ArticleBMC medicine2026
PCDSOS: a novel clinical predictive tool for screening primary ciliary dyskinesia in adult bronchiectasis patients-a multicenter derivation and external validation study.
Article in BMC medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundPrimary ciliary dyskinesia (PCD) is a rare but underdiagnosed genetic cause of adult bronchiectasis, with current predictive tools (e.g., PICADAR, NA-CDCF) primarily validated in children and lacking adult-specific predictors (e.g., subfertility). This study aimed to develop and validate a practical tool (PCDSOS) for PCD screening in adult bronchiectasis.
methodsDerivation group (n = 287) from Peking Union Medical College Hospital (2013-2025) and validation group (n = 107) from The Second Xiangya Hospital (2016-2024) were included. All patients completed ≥ 1 PCD diagnostic test (nasal nitric oxide, whole-exome sequencing, transmission electron microscopy, or high-speed video microscopy analysis). Logistic regression was used to develop PCDSOS, with performance assessed by AUC, calibration curve, and decision curve analysis.
resultsExisting tools showed reduced accuracy in adults (AUC: 0.76-0.85 vs. 0.84-0.98 in original studies). PCDSOS included 6 predictors: pulmonary atelectasis/lobectomy in middle lobe/lingula (P, 2 points), neonatal chest symptoms (C, 2 points), organ laterality defects (D, 5 points), chronic sinusitis (S, 2 points), chronic otitis media/hearing loss from childhood (O, 1 point), and subfertility (S, 1 point). At cutoff = 3, PCDSOS had sensitivity 0.86, specificity 0.76 (derivation cohort, AUC = 0.90) and sensitivity 0.90, specificity 0.67 (validation cohort, AUC = 0.92). A free web-based version of PCDSOS for automated scoring is available to facilitate clinical application.
conclusionsPCDSOS outperforms existing tools in adult bronchiectasis, providing a cost-effective screening strategy to identify patients requiring further PCD diagnostic testing-critical for preventing irreversible lung damage and guiding genetic counseling.
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