Time restricted eating and exercise training before and during pregnancy for people with increased risk of gestational diabetes: single centre randomised controlled trial (BEFORE THE BEGINNING).

Name: Αlpha¹ Rigor Record — Time restricted eating and exercise training before and during pregnancy for people with increased risk of gestational diabetes: single centre randomised controlled trial (BEFORE THE BEGINNING).
Item: Time restricted eating and exercise training before and during pregnancy for people with increased risk of gestational diabetes: single centre randomised controlled trial (BEFORE THE BEGINNING).
Rating: 59
Author: Αlpha¹

Sujan MJ, Skarstad HM, Rosvold G, Fougner SL, Follestad T, Salvesen KÅ, Moholdt T

Paper source

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Αlpha¹ Rigor Review — 3.25★ (Adequate), 0 critical, 2 high issues for “Time restricted eating and exercise training before and during pregnancy for people with increased risk of gestational diabetes: single centre randomised controlled trial (BEFORE THE BEGINNING).”

Links back to this Rigor Record.

Αlpha¹ Editorial

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

Αlpha¹ Rigor Review

Rigor Reviewed

3.25 / 5

Adequate — real issues to address

Interventional Study

Critical

High-priority

How this rating was calculated▸

Started at 5★ — deductions

IntegrityIntegrity concern ×3−1.5★
StatisticsPrinted percentage does not match its own count (capped)−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: 12 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 surfaced2 types

Numerical inconsistencies2

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.

Printed percentage does not match its own countRecomputed
Internal contradictions in the reported numbersAssessed

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-conducted and transparently reported randomised controlled trial of a prepregnancy lifestyle intervention. The main methodological strengths are the rigorous randomisation, pre-specified sample size, detailed statistical methods, and open data/code availability. The primary weakness is the lack of an explicit informed consent statement, and there are minor reporting and copyedit issues.

Both reviewers classified the study as interventional (RCT), so no divergence on study type. The statistics verification covered only 5 tests (those with test statistics/df or effect estimates with CIs); the remaining analyses (e.g., bootstrap, exact tests) were not machine-verified and should not be assumed correct. The citation check found no retracted or unresolved references. The reproducibility check confirmed the Zenodo link is live.

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

Recomputed 4 tests: 4 consistent, 0 inconsistent; 4 via agent-written checks. 1 printed percentage that does not match its own count.

3 integrity concerns flagged (0 high).

Reporting

Eight Dimensions8 pass

The introduction cites multiple relevant studies (RADIEL, UPBEAT, LIMIT, Prepare) and systematic reviews, and it explicitly notes the lack of evidence on specific prepregnancy intervention components. The hypothesis follows logically from the cited evidence that prepregnancy lifestyle changes may improve glycaemic control. The paper also addresses limitations of prior research by highlighting the missed window of opportunity in pregnancy and the need for prepregnancy interventions.

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 by citing prior research on GDM risk factors, lifestyle interventions, and the rationale for a prepregnancy intervention, and it acknowledges gaps in existing evidence.

Evidence

direct quote[Introduction, paragraphs 2-4]

“The Finnish Gestational Diabetes Prevention Study (RADIEL) showed that a diet and exercise intervention started before 20 weeks of gestation could reduce the incidence of GDM by 39% in those at high risk. In contrast, some large lifestyle intervention trials, such as the UPBEAT study and the LIMIT trial, did not show the effectiveness of a diet and exercise intervention in pregnancy for GDM prevention.”