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* From the Department of Pneumology, Hospital Universitario Virgen del Rocío, Sevilla, Spain.
Correspondence to: Angeles Sánchez-Armengol, MD, Department of Pneumology, Hospital Universitario Virgen del Rocío, Manuel Siurot s/n, E-41013 Sevilla, Spain; e-mail: almar{at}comcadiz.es
Study objectives: To determine the frequency, symptoms, and polygraphic features of sleep-related breathing disorders (SRBD) in adolescents aged 12 to 16 years.
Design: Cross-sectional study.
Setting: Randomly selected secondary schools in the city of Seville, Spain.
Participants: A general population sample of adolescents (n = 101; mean [± SD] age, 13.2 ± 0.8 years).
Interventions: An 82-item questionnaire regarding anthropometric data and nocturnal and daytime symptoms suggestive of SRBD was administered. Symptoms were evaluated according to a 4-point frequency scale. Snorers answered "sometimes" or "often" in the question about snoring, and nonsnorers answered "never" or "rarely." All subjects underwent an overnight cardiorespiratory polygraphy at home.
Results: Twenty-nine percent of
the subjects were snorers. Excessive daytime sleepiness was present in
14% of subjects, and sleep apnea was present in 3%. Polygraphy showed
a respiratory disturbance index 
10 in 18 subjects (17.8%), but
concurrent symptoms highly suggestive of SRBD were found in only 2
subjects (1.9%). Snorers had higher waist-to-hip ratios and a higher
frequency of witnessed apnea or labored breathing as well as higher
values of respiratory events as compared with nonsnorers. However,
oximetry data were similar in both groups.
Conclusions: In a nonselected group of adolescents aged 12 to 16 years, the frequency of symptoms potentially associated with SRBD was similar to that reported for younger children. Snoring was associated with a higher occurrence of other nocturnal symptoms, a more central pattern of body fat distribution, and a higher respiratory disturbance index as compared with nonsnorers. Although polygraphic abnormalities were mild, two cases of probable SRBD were found with a prevalence rate of 1.9%.
Key Words: adolescence • cardiorespiratory polygraphy • sleep-related breathing disorders
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