Materials and methods: 30 children (24 boys and 6 girls) with 3– 5 years old, diagnosed of specific language impairment (develop- ment quotient P 70 in Brunet-Lezine Scale), normal MRI, without epileptiform discharges in EEG, no hearing impairment, no other dis- orders and with parents in medium–high sociocultural level. Chil- dren participated in a polysomnographic (PSG) sleep recording. Sleep disorders like Obstructive Sleep Apnea Pediatric (OSAP), Peri- odic Limb Movement Disorder (PLMD) and parasomnias, and sleep characteristics like sleep stages percentage, spindles characteristics, presence of significant alpha rhythm during sleep (alpha-delta sleep), microarousal index, sleep efficiency and awakenings episodes were analyzed. Results: In our sample, we found OSAP only in one patient, and parasomnias in 2 patients. However, data about PLMD was relevant, 93.3% present this disorder with an average index of 9:316  6:11. We found an average of 4:073%  3:41 of stage 1, 40:76  8:89 of stage 2, 25:381  6:91 of stage 3, 25:587  6:91 of stage REM, 112:76  25:65 of body movements, 3:10  1:6 awakening episodes P5 min, 85:14  9:07 of sleep efficiency, 37:556  9:6 of microa- rousal index (83.4% with microarousal index P 30), 80% present sig- nificant percentage of alpha rhythm during sleep and 66.7% presented unsuitable spindles. Conclusion: We observed that although the sleep architecture in terms of the macrostructure, like time spent in the different stage of sleep, appears to not be consistently altered in relation with nor- mal values, it is very important the analysis of sleep microstructure because specific features would be altered in these patients and could be related to the problem of language skills. Treatment for spe- cific sleep disorders and treatment to stabilize sleep structure, could improve the symptomatology in these patients. http://dx.doi.org/10.1016/j.sleep.2013.11.114 Association between clinical signs and symptoms related to sleep-disordered breathing in mouth breathers school children N. Finck 1 , M. Araújo 2 , M. Pacheco 1 1 UFES, Programa de Pós-graduação em Clínica Odontológica 2 UFES, Departamento de Ciências Fisiológicas Introduction: Sleep-disordered breathing (SDB) is one of the causes of morbidity in children. The symptoms of SDB in children are varied and difficult to diagnose, especially in mouth breathing children (MB). The aim of this study was to associate the clinical signs of the MB and the self-perception of their symptoms related to SDB, focusing on nasal, sleep and masticatory problems. Materials and methods: From a previous study, a sample of 73 pre- selected MB derived from elementary schools, aged 7–14 years old, was reevaluated about the presence of anatomical and functional facial and dental occlusion changes, the temporomandibular joint (TMJ) and posture alterations and breathing pattern abnormalities. Concomitantly, a questionnaire about symptoms of SDB was applied to the MB. This instrument contains 16 questions about TMJ, nasal and sleep problems. From 42 clinical variables reevaluated, 19 were selected by the Binomial test where the cutoff point was the average of the variables’ prevalence. Afterwards, we used the logistic regres- sion through Backward method and the Wald test to verify the asso- ciation between these clinical variables and the 16 questions from the questionnaire. Results: For TMJ symptoms the clinical variables were significant to: lack of lip closure, Class II malocclusion, deviation from interoc- clusal position, overbite, forward head position and palatine tonsil hypertrophy. For the nasal symptoms the clinical variables were sig- nificant to: turbinate hypertrophy and deviation from interocclusal position. Lastly, for the sleep symptoms the clinical variables were significant to: turbinate hypertrophy, palatine tonsils hypertrophy, deviation from interocclusal position, lack of lip seal, obstructive Mallampati index (III and IV), and protrusion deviation. Most signif- icant finds were those related to the sleep symptoms: mouth breath- ing and obstructive Mallampati index were related to complaints of snoring, waking up during the night and sleeping were related with the mouth open; mouth breathing and palatine tonsils hypertrophy were related to complaints of sleep problems and daytime sleepiness. Conclusion: This study showed that craniofacial, upper airway and postural abnormalities are associated with an increased risk of SDB in mouth breathers children. Acknowledgements: Management of Vitoria City, ES, Brazil. http://dx.doi.org/10.1016/j.sleep.2013.11.115 Sociocultural variations of sleep difficulties’ coping strategies in couple relationships in Canada and in Brazil T. Araújo, A. Vallières, Y. Leanza Laval University, School of Psychology Introduction: Sleep is a natural phenomenon that is deeply imbed- ded in cultural contexts where it takes place. However, contempo- rary sleep theories reflect mainly the north western industrialized society. This study explores the experience of sleep difficulties in everyday life of Canadian and Brazilian couples focusing on possible sociocultural variations. Materials and methods: Five heterosexual couples without children aged between 24–47 years were recruited in Quebec-Canada and Fortaleza-Brazil. At least one partner reported having sleep prob- lems. Participants attended two meetings one week apart: 1) com- pletion of self- reported questionnaires (PSQI & DAS- 16); 2) couple in-depth semi-structured interview. During the seven days between both meetings, partners wrote free reports about their pre- vious night of sleep. Quantitative and qualitative data analyses were performed. The phenomenological method was used to analyze interview data. The cross- cultural comparison helped to highlight the relevant aspects of each context. Results: Regardless of city, the experiences of sleep difficulties are mostly associated with professional- and adult lives-related stress that reflect symptoms of insomnia. Respondents self-reported satis- faction in their couple relationship and adoption of personal strate- gies to cope with sleep difficulties that seem to be influenced by their choice of marital status and the values rooted in their societies. In Quebec, where common-law union predominates, partners’ strat- egies are more cooperative, focused on both partners. They seek a balance between their autonomy, freedom and well-being in bed- sharing/couple relationship. In Fortaleza, where marriage predomi- nates, partners’ strategies are more focused on oneself or in favor of another in a greater specialization of tasks and complementary roles. Conclusion: Negative consequences of sleep difficulties in couples daily life seem to be overcome by the desire of being together in a healthy relationship. The strategies employed seem to shade the clinical aspect of sleep difficulties and to function as a ’’regulator’’ of what could affect the proper functioning of their union. The expe- rience of healthy relationships seems then to promote appropriate behaviors related to sleep, but do not, necessarily, assure the lack of sleep difficulties within the couple. Recognition of the dyadic nat- ure of sleep could contribute to the identification of the diagnosis and the management of sleep disorders and deserves further atten- tion in other studies. e62 Abstracts / Sleep Medicine 14S (2013) e18–e92