Dong Da Health Demographic Surveillance System (HDSS) is a part of a collaborative research and training project between Hanoi Medical University – Vietnam, the Nordic School of Public Health – Sweden and the Oxford University, UK. DODALAB HDSS also get supports and involvements from the Hanoi Health Bureau. The main aim is to develop a field to generate basic data for planning and policy making as well as public health research and training in urban area in Vietnam.
DODALAB is located in Dong Da district of Hanoi city, the capital of Vietnam. This is the largest urban district in Hanoi that covers an area of 10 km2 and consists of 352,000 inhabitants. Its socioeconomic characteristics are quite representative for urban context in Hanoi. Three of 21 communes were selected for the HDSS because of the different in socioeconomic groups. The surveillance started with the baseline survey conducted late in 2007 including 10,806 households with 37,308 persons.
The surveillance is applied basing on the household-registration system through household interview. The first follow up survey was carried out during April to June, 2008 and then repeated every three months. During these visits, vital events including births, deaths and migration were collected and updated. Information related to pregnancies, reported illness, health care seeking practices and health expenditure were also recorded. Especially, all newborns in DODALAB since April 2009 have been followed by measuring their height, weight and upper arm size. Census surveys are conducted every two years and the first one has been conducted at the end of the year 2009 with 40,595 persons under surveillance.