Limitations This single-case report has inherent limitations. Observations from one patient cannot establish treatment efficacy or disease patterns. The aggregated 12 cases from different centers precl

The gap

Consensus across the literature

Supporting evidence — 3 representative gaps

• Thromboelastography combined with conventional coagulation parameters for developing a nomogram model to predict postpartum hemorrhage risk: A retrospective analysis (2026) · doi

  Second, Recommendations: Future multicenter, prospective studies with larger and more diverse populations are warranted to further validate and refine the applicability of this study performed only internal validation using bootstrap to resampling, necessitating confirm the predictive accuracy of this model across different clinical settings and populations.

  Keywords: populations second recommendations future multicenter prospective larger diverse warranted further validate refine applicability performed internal
• Case report: TTMV::RARA-positive pediatric APL with spinal cord compression as initial presentation: unique clinical features and therapeutic outcomes revealed by a 12-case systematic cohort analysis (2026) · doi

  Limitations This single-case report has inherent limitations. Observations from one patient cannot establish treatment efficacy or disease patterns. The aggregated 12 cases from different centers preclude statistical analysis. Our 10-month follow-up is insufficient for long- term outcome assessment, and optimal treatment strategies remain undefined without prospective validation.

  Keywords: limitations treatment single case report inherent observations patient cannot establish cacy disease patterns aggregated cases
• Development and internal validation of a nomogram for predicting short-term functional improvement after pharmacological treatment in severe symptomatic lumbar disk herniation (2026) · doi

  This study has several limitations. First, the analysis was based on a relatively small sample from a parent randomized trial designed for treatment comparison, not for prediction modeling, so overfitting and predictor instability cannot be excluded. Variable selection was guided by clinical rationale and the EPV principle, using stepwise regression to reduce model complexity; however, some optimism bias may remain, and the model should be considered hypothesis-generating, requiring validation in larger, multicenter cohorts. Second, only internal bootstrap validation was performed, and no external cohort was available, limiting generalizability. Third, follow-up was restricted to 14 days, so the

  Keywords: model validation several limitations first based relatively small sample parent randomized trial designed treatment comparison