PURPOSE: To determine any correlation between the degree of “Body Mass Index”, (BMI) and the incidence of hypertension in patients with increasing severity of Obstructive Sleep Apnea, (OSA).
METHODS: A retrospective analysis was performed at the Southwest Cleveland Sleep Center, a community-based sleep disorders diagnostic and treatment program. Data was available for 519 patients who had “obstructive sleep apnea” (OSA) diagnosed within the past five years by overnight polysomnography. The severity of OSA was quantified by the “Respiratory Disturbance Index”, (RDI) which was reported “in events per hour”. OSA was categorized as “mild” for an RDI of 5 to 15, “moderate” if 15 to 30, and “severe” if greater than 30. Information regarding the BMI and the diagnosis of hypertension were obtained from the patients records maintained in the sleep laboratory.
RESULTS: We grouped patients in each category of OSA into two subgroups on the basis of their BMI. In one subgroup, we included patients with a BMI of greater than 35 and in the other, patients with a BMI of less than 35. In the group of mild OSA patients, the subgroup with a BMI of greater than 35 had a 91.66% incidence of hypertension, and the subgroup with a BMI of less than 35 had an 88% incidence of hypertension. Similarly in the group of moderate OSA patients, the subgroup with a BMI of greater than 35 had an 80.95% incidence of hypertension and an incidence of 84.61% in the subgroup with a BMI of less than 35. Lastly, in the group of severe OSA patients, the subgroup with a BMI of greater than 35 had an 83.33% incidence of hypertension and an incidence of 86.44% in the subgroup with a BMI of less than 35.
CONCLUSION: As per the results, there seems to be no correlation between the degree of BMI and the incidence of hypertension in the OSA patients.
CLINICAL IMPLICATIONS: BMI cannot be used as a predictor of determining the incidence of hypertension in OSA patients.
DISCLOSURE: Imran Iftikhar, None.