Hypertension is one of the most widely prevalent diseases throughout the world, which is emerging as one of the leading causes of premature morbidity and mortality globally. Nocturnal blood pressure readings measured by ABPM also provide prognostic data. 24 hr Ambulatory BP and specifically nocturnal blood pressure has been found to be associated with superior predictive and prognostic value for target organ dysfunction and CVD events either symptomatic or asymptomatic. Purpose of our study is to find out the prevalence of dipper, non-dipper, reverse dipper and extreme dipper in patients with stable CAD and their association with severity of CAD.