic-associated phthalates and bisphenols: the randomized controlled PERTH Trial.
Rating: 59
Author: Αlpha¹

Harray AJ, Lucas AD, Herrmann SE, Vlaskovsky PS, Elagali A, Seewoo BJ, Chan DC, Chiarugi D, Kulkarni R, Trevenen M, Wang X, Mueller J, Thomas KV, Papendorf H, Miller C, Gaudieri S, Smith T, Salman S, Murray K, Symeonides C, Dunlop SA, Watts GF, PERTH Trial Consortium, Lucas M

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Αlpha¹ Rigor Review — 1★ (Critical), 0 critical, 10 high issues for “Low-plastic diet and urinary levels of plastic-associated phthalates and bisphenols: the randomized controlled PERTH 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

1 / 5

Critical — serious problems across many checks

Mixed Methods

Critical

High-priority

How this rating was calculated▸

Started at 5★ — deductions

IntegrityIntegrity concern ×3−1.5★
CitationsCitations & links (capped) ×10−1★
ClaimsEfficacy rests on an unvalidated surrogate endpoint−0.5★
ClaimsTreatment effect not shown to be clinically meaningful−0.5★
ReportingStudy design partially met−0.25★
ReportingStatistical analysis partially met−0.25★

Citations & links are capped at −1★ combined, however many are flagged.

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

Not verified in this report

Statistics were not checked: no recomputable values were found in this text — no test statistic reported with its degrees of freedom, no effect estimate printed with both a 95% CI and a p-value, and no percentage printed with both its count and its denominator.

Problems surfaced7 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 conclusions2

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

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.

Methods and results do not matchAssessed

Reporting gaps2

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.

Statistical reporting gaps (tests, assumptions, effect sizes)Assessed
Study-design details incomplete (controls, blinding, power)Assessed

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.

The paper is a well-conducted mixed-methods study (cohort + pilot RCT) with strong scientific premise, clear ethics, and transparent reporting. The main weaknesses are the lack of a formal power analysis, incomplete reporting of randomization/blinding details, and imprecise p-value reporting with no multiple-comparison correction.

Both reviewers classified the study as mixed (observational + interventional), which was adopted. The statistics verification component could not recompute any tests (total=0) due to limited reporting of test statistics and CIs, so mathematical correctness is not confirmed. The citation check flagged 10 references not found in registries, which are integrity concerns.

7 major claims checked against the paper's own evidence: all adequately supported.

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

3 integrity concerns flagged (0 high).

Reporting

Eight Dimensions6 pass · 2 warn

The introduction cites numerous epidemiological studies linking phthalates and bisphenols to adverse health outcomes, and identifies gaps in prior intervention research (small samples, short durations, single-food focus). The rationale for minimizing all plastic touchpoints is clearly linked to the study objectives. Limitations of prior work are explicitly acknowledged and addressed by the study design.

Sub-criteria

prior work citedADEQUATE

premise rationaleADEQUATE

limitations addressedADEQUATE

Per reviewer (2) — the votes behind the verdict

PASSReviewer 1· 90% conf

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

Evidence

direct quote[Introduction, paragraphs 1-3]

“numerous epidemiological studies have reported associations between exposure to these PACs and adverse health outcomes, including cardiovascular disease and metabolic syndrome”