Prevalence of Obstructive Sleep Apnea in Hypertension Clinic Attendees of a Tertiary Care Centre
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Obstructive Sleep Apnea (OSA) and essential hypertension (HT) are common conditions affecting middle-aged and elderly adults. This study was done to know the percentage of hypertensive patients having Obstructive Sleep Apnea (OSA) and to correlate severity of OSA with the severity of hypertension. Fifty hypertensive patients attending hypertension clinic of People's Hospital enrolled as per inclusion criteria were subjected to detailed history, general examination, blood pressure measurements and overnight Polysomnography (PSG). Apart from this, clinical data gathered was applied to Sleep Questionnaires- Berlin Questionnaire, STOP-Bang Questionnaire, and NoSAS score. Mild and severe obstructive sleep apnea was found in 12% of patients each, whereas moderate obstructive sleep apnea was seen in only 6% of patients. 11 patients with stage I hypertension and 24 patients with stage II hypertension did not have OSA. Patients with stage I hypertension had mild OSA. Patients with stage II hypertension had all severity of OSA but there were more patients with severe OSA (6) then mild OSA (3) or moderate OSA (3). Only a minority of patients (30%) with essential hypertension had OSA. Majority of the patients with stage I and stage II hypertension did not have OSA. Severity of OSA increased with the increase in stage of hypertension but the observed correlation was statistically insignificant (p>0.05).
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