AHRI.Surveillance Episodes Basic Dataset 2023
South Africa, 2000 - 2023
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AHRI.SEB2023.V1
AHRI.Surveillance Episodes Basic Dataset 2023
| Name | Country code |
|---|---|
| South Africa | ZA |
Africa Health Research Institute (AHRI) is a multidisciplinary, independent research institute. AHRI's goal is to become a source of fundamental discoveries into the susceptibility, transmission and cure of HIV, TB and related diseases. We also seek ways to improve diagnosis, prevention and treatment. To achieve this, we bring together leading researchers from different fields, use cutting edge science to improve people's health, and help to train the next generation of African scientists.
AHRI has conducted individual and household demographic surveillance since 2000. Demographic surveillance data are processed for longitudinal analyses by organizing the demographic surveillance data into individual and household residency episodes at a geographical physical location, and individual membership episodes within a household. Start events of residency and memberships include enumeration, birth, in-migration and relocating into a household from within the study population. Exit events of residency and memberships include death (by cause), out-migration and relocating to another location in the study population. AHRI annually produces a suite of Individual Demographic surveillance datasets which contains detailed records of all individuals under surveillance since January 2000. The datasets detail individual residency and membership patterns, household mortality (including cause of death), fertility, migration, HIV status, health care utilization, and household socio-economic profile.
Each record in the dataset represents a period of observation for an individual during which all the recorded characteristics of the individual stay constant. For example, on the birthday of the individual a new episode will start, because the age of the individual has changed. An out-migration will result in a new episode, because the location or residential status has changed. Any change in one of the status values, such as education, marital status, social-economic status and HIV will likewise result in a new episode on the date of the change.
There are four versions of the Demographic surveillance datasets:
- SurveillanceEpisodesBasic
- SurveillanceEpisodesBasicYrAge
- SurveillanceEpisodesBasicHