Prenatal Ultrasound PAS Score Validation Against Surgical Outcomes

Steven Fong's 2026 figshare study validates a prenatal ultrasound-based Placenta Accreta Spectrum (PAS) scoring system. It analyzes diagnostic accuracy against the FIGO intraoperative classification and maternal-neonatal outcomes for 122 pregnancies suspected of PAS. The dataset contains metrics like sensitivity, specificity, AUC, and associations between PAS stages and surgical outcomes.

Use Cases

• Validate PAS score diagnostic accuracy using metrics like sensitivity (83.5%), specificity (100%), and AUC (0.918).
• Associate increasing PAS stages with surgical outcomes such as operative duration and intraoperative blood loss.
• Analyze the prognostic value of PAS scores for neonatal outcomes, including NICU admission rate (13.9%).
• Evaluate rule-in performance (PPV 100%) and rule-out limitations (NPV 41.9%) of the scoring system for clinical planning.

Strengths

• Diagnostic accuracy metrics are reported with precise values (e.g., overall accuracy 85.3%, AUC 0.918).
• Analysis is based on a cohort of 122 pregnancies with suspected PAS.
• Statistical significance (p-values) is provided for associations between PAS stages and key outcomes.

Limitations

• The dataset is small (3.9 MB) and likely contains summary statistics rather than raw patient-level data.
• The study is from a single tertiary referral center, which may limit generalizability.
• Sample size of 122 pregnancies may be insufficient for highly granular subgroup analyses.

Provenance

Source

Steven Fong via figshare.

Collection Method

Retrospective cohort study at a tertiary referral center.

Freshness

Last updated in April 2026.

Geography

Single tertiary referral center (location unknown).