The Pakistan Palatal Fistula Difficulty Index (PPFDI): Development and Initial Validation of a Novel Scoring Index for Surgical Complexity and Referral Guidance
Year: 2025
Type: article
Abstract: Palatal fistulae remain the most common complication following cleft palate repair, with recent studies reporting incidence rates ranging from 2% to 35%. Existing classification systems offer limited guidance on surgical complexity or referral pathways. This study developed and validated the Pakistan Palatal Fistula Difficulty Index (PPFDI), a novel scoring system designed to quantify fistula complexity based on 6 domains: location, size, configuration, number of fistulae, recurrence history, and velopharyngeal function. A 3-tiered framework was proposed to guide referral based on complexity level and surgeon experience. Each domain was scored on a 3-point ordinal scale, yielding a total score range of 6 to 18. Content and face validity were established through a modified Delphi process involving 30 expert cleft surgeons, with all 6 domains achieving ≥70% agreement. Inter-rater reliability was assessed using standardized, anonymized clinical case files (n=30) independently scored by 4 senior cleft surgeons. The PPFDI demonstrated strong inter-rater reliability (ICC=0.87, 95% CI: 0.87-0.95), with domain-specific ICCs ranging from 0.78 to 0.92. The mean PPFDI score was 11.1 (SD=2.9), with 43.3% of cases classified as high complexity (score ≥12). Agreement between PPFDI-informed referral tier and clinician-determined referral need was 91.7% (Cohen kappa=0.81), indicating excellent alignment. The PPFDI offers a reliable and clinically meaningful method to stratify palatal fistula complexity and may support more structured decision-making in both low-resource and high-resource settings. Further validation through multicenter studies and correlation with surgical outcomes is warranted to confirm its broader clinical applicability.
Source: Journal of Craniofacial Surgery
Institutions: King Edward Medical University, University of Southern California, National Institute of Child Health, Lehigh Valley Health Network, Lehigh Valley Hospital, Icahn School of Medicine at Mount Sinai, University of Colorado Hospital, Children's Hospital Colorado, University of Colorado Anschutz, Children's Hospital of Philadelphia, Amsterdam University Medical Centers
Language: English
Subfield: Genetics
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W4414451960