Assessment of cardiovascular risk using WHO CVD risk prediction chart with respect to hypertension status among Indian population: A secondary analysis of National Family Health Survey (2015-16).

Background: Hypertension, is a crucial risk factor for the development of cardiovascular disease (CVD). Studies assessing the risk of developing CVD among high-risk groups like hypertensives is limited. Aim: The purpose of this study was to find the distribution of CVD risk with respect to hypertension status among Indian adults. Material and Methods: This was a secondary data analysis of NFHS-4 survey data. The distribution of CVD risk among hypertensive participants using 2019 WHO CVD risk prediction charts was compared with normotensive participants among women aged 40-49 years and men in the age group of 40-54 years. Results: The proportion of hypertension was higher among women who consumed alcohol (31.5%) than those who did not (24.3%). The proportion of hypertensives increased with increasing BMI, with maximum proportion among obese women (37.3%). Among women, majority (95.7%) had low CVD risk (<5%) while 4.2% had 5% to <10% CVD risk, and only 0.1% had >10% risk. Among men, those with low CVD risk (<5%) was 65%, those with 5% to <10% CVD risk was 32.3%, 10% to <20% was 2.7%, and a meagre 0.03% had 20 to <30% risk. Conclusion: In the current study, prevalence of hypertension was seen to be increasing with age and was higher in urban residents than rural among both men and women. Both high blood pressure reading during the survey and self-reported hypertension was found to be higher among richest wealth index category. Although risk was higher among hypertensives, self-reported hypertensives who had their blood pressure controlled, had risk similar to normotensives indicating the importance of management of hypertension.