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Anatomical Phenotype of Obstructive Sleep Apnea (OSA) Patients Based on Cluster Analysis.
Orthodontics & Craniofacial Research 2023 March 16
OBJECTIVES: To generate a novel subtype of obstructive sleep apnea (OSA) based on anatomical features and verify the differences in the response of different subtypes to orthodontic treatment, thus providing a theoretical reference for clinical decision-making.
MATERIALS AND METHODS: A K-means cluster analysis was performed for this retrospective serial study, which includes 722 OSA patients, aged 44.0(36.0, 54.0) years, 80.2% male, with apnea-hypopnea index (AHI) of 23.2(13.4,39.6) events·h-1 , and body mass index (BMI) of 25.47±3.00kg·m-2 . All samples were divided into three subtypes based on AHI, BMI, and five variables of craniofacial measurements. 67 cases with mandibular advancement devices (MAD) therapeutic results were further applied to validate the efficacy and side effects of this treatment in different subtypes.
RESULTS: 230 patients (31.9%) were characterized as Cluster 1: AHI of 17.65 (11.80,30.42) events·h-1 , BMI of 23.65±2.62 kg·m-2 , with skeletal Class II high-angle shape. Cluster 2 included 278 patients (38.5%): AHI of 17.00 (11.00,26.48) events·h-1 , BMI of 25.36±2.53 kg·m-2 , soft palate length (SPL) of 39.25 mm (36.12,42.20), with basically normal skeleton and normal airway size. Cluster 3, consisting of 214 patients (29.6%), exhibited a combination of anatomical deformity and obesity, with the highest AHI and BMI of 45.35(30.42,62.53) events·h-1 and 27.57±2.59 kg·m-2 respectively, but less deformity degree than Cluster 1. Cluster 2 had the highest response rate and relatively mild side effects with MAD.
CONCLUSIONS: Orthodontic treatment based on anatomical morphology could exert a better effect in mild-moderate OSA patients with mild skeletal deformity.
MATERIALS AND METHODS: A K-means cluster analysis was performed for this retrospective serial study, which includes 722 OSA patients, aged 44.0(36.0, 54.0) years, 80.2% male, with apnea-hypopnea index (AHI) of 23.2(13.4,39.6) events·h-1 , and body mass index (BMI) of 25.47±3.00kg·m-2 . All samples were divided into three subtypes based on AHI, BMI, and five variables of craniofacial measurements. 67 cases with mandibular advancement devices (MAD) therapeutic results were further applied to validate the efficacy and side effects of this treatment in different subtypes.
RESULTS: 230 patients (31.9%) were characterized as Cluster 1: AHI of 17.65 (11.80,30.42) events·h-1 , BMI of 23.65±2.62 kg·m-2 , with skeletal Class II high-angle shape. Cluster 2 included 278 patients (38.5%): AHI of 17.00 (11.00,26.48) events·h-1 , BMI of 25.36±2.53 kg·m-2 , soft palate length (SPL) of 39.25 mm (36.12,42.20), with basically normal skeleton and normal airway size. Cluster 3, consisting of 214 patients (29.6%), exhibited a combination of anatomical deformity and obesity, with the highest AHI and BMI of 45.35(30.42,62.53) events·h-1 and 27.57±2.59 kg·m-2 respectively, but less deformity degree than Cluster 1. Cluster 2 had the highest response rate and relatively mild side effects with MAD.
CONCLUSIONS: Orthodontic treatment based on anatomical morphology could exert a better effect in mild-moderate OSA patients with mild skeletal deformity.
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