Description:
The data set for dissemination contains 23 variables and 5615 cases of respondents aged 15 and older who participated in the SANHANES-1 Adult clinical examination, with a specific focus on information relating to blood pressure, cholesterol and blood sugar levels.
Abstract:
The South African National Health and Nutrition Examination Survey (SANHANES) was established as a continuous population health survey to address the changing health needs in the country and provide a broader and more comprehensive platform to study the health status of the nation on a regular basis.
The SANHANES-1 project was conducted during 2011-12, involved a sample of 10,000 households (VPs). Among these, 8,166 households were deemed valid and occupied. Within these valid VPs/households that agreed to participate in the survey, 27 580 individuals were eligible to be interviewed. A total of 25 532 individuals (92.6%) completed the interview whilst 7.4% refused to participate. Those individuals who agreed to be interviewed were further invited to participate in the physical and clinical examination. Of those who were eligible,12 025 (43.6%) agreed to undergo physical examinations, and 8 078 (29.3%) consented to blood testing.
This survey provides critical information to map the emerging epidemic of NCDs in South Africa among other defined priorities of the National Department of Health and analyses their social, economic, behavioural and environmental determinants. Data on the magnitude of and trends in NCDs, as well as other existing/emerging health priorities, is essential to develop national prevention and control programmes, assessing the impact of interventions, and evaluating the health status of the country.
The primary objectives of the SANHANES-1 were to assess defined aspects of the health and nutritional status of South Africans with respect to the prevalence of NCDs (specifically cardiovascular disease, diabetes and hypertension) and their risk factors (diet, physical activity and tobacco use):
The knowledge, attitudes and behaviour of South Africans with respect to NCDs and tuberculosis;
The nutritional status of South Africans as it relates to food security, dietary intake/ behaviour including alcohol consumption, body image and weight management;
The perceptions of general and mental health (stress and trauma) and healthcare services;
The health status of children under the age of five years;
The health status of children aged 2â9 years with respect to physical and/or mental disabilities;
The behavioural (smoking, diet, physical inactivity) and social determinants of health and nutrition (demographic, socio-economic status and locality) and relate these to the health and nutritional status of the population.
Clinical measurements
Face-to-face interview
All persons who participated in the adult clincal examination survey.
The survey applied a multi-stage disproportionate, stratified cluster sampling approach. A total of 1 000 census enumeration areas (EAs) from the 2001 population census were selected from a database of 86 000 EAs and mapped in 2007 using aerial photography to create the 2007 HSRC master sample to use as a basis for sampling of households. The selection of EAs was stratified by province and locality type. In the formal urban areas, race was also used as a third stratification variable (based on the predominant race group in the selected EA at the time of the 2001 census). The allocation of EAs to different stratification categories was disproportionate, in other words, over-sampling or over-allocation of EAs occurred in areas that were dominated by Indian, Coloured or White race groups to ensure that the minimum required sample size in those smaller race groups were obtained. Based on the HSRC 2007 Master Sample, 500 EAs representative of the socio-demographic profile of South Africa were identified and a random sample of 20 visiting points (VPs) were randomly selected from each EA, yielding an overall sample of 10 000. EAs were sampled with probability proportional to the size of the EA using the 2001 census estimate of the number of VPs in the EA database as a Measure of Size (MOS).
