INDEPTH Study on Global Ageing and Adult Health 2006-2007
Wave 1
South Africa, 2006 - 2007
Get MicrodataIdentification
ZAF_2006_INDEPTH-SAGE-W1_v01_M
INDEPTH Study on Global Ageing and Adult Health 2006-2007
Wave 1
| Name | Country code |
|---|---|
| South Africa | ZAF |
World Health Survey [hh/whs]
The WHO-INDEPTH Study on Global Ageing and Adult Health is the first round of the SAGE surveys in the INDEPTH health and demographic surveillance sites. SAGE was designed by WHO and implemented by the health and demographic surveillance sites in participating countries.
Purpose:
The multi-country Study on Global Ageing and Adult Health (SAGE) is run by the World Health Organization's Multi-Country Studies unit in the Innovation, Information, Evidence and Research Cluster. SAGE is part of the unit's Longitudinal Study Programme which is compiling longitudinal data on the health and well-being of adult populations, and the ageing process, through primary data collection and secondary data analysis. INDEPTH SAGE Wave 1 (2006/7) provides data on the health and well-being of adults in: Ghana, India and South Africa.
Objectives:
To obtain reliable, valid and comparable health, health-related and well-being data over a range of key domains for adult and older adult populations in nationally representative samples
To examine patterns and dynamics of age-related changes in health and well-being using longitudinal follow-up of a cohort as they age, and to investigate socio-economic consequences of these health changes
To supplement and cross-validate self-reported measures of health and the anchoring vignette approach to improving comparability of self-reported measures, through measured performance tests for selected health domains
To collect health examination and biomarker data that improves reliability of morbidity and risk factor data and to objectively monitor the effect of interventions
Additional Objectives:
To generate large cohorts of older adult populations and comparison cohorts of younger populations for following-up intermediate outcomes, monitoring trends, examining transitions and life events, and addressing relationships between determinants and health, well-being and health-related outcomes
To develop a mechanism to link survey data to demographic surveillance site data
To build linkages with other national and multi-country ageing studies
To improve the methodologies to enhance the reliability and validity of health outcomes and determinants data
To provide a public-access information base to engage all stakeholders, including national policy makers and health systems planners, in planning and decision-making processes about the health and well-being of older adults
Methods:
INDEPTH SAGE's first full round of data collection included persons aged 50 years and older in the health and demographic surveillance sites. All persons aged 50+ years (for example, spouses and siblings) were invited to participate. Standardized SAGE survey instruments were used in all countries consisting of two main parts: 1) household questionnaire; 2) individual questionnaire. The procedures for including country-specific adaptations to the standardized questionnaire and translations into local languages from English follow those developed by and used for the World Health Survey.
Content
-
Household questionnaire
0000 Coversheet
0100 Sampling Information
0200 Geocoding and GPS Information
0300 Recontact Information
0350 Contact Record
0400 Household Roster
0450 Kish Tables and Household Consent
0500 Housing
0600 Household and Family Support Networks and Transfers
0700 Assets and Household Income
0800 Household Expenditures
0900 Interviewer Observations -
Individual questionnaire
1000 Socio-Demographic Characteristics
1500 Work History and Benefits
2000 Health State Descriptions and Vignettes
2500 Anthropometrics, Performance Tests and Biomarkers
3000 Risk Factors and Preventive Health Behaviours
4000 Chronic Conditions and Health Services Coverage
5000 Health Care Utilization
6000 Social Cohesion
7000 Subjective Well-Being and Quality of Life (WHOQoL-8 and Day Reconstruction Method)
8000 Impact of Caregiving
9000 Interviewer Assessment
Sample survey data [ssd]
household and individuals
Version
Version 01: Edited, anonymous dataset for public distribution.
2011-11-11
Scope
The scope of the INDEPTH Study on Global Ageing and Adult Health includes:
- Household: household characteristics, housing, household and family support, assets and household income, household expenditure.
- Individual: socio demographic characteristics, work history, health state, anthropometrics, performance tests and biomarkers, risk factors, chronic conditions and health service coverage, health care utilisation, social cohesion, subjective well-being and quality of life, caregiving.
| Topic | Vocabulary |
|---|---|
| International Network for the Demographic Evaluation of Populations and their Health in developing countries (INDEPTH) | Survey |
Coverage
Rural subdistrict Mpumalanga Province
Agincourt Health and Demographic Surveillance Site fifty plus population
Producers and sponsors
| Name | Affiliation |
|---|---|
| Professor Stephen Tollman | MRC/Wits Rural Public Health and Health Transitions Research Unit. School of Public Health. University of the Witwatersrand. |
| Name | Affiliation | Role |
|---|---|---|
| F. Xavier Gomez-Olive | MRC/Wits Rural Public Health and Health Transitions Research Unit. School of Public Health. University of the Witwatersrand. | technical assistance on data collection |
| Katheleen Kahn | MRC/Wits Rural Public Health and Health Transitions Research Unit. School of Public Health. University of the Witwatersrand. | technical assistance on data collection |
| Benjamin Clark | MRC/Wits Rural Public Health and Health Transitions Research Unit. School of Public Health. University of the Witwatersrand. | technical assistance on data collection |
| Name | Role |
|---|---|
| US National Institute on Aging | Financial support through Interagency Agreements (OGHA 04034785; YA1323-08-CN-0020; Y1-AG-1005-01) and Grants (R01-AG034479; IR21-AG034263-0182) |
| Name | Affiliation | Role |
|---|---|---|
| Dr Richard Suzman | The National Institute on Aging's Division of Behavioral and Social Research | Dr Suzman was Instrumental in providing continuous intellectual and other technical support to SAGE and has made the entire endeavour possible |
Sampling
Simple random sample of 575 persons 50 years and older with an oversample of women from the 2005 HDSS census.
