Hypertension in urban slums of southern India: Burden, awareness, health seeking, control and risk factor profile.

Introduction: Hypertension is the leading risk factor for global disease burden. Inequalities in health among urban poor and non-poor is a matter of concern. The current study was done to estimate the prevalence of hypertension and to describe the health seeking and risk factor profile of people with hypertension in the urban slums of Kochi, Kerala, India.

Methods: Blood pressure of 5980 adults from 20 randomly selected slums were measured by door to door survey by trained nurses as a part of baseline assessment for a cluster randomised controlled trial.

Results: Prevalence of hypertension was found to be 34.8% (95% CI 33.5-34.9). Among those with hypertension, 66.9% were aware of their hypertensive status, of which 75.8% were initiated on treatment for hypertension. Proportion of hypertensive in the population who had their blood pressure under control was 24.5%. Among hypertensive, 53% were obese, 25.1% had diabetes mellitus, 14% had history of hospitalisation for high blood pressure. Of them, 60.3% had a per capita salt consumption above 8 g/day and 47.5% of them reported sitting for more than 8 h on a usual day. Mean monthly out of pocket expenditure for treatment of hypertension was $9(Median $8, IQR $16).

Conclusion: One in three adults in urban slums of Kochi had hypertension. High rates of obesity, salt intake, physical inactivity prevails among the people with hypertension. Awareness, treatment initiation and control rate of hypertension are lower in urban slums as compared to non-slum urban areas. Slums require additional attention to ensure equitable and universal access to hypertension control.