%0 Journal Article
%T Dimensions of sleepiness and their correlations with sleep-disordered breathing in mild sleep apnea
%A Martinez
%A Denis
%A Lumertz
%A Magali Santos
%A Lenz
%A Maria do Carmo Sfreddo
%J Jornal Brasileiro de Pneumologia
%D 2009
%I Sociedade Brasileira de Pneumologia e Tisiologia
%R 10.1590/S1806-37132009000600003
%X objective: there are many ways of assessing sleepiness, which has many dimensions. in patients presenting a borderline apnea-hypopnea index (ahi, expressed as events/hour of sleep), the mechanisms of excessive daytime sleepiness (eds) remain only partially understood. in the initial stages of sleep-disordered breathing, the ahi might be related to as-yet-unexplored eds dimensions. methods: we reviewed the polysomnography results of 331 patients (52% males). the mean age was 40 ¡À 13 years, and the mean ahi was 4 ¡À 2 (range, 0-9). we assessed ten potential dimensions of sleepiness based on polysomnography results and medical histories. results: the ahi in non-rapid eye movement (nrem) stage 1 sleep (ahi-n1), in nrem stage 2 sleep (ahi-n2), and in rem sleep (ahi-rem) were, respectively, 6 ¡À 7, 3 ¡À 3 and 10 ¡À 4. the ahi-n2 correlated significantly with the greatest number of eds dimensions (5/10), including the epworth sleepiness scale score (r = 0.216, p < 0.001). factor analysis, using cronbach's alpha, reduced the variables to three relevant factors: questionnaire (¦Á = 0.7); polysomnography (¦Á = 0.68); and complaints (¦Á = 0.55). we used these factors as dependent variables in a stepwise multiple regression analysis, adjusting for age, gender, and body mass index. the ahi-n1 correlated significantly with polysomnography (¦Â = -0.173, p = 0.003), and the ahi-n2 correlated significantly with complaints (¦Â = -0.152, p = 0.017). the ahi-rem did not correlate with any factor. conclusions: our results underscore the multidimensionality of eds in mild sleep apnea.
%K disorders of excessive somnolence
%K sleep apnea syndromes
%K sleep
%K rem
%K polysomnography.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1806-37132009000600003&lng=en&nrm=iso&tlng=en