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Sample / illustrative report only — fictional neuro-oncology manuscript for UI demo. Not a real patient case, not a journal decision. Upload your own manuscript to receive a real review.
ANALYSIS REPORTFictional sample14.06.2026

Extent of Resection and Early Progression in Newly Diagnosed Supratentorial Glioblastoma: A Multicenter Retrospective Cohort (2016–2022)

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This is a concise overview. Switch to Full evaluation (Detailed) above for the complete report.

Key Points

  • 1Multicenter retrospective cohort linking imaging-based extent of resection (EOR) to early progression-free survival in glioblastoma.
  • 2Strengths include large n and multivariable adjustment; limitations include residual confounding, heterogeneous imaging protocols, and immortal time risks around re-resection documentation.

Major Issues

Methods: EOR is derived from local radiology reads without fully described blinding or central adjudication; inter-site measurement drift could bias category assignment.
Methods / Statistics: Immortal time and indication bias around second resections and salvage therapies are mentioned only briefly; the analytic timeline relative to progression ascertainment should be diagrammed.
Results: Missing MGMT data are handled via a missing indicator but the proportion missing per centre is not shown; residual confounding may concentrate in high-missing sites.
Discussion: Causal language occasionally overstates what observational HRs support; tighten wording and add E-values or quantitative bias analysis for the primary association.

Priority Action Plan

HIGH IMPACT

Problem

Clarify temporality and address immortal time with a diagram + landmark sensitivity analysis.

Why it matters

Core threat to validity for surgery–outcome observational studies.

Suggested fix

Clarify temporality and address immortal time with a diagram + landmark sensitivity analysis.

HIGH IMPACT

Problem

Strengthen EOR ascertainment (central review plan or reliability data).

Why it matters

Exposure misclassification directly attenuates or distorts hazard ratios.

Suggested fix

Strengthen EOR ascertainment (central review plan or reliability data).

MEDIUM IMPACT

Problem

Soften causal language; add E-values or quantitative bias analysis for the primary HR.

Why it matters

Aligns claims with observational evidence strength.

Suggested fix

Soften causal language; add E-values or quantitative bias analysis for the primary HR.

Quick win: Prioritize a cohort timeline figure, landmark/negative-control analyses for immortal time, and clearer EOR ascertainment. Tighten causal wording and enrich the abstract with absolute risk metrics.

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