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Chest. 2008 Nov;134(5):919-924. doi: 10.1378/chest.08-0847. Epub 2008 Aug 27.

Daytime sleepiness relates to snoring independent of the apnea-hypopnea index in women from the general population.

Author information

1
Department of Surgical Sciences, Otorhinolaryngology, Head and Neck Surgery, Uppsala University, Uppsala. Electronic address: malin.l.svensson@akademiska.se.
2
Department of Respiratory Medicine, University Hospital, Umeå, Sweden.
3
Department of Medical Sciences, Respiratory Medicine and Allergology, Uppsala University, Uppsala.

Abstract

OBJECTIVES:

The aim was to investigate the significance of snoring and sleep apnea on daytime symptoms in a population-based sample of women.

METHOD:

From the general population, 400 women aged 20 to 70 years were randomly selected, with oversampling of habitually snoring women. The women were investigated using full-night polysomnography and a questionnaire. The apnea-hypopnea index (AHI) was calculated, and women who acknowledged snoring loudly and disturbingly often or very often were considered habitual snorers.

RESULTS:

Habitual snoring was independently related to excessive daytime sleepiness (odds ratio [OR], 2.28; 95% confidence interval [CI], 1.31 to 3.99), to falling asleep involuntarily during the day (OR, 2.11; 95% CI, 1.06 to 4.21), to waking up unrefreshed (OR, 2.14; 95% CI, 1.30 to 3.52), to daytime fatigue (OR, 2.77; 95% CI, 1.54 to 4.99), and to a dry mouth on awakening (OR, 2.00; 95% CI, 1.22 to 3.27) after adjustment for AHI, age, body mass index (BMI), smoking, total sleep time, percentage of slow-wave sleep, and percentage of rapid eye movement (REM) sleep. An AHI > or = 15/h was only related to a dry mouth on awakening after adjustment for snoring, age, BMI, smoking, total sleep time, percentage of slow-wave sleep, and percentage of REM sleep (OR, 2.24; 95% CI, 1.14 to 4.40). An AHI of 5 to 15/h was not related to any daytime symptom.

CONCLUSIONS:

Excessive daytime sleepiness and daytime fatigue are related to habitual snoring independent of the apnea-hypopnea frequency, age, obesity, smoking, and sleep parameters in a population-based sample of women, but not to the AHI. This indicates that snoring is an independent cause of excess daytime sleepiness and not merely a proxy for sleep apnea.

PMID:
18753465
DOI:
10.1378/chest.08-0847
[Indexed for MEDLINE]
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