Global Youth Tobacco Survey 1999
South Africa, 1999
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ZAF_1999_GYTS_v01_M
Global Youth Tobacco Survey 1999
GYTS 1999
| Name | Country code |
|---|---|
| South Africa | ZAF |
Other Household Survey [hh/oth]
This is the first GYTS conducted by South Africa.
The GYTS is a school-based survey which uses a self-administered questionnaire to monitor tobacco use among youth and to guide the implementation and evaluation of tobacco prevention and control programmes.
Sample survey data [ssd]
Individuals
Version
Public-use dataset
2018-08-15
Scope
GYTS is composed of 56 "core" questions designed to gather data on the following seven domains:
- Knowledge and attitudes of young people towards cigarette smoking
- Prevalence of cigarette smoking and other tobacco use among young people
- Role of the media and advertising in young people’s use of cigarettes
- Access to cigarettes
- Tobacco-related school curriculum
- Environmental tobacco smoke (ETS)
- Cessation of cigarette smoking
Countries may add addtional optional questions, such as on shisha use, smokeless tobacco use or e-cigarettes, or country-specific questions.
| Topic | Vocabulary |
|---|---|
| Global Youth Tobacco Survey (GYTS) | Survey |
Coverage
National coverage
School-going adolescents aged 13-15 years.
Producers and sponsors
| Name |
|---|
| Medical Research Council |
| National Department of Health |
| Name | Abbreviation |
|---|---|
| World Health Organization | WHO |
| US Centers for Disease Control and Prevention | CDC |
Sampling
GYTS uses a global standardized methodology that includes a two-stage sample design with schools selected with a probability proportional to enrollment size. The classes within selected schools are chosen randomly and all students in selected classes are eligible to participate in the survey.
Eligible students in grades 8, 9 and 10 completed the survey, of which 2579 were aged 13-15 years.
The school response rate was 76.9%, the student response rate was 85.5%, and the overall response rate was 65.7%.
The weighting formula used is:
W=W1 W2 f1 f2 f3*f4
The list below shows what each variable in the formula represents.
W1 - The inverse of the probability of selecting the school
W2 - The inverse of the probability of selecting the class within the school
f1 - a school-level nonresponse adjustment factor calculated by school size category (small, medium, large)
f2 - a class adjustment factor calculated by school
f3 - a student-level nonresponse adjustment factor calculated by class
f4 - a post stratification adjustment factor calculated by gender and grade
Data collection
| Start | End |
|---|---|
| 1999 | 1999 |
- self-administered
Data processing
All data processing (scanning, cleaning, editing, and weighting) was conducted at the US Centers for Disease Control.
Data Access
The user undertakes:
(1) to acknowledge the data source.
(2) to share any planned publications with WHO prior to publication.
(3) to offer co-authorship of any reports or publications using the survey results to the coordinator of the survey.
(4) to use the data for non-commercial, not-for-profit public health purposes only.
Publications based on GYTS data should use the following acknowledgement:
"This paper uses data from the Global Youth Tobacco Survey (GYTS). GYTS is supported by the World Health Organization and the US Centers for Disease Control and Prevention."
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.
Contacts
| Name | Affiliation | URL | |
|---|---|---|---|
| NCD Surveillance Team | World Health Organization | ncdmonitoring@who.int | http://www.who.int/ncds/surveillance/en/ |
Metadata production
DDI_ZAF_1999_GYTS_v01_M
| Name | Abbreviation | Affiliation | Role |
|---|---|---|---|
| Yue Wu | World Health Organization | Documentation of data | |
| Melanie Cowan | World Health Organization | Supervision and review of metadata and documentation of study | |
| Development Economics Data Group | DECDG | The World Bank | Metadata adapted for World Bank Microdata Library |
2018-08-15
Metadata version
Identical to a metadata (ZAF_1999_GYTS_v01) published on WHO NCD microdata repository (http://extranet.who.int/ncdsmicrodata/index.php/catalog). Some of the metadata fields have been edited.