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  • Title: Predictors of Behavioral Changes After Adenotonsillectomy in Pediatric Obstructive Sleep Apnea: A Secondary Analysis of a Randomized Clinical Trial.
    Author: Isaiah A, Spanier AJ, Grattan LM, Wang Y, Pereira KD.
    Journal: JAMA Otolaryngol Head Neck Surg; 2020 Oct 01; 146(10):900-908. PubMed ID: 32880655.
    Abstract:
    IMPORTANCE: Adenotonsillectomy (AT) is associated with improved behavior in children with obstructive sleep apnea (OSA). However, it is unknown whether polysomnographic parameters are superior to the parent-reported severity of sleep-disordered breathing (SDB) in predicting behavioral changes after AT. OBJECTIVE: To ascertain whether polysomnographic parameters vs parent-reported severity of SDB are better predictors of treatment-related behavioral changes in children with OSA. DESIGN, SETTING, AND PARTICIPANTS: This ad hoc secondary analysis of the Childhood Adenotonsillectomy Trial (CHAT) downloaded and analyzed data from January 1 to January 31, 2020. Children aged 5 to 9 years with a polysomnographic diagnosis of OSA were enrolled in the CHAT and subsequently randomized to undergo either early AT or watchful waiting with supportive care. All outcome measures were obtained at baseline and at follow-up (7 months after randomization). INTERVENTIONS: Early AT vs watchful waiting with supportive care. MAIN OUTCOMES AND MEASURES: Postrandomization changes between the baseline and follow-up periods were derived from (1) T scores in 4 validated behavioral assessments (Conners Global Index parent and teacher versions, Behavior Rating Inventory of Executive Function metacognition index, and Child Behavior Checklist of total, internalizing, and externalizing behavior subscales); (2) 8 aggregated polysomnographic parameters representing the severity of obstruction, hypoxemia, sleep quality, and structure; and (3) the parent-reported severity of SDB measured by the Pediatric Sleep Questionnaire-Sleep-Related Breathing Disorder (PSQ-SRBD) scale. The treatment-related changes in each of the behavioral outcomes attributable to changes in SDB severity (represented by the subjective PSQ-SRBD score and objective polysomnographic parameters) were measured and compared using mediation analysis. RESULTS: A total of 453 children were assessed at baseline, of whom 234 were girls (52%) and the mean (SD) age was 6.6 (1.4) years. The postrandomization changes in 7 of 8 behavioral outcome measures between the baseline and follow-up periods were partially mediated by the changes in PSQ-SRBD scores (range of nonzero causally mediated effects, 2.4-3.5), without contribution from any of the polysomnographic parameters. CONCLUSIONS AND RELEVANCE: This secondary analysis of a national randomized clinical trial found that most treatment-related behavioral changes in children with OSA were mediated by the changes in parent-reported SDB severity alone. These findings suggest that polysomnographic parameters provide clinicians with limited means to predict the improvement in neurobehavioral morbidity in OSA. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT00560859.
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