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  • Title: 24-Hour Ambulatory Blood Pressure Variability in Children with Obstructive Sleep Apnea.
    Author: Kang KT, Chiu SN, Weng WC, Lee PL, Hsu WC.
    Journal: Laryngoscope; 2021 Sep; 131(9):2126-2132. PubMed ID: 33599298.
    Abstract:
    OBJECTIVE: To evaluate blood pressure (BP) variability in 24-hour ambulatory BP monitoring in children with obstructive sleep apnea (OSA). STUDY DESIGN: Case series study. METHODS: Children aged 4 to 16 years with clinical symptoms were recruited in a tertiary medical center. Overnight polysomnography and 24-hour recordings of ambulatory BP were performed for each child. The severity of OSA was classified as primary snoring (apnea-hypopnea index [AHI] < 1), mild OSA (1 ≤ AHI < 5), moderate OSA (10 > AHI ≥ 5), and severe OSA (AHI ≥ 10). The standard deviation of mean BP was used as an indicator of BP variability. RESULTS: A total of 550 children were included (mean age: 7.6 years; 70% were boys; 20% were obese). Compared with the children with primary snoring, children with severe OSA exhibited significantly higher nighttime systolic BP (108.0 vs. 100.5 mmHg, P < .001), nighttime diastolic BP (58.9 vs 55.6 mmHg, P = .002), nighttime mean arterial pressure (75.3 vs. 70.5 mmHg, P < .001), nighttime systolic BP load (40.5% vs. 25.0%, P < .001), nighttime diastolic BP load (25.3% vs. 12.9%, P < .001), and nighttime systolic BP variability (11.4 vs. 9.6, P = .001). Multiple linear regression analyses revealed an independent association between AHI and nighttime systolic BP variability (regression coefficient = 0.31, 95% CI = 0.06-0.56, P = .015) after adjustment for age, gender, adiposity, and hypertensive status. CONCLUSIONS: OSA in children is associated with increased BP and BP variability. LEVEL OF EVIDENCE: 4 Laryngoscope, 131:2126-2132, 2021.
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