Resumo

OSUNA SUAREZ, Édgar; DIAZ C, Andrés; PORRAS C, Alexandra  e  RAMIREZ D, John. Restless legs syndrome, frequency and its association with obstructive sleep apnea syndrome. rev.fac.med. [online]. 2009, vol.57, n.3, pp.218-226. ISSN 0120-0011.

Background. Prevalence of restless legs syndrome (RLS) has been reported between 2,5 to 29 percent. To our knowlage there are no studies that show a correlation between restless legs syndrome and obstructive sleep apnea syndrome. Objectives. To determine the frequency of RLS in a group of adult patients who had a polysomnography at the Fundacion Santa Fe of Bogota University Hospital not referred for RLS evaluation, between January 1 to December 31, 2006 and to determine its relationship to OSAS. Materials abd methods. An analytic prevalence study was conducted. Patients filled out a questionnaire in which RLS diagnostic criteria were included and its frequency of presentation. Patients were grouped by gender, age, body mass index and severity of obstructive sleep apnea. Sleep latency was also considered. Results. 302 subjects were included, 72 percent were male, 43 fulfilled RLS clinical criteria. A global prevalence was 14,3 percent, for women it was 18,3 percent and for men 12,8 percent. A higher prevalence was found in patients between 50-59 years old, both in the whole group and in the male group (18,4 % and 16,4% respectively). In the female group prevalence was higher in patients older than 70 years (28,6%). Prevalence was higher in the obese group in both genders (p = 0,003). Sleep latency was significantly increased in the RLS group (p = 0,003). Females with mild to moderate OSAS showed higher RLS frequency whereas there was no correlation between the severity of OSA and RLS frequency in the male group. Conclusions. Prevalence of RLS in our sample was similar to that reported by other latinamerican groups. Women, subjects older than 50 years old, obesity and women with mild to moderate OSAS showed an increase in the frequency of presentation of RLS. Sleep latency was significantly increased in the RLS group.

Palavras-chave : restless legs syndrome; sleep apnea; obstructive; polysomnography; nocturnal myoclonus syndrome; cross-sectional studies.

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