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Sunday, February 20, 2022

Assessment of Laryngopharyngeal Reflux and Obstructive Sleep Apnea: A Population‐Based Study

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Objectives/Hypothesis

To evaluate the presence of laryngopharyngeal reflux (LPR) and the potential association between presence of LPR symptoms and obstructive sleep apnea (OSA) in a representative sample from a population-based study.

Study Design

Cross-sectional study.

Methods

Participants of the follow-up of the Epidemiological Sleep Study were evaluated. Sleep was assessed through questionnaires and polysomnography. The presence of LPR was based on the questionnaire Reflux Score Index (RSI), and scores higher than 13 were suggestive of LPR. A general linear model test was used for comparison of continuous data and Pearson's chi-square test was used to compare categorical variables. Predictors of LPR were obtained by regression analysis.

Results

701 were enrolled (54.8% female, 45.2% male; mean age, 50.2 ± 13.3 years). The mean apnea-hypopnea index score was 17 ± 18.3 events/hr, and the mean RSI score was 7.0 ± 8.1. LPR was found in 17% of the volunteers, whereas OSA was present in 38.5% of the sample. Specifically, in those patients with OSA, the prevalence of LPR was 45.4%; however, there was no statistically significant association between LPR and the presence of OSA. The severity of OSA was not associated with RSI score. The presence of LPR was associated with older age, smoking, excessive daytime sleepiness and worse quality of life and sleep scores questionnaires.

Conclusions

Age, smoking, but not body mass index, were associated with LPR. There was not statistically significant association of LPR with OSA. Individuals with symptoms of LPR had greater drowsiness and worse quality of life and sleep.

Level of Evidence

3 Laryngoscope, 2022

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