Estimation of yearly incidence of hypertension based on the trends in age-standardised prevalence of hypertension, in Vietnam population aged 25–74 between 2001 and 2009, stratified by sex.

1Age-standardised prevalence of hypertension from studied sample;
2Number of people aged 25–74 from general population of Vietnam;
3Estimation from (1) and (2);
4New cases of hypertension estimated from two consecutive prevalence of hypertension;
5Yearly incidence of hypertension estimated from average number of new cases and average population at risk every year.