To compare the sleep-disordered breathing prevalence among Hispanic and white Americans and Japanese, the researchers performed a one-night sleep study with a single channel airflow monitor on 211 Hispanics and 246 whites from the Minnesota Field Center of the Multi-Ethnic Study of Atherosclerosis (MESA), and 978 Japanese from three community-based cohorts of the Circulatory Risk in Communities Study (CIRCS) in Japan.

The respiratory disturbance index and sleep-disordered breathing, defined as respiratory disturbance index?15 disturbances·hr-1, were estimated. The sleep-disordered breathing prevalence was higher in males (34.2%) than females (14.8%), and higher among Hispanics (36.5%) and whites (33.3%) than among Japanese (18.4%), corresponding to differences in body mass index.

Within body mass index strata, the race difference in sleep-disordered breathing was attenuated. This was also true when we adjusted for body mass index instead of stratification. The strong association between body mass index and sleep-disordered breathing was similar in Japanese and Americans.

The sleep-disordered breathing prevalence was lower among Japanese than the Americans. However, the association of body mass index with sleep-disordered breathing was strong, and similar among the race/ethnic groups studied. The majority of the race/ethnic difference in sleep-disordered breathing prevalence was explained by a difference in body mass index distribution. (200 words/200 limits).

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Filed under: Sleep • Sleep Apnea • Sleep Apnea News • Sleep Apnea Research • Sleep Apnea Study • Sleep Disordered Breathing • Sleep Study

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