A Study on the Prevalence of Obstructive Sleep Apnea in Patients With Type II Diabetes Mellitus

Inclusion Criteria: * Patients, age 18 - 75, with type 2 diabetes mellitus, including those on diet, on oral-hypoglycaemic agents or on insulin * Patients who are able to give written consent to undergo polysomnography Exclusion Criteria: * Patients who are unable or unwilling to give written consent to participate in the study * Patients with unstable medical illness or poor functional performance * Patients with recent myocardial infarction or hospital admission for congestive heart failure or cardiac arrhythmia in the past three months * Patients on renal replacement therapy for diabetic nephropathy or chronic renal failure, or plan to start renal replacement therapy in the coming six months * Patients suffered from recent stroke in the past six months or previous history of stroke with significant focal neurological deficit * Patients with type I diabetes * Pregnant lady or lactating women