Predictors of obesity hypoventilation syndrome among patients with sleep-disordered breathing in India

INTRODUCTION: and forced vital capacity (FVC) <3.5 L for men and <2.3 L for women from western countries, cannot be applied to Indian patients. OBJECTIVES: To find out the prevalence of OHS and to determine the predictors of OHS among Indian SDB patients. MATERIALS AND METHODS: It was a retrospective observational study conducted in a tertiary care institute from September 1, 2017, to August 31, 2018. All the patients who underwent polysomnography were analyzed for the presence of OHS. Of 85 patients referred for polysomnography, 76 had SDB. Thirteen patients were excluded because of hypoventilation due to other known causes or could not perform spirometry. CONCLUSION: The prevalence of OHS in Indian patients is similar to Caucasians. OHS is seen in Indian patients even at a lower BMI and lower spirometric parameters.