Related Experiment Video
Updated: Jul 25, 2026

Method of Studying Palatal Fusion using Static Organ Culture
Published on: September 19, 2015
Prevalence and Risk Factors for Obstructive Sleep Apnea Syndrome Among Children and Adolescents with Cleft lip and
A C H Ho1, F Savoldi1, R W K Wong2
1Orthodontics, Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR.
Insights
Obstructive sleep apnea syndrome (OSAS) risk affects 9.5%-13.6% of children with cleft lip/palate in Hong Kong. Clefts involving the embryonic secondary palate increase this risk, suggesting a need for multimodal assessment.
Area of Science:
- Pediatric pulmonology
- Craniofacial anomalies
- Sleep medicine
Background:
- Cleft lip and/or palate (CL/P) can lead to craniofacial abnormalities affecting airway development.
- Obstructive sleep apnea syndrome (OSAS) is a potential complication in children with CL/P, but prevalence data in Hong Kong is limited.
Purpose of the Study:
- To determine the prevalence of OSAS risk in Hong Kong children and adolescents with CL/P.
- To identify risk factors associated with OSAS in this population.
Main Methods:
- A retrospective survey study involving 351 children and adolescents (6-18 years) with non-syndromic CL/P.
- Utilized OSA-18, PSQ-22, and modified ESS questionnaires to assess OSAS risk.
- Analyzed age, sex, overweight, cleft type, and surgical history as potential risk factors.
Main Results:
- OSAS risk prevalence ranged from 9.5% (OSA-18) to 13.6% (PSQ-22).
- Higher OSAS risk was associated with younger age, clefts involving the embryonic secondary palate, and prior orthodontic treatment.
- Embryonic secondary palate involvement was the only significant risk factor identified (OR=3.7, p=0.015).
Conclusions:
- OSAS risk affects a notable percentage of children with CL/P in Hong Kong.
- Clefts involving the embryonic secondary palate are a key risk factor for OSAS in this group.
- A multimodal approach is recommended for OSAS risk assessment in children with CL/P.
Objective:
To investigate the prevalence of obstructive sleep apnea syndrome (OSAS) risk and related risk factors among children and adolescents of Hong Kong with cleft lip and/or palate (CL/P).
Design:
Retrospective survey study adopting three questionnaires, obstructive sleep apnea-18 (OSA-18), pediatric sleep questionnaire-22 (PSQ-22), and modified Epworth Sleepiness Scale (ESS).
Settings:
Multicenter study in two public hospitals.
Patients:
A total of 351 Chinese children and adolescents with non-syndromic CL/P (6-18-year-old, 57% males) visited between September 2017 and November 2019, with primary palatal repair surgery done before 3-year-old.
Main Outcome Measure:
Positive OSAS risk was determined based on cut-off ≥60 for OSA-18, ≥8 for PSQ-22, and >8 for ESS. Age, sex, overweight presence, cleft type, embryonic secondary palate involvement, palatal repair surgery, palatal revision surgery, and orthodontic treatment were analyzed as possible risk factors.
Results:
A total of 9.5% of patients had positive OSAS risk based on OSA-18, 13.6% based on PSQ-22, and 13.2% according to ESS. A higher prevalence of patients with positive OSAS risk was of younger age (OSA-18, p = .034), had cleft involving embryonic secondary palate (PSQ-22, p = .009), and history of fixed orthodontic treatment (ESS, p = .002). The regression model identified only involvement of embryonic secondary palate as a risk factor (PSQ-22, odds ratio = 3.7, p = .015).
Conclusions:
OSAS risk among children and adolescents of Hong Kong with CL/P was 9.5% to 13.6%. Patients at higher risk were those with cleft involving embryonic secondary palate. OSAS risk assessment may be influenced by different aspects of the disease spectrum, and a multimodal approach should be considered for such assessment.
More Related Videos
07:54Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea
Published on: December 6, 2016
08:03Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
Published on: November 4, 2025
Related Concept Videos
Cystic Fibrosis: Pathogenesis
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
Chronic Obstructive Pulmonary Disease
Smoking is a primary risk factor for COPD, with over 80% of patients having a history of it. Patients typically experience progressive dyspnea or labored breathing, frequent coughing, and recurrent pulmonary infections. Many eventually succumb to respiratory failure, characterized by...
Other Pulmonary Disorders
Sleep Apnea
The condition is more prevalent among...
Cardiopulmonary Resuscitation II: ACLS Airway Management