86% of participants accepted to participate, 10% were not found and 4% refused to participate.
Survey instrument
The questionnaires were based on the WHS Model Questionnaire with some modification and many new additions. A household questionnaire was administered to all households eligible for the study. An Individual questionnaire was administered to eligible respondents identified from the household roster. The questionnaires were developed in English and were piloted as part of the SAGE pretest. All documents were translated into Shangaan.
Data collection
| Start | End | Cycle |
|---|---|---|
| 2006-05 | 2006-07 | wave1 |
| 2006-12 | 2007-02 | wave2 |
- Face-to-face [f2f]
| Name | Affiliation |
|---|---|
| MRC/Wits Rural Public Health and Health Transitions Research Unit | School of Public Health, University of Witwatersrand |
Interviewing was conducted by teams of interviewers. Each interviewing team comprised of 3 field workers, a supervisor and a driver. Each team had its own car to transport field workers to the first assigned household for that working day.
The role of the supervisor was to coordinate field data collection activities, including management of the field teams, supplies and equipment, maps and listings. Additionally, the field supervisor assigned the work to the interviewers, spot checked work, maintained field control documents, and sent completed questionnaires and progress reports to the central office.
The field editor was responsible for reviewing each questionnaire at the end of the day, checking for missed questions, skip errors, fields incorrectly completed, and checking for inconsistencies in the data. The field editor also kept track of household visited and assuring that all households had a completed questionnaire back to the main office. In case forms had to be sent back to the field he was responsible of registering the form and assuring the form came back to the office.
Field visits were also made by Dr. Gomez-Olive who visited the field every week to provide support, check quality and review progress.
A pilot of three sections of the questionnaire (2000, 3000 and 5000) was done in April 2005, visiting 8 people using the future supervisors as field workers.
The study team was composed by two supervisors, six field workers, one data editor, one driver and two data clerks. Data entry was supervised by Benjamin Clark and field activities by F. Xavier Gomez-Olive.
Training was done during two weeks from mid May 2006. Field work started at the end of May 2006 divided in two periods. The first one from end of May to end of July 2006 and the second from December 2006 to February 2007. All anthropometric measurements were done in December 2006 for those interviewed in the first period due to late arrival of equipment.
Questionnaries were translated to Shangaan and back translated to English. The translation created some issues at the beginning of the field work because the translated instrument was considered to be too academic for field workers. Once they became more familiar with the translations, interviews went smoothly. At the beginning interviews lasted around 3 hours with no anthropometric measurements but after two weeks interviews were reduced to 90 minutes. In the second period, including anthropometric measurements, interviews lasted around 90-120 minutes.
Data processing
Data editing took place at a number of stages including:
(1) office editing and coding
(2) during data entry
(3) structural checking of the CSPro files
(4) range and consistency secondary edits in Stata
Data Access
| Name | Affiliation | |
|---|---|---|
| Nirmala Naidoo | World Health Organization | sagesurvey@who.int |
The user undertakes:
(1) to keep confidential any information concerning individual persons or households
(2) not to distribute the data to any other user
(3) to use the data for scientific research only
(4) to share any planned publications with WHO prior to publication
Publications based on INDEPTH SAGE data should use the following acknowledgement: "This paper uses data from the WHO INDEPTH Study on Global AGEing and Adult Health (SAGE)."
Disclaimer and copyrights
The data is being distributed without warranty of any kind. The responsibility for the use of the data lies with the user. In no event shall the World Health Organization be liable for damages arising from its use.
© World Health Organization 2011
Contacts
| Name | Affiliation | URL | |
|---|---|---|---|
| Nirmala Naidoo | World Health Organization | sagesurvey@who.int | http://apps.who.int/healthinfo/systems/surveydata |
Metadata production
DDI_ZAF_2006_INDEPTH-SAGE-W1_v01_M
| Name | Affiliation | Role |
|---|---|---|
| Nirmala Naidoo | World Health Organization | Metadata supervision and review and documentation of study |
| Yunpeng Huang | World Health Organization | Documentation of data |
| F. Xavier Gomez-Olive | MRC/University of Witwatersrand | Contributed to metadata |
| Development Economics Data Group | The World Bank | Metadata adapted for World Bank Microdata Library |
2023-05-17
Metadata version
Version 01 (May 2023): This metadata was downloaded from the WHO Multi-Country Studies Data Archive (https://apps.who.int/healthinfo/systems/surveydata/index.php/catalog) and it is identical to WHO version (ZAF-WHO-INDEPTH-SAGE-20067-v01). The following two metadata fields were edited - Document ID and Survey ID.