Habitual snoring coexisting with respiratory allergies in children: Prevalence and impact on quality of life extending beyond primary snoring.

Background: Children who have respiratory allergies are more likely to experience sleep disturbances. Persistent sleep-disordered breathing directly contributes to poor symptom control for asthma and allergic rhinitis, including deterioration in quality of life. This study aimed to investigate the prevalence, risk factors of habitual snoring, and the correlation between 18-item obstructive sleep apnea (OSA-18) scores and the level of asthma and allergic rhinitis (AR) symptoms control for habitual snorers with respiratory allergies. Material and methods: A cross-sectional design was conducted on Thai children aged 2 to 15 who were diagnosed with asthma and AR in a respiratory allergy clinic at the Medical Education Center. The Pediatric Sleep Questionnaire was used to determine the prevalence of habitual snoring. Patients with habitual snoring completed the OSA-18 quality of life questionnaire, which was divided into 5 subscales: sleep disturbance, physical symptoms, emotional distress, daytime function, and caregiver concerns. Symptom control for asthma and AR was evaluated according to the Global Initiative for Asthma (GINA) guidelines and the Visual Analog Scales (VAS), respectively. Multivariable logistic regression models and adjusted odds ratios were used to assess associations. Results: A total of 565 participants were enrolled, and 363 (64.2%) were male. Habitual snoring had the highest prevalence of sleep-disordered breathing in 29.6% of patients with respiratory allergies. Patients with poorly controlled symptoms had a significantly higher risk of habitual snoring than well controlled symptoms for AR (52.0% vs 19.1%, adjusted Odds Ratio: aOR 4.39, 95%CI 2.25-8.58, p < 0.001) and for asthma concomitant with AR (54.9% vs. 18.8%, aOR 5.18, 95%CI 2.52-10.68, p < 0.001). Habitual snorers with poorly controlled asthma negatively affected their quality of life more than those with well controlled asthma (37.7% vs 13.3%, p = 0.005), as did patients with underlying AR (46.2% vs 22.9%, p = 0.002). In comparison to habitual snorers with well controlled symptoms, those with poorly controlled symptoms for respiratory allergies had higher mean the OSA-18 scores across all subscales. Conclusion: Nearly one-third of children with respiratory allergies develop habitual snoring. Poorly controlled symptoms of asthma and allergic rhinitis raise the possibility of developing habitual snoring. Their quality of life and caregivers were shown to be affected just as negatively as those with obstructive sleep apnea (OSA) syndrome.