[Sleep characteristics of a population of patients seeking bariatric surgery].

Introduction: Investigation for obstructive sleep apnea syndrome (OSAS) is mandatory before bariatric surgery. Data regarding chronic insomnia and chronic sleep deprivation are scarce in this population.

Methods: A cross-sectional study assessing the prevalence of chronic insomnia, OSAS and chronic sleep privation in an obese population referred for bariatric surgery.

Results: In all, 88 patients (74% women, median age 41 [33.5-50] years and median body mass index 42 [39.2-45.7] kg/m) were included. The prevalence of chronic insomnia was 31% in the 87% suffering from OSAS that required continuous positive airway pressure therapy. Comorbid insomnia and sleep apnoea (COMISA) were found in 27% of our population. Chronic insomnia was associated with a lower quality of life (median EQ5D analogue visual scale: 60 [50-70] P=0.04) and a poor sleep quality (median Pittsburgh sleep quality index (PSQI): 8 (6-11 P<0.01) The deleterious combination of sleep privation and insomnia had a higher impact in terms of impairment of quality of life and sleep quality (median EQ5D analogue visual scale: 50 [40-65] P=0.02 et median PSQI: 11 [9-14, P<0.01) CONCLUSION: Chronic insomnia and sleep privation have synergistic deleterious effects in candidates for bariatric surgery. Further studies need to be conducted to evaluate the evolution after surgery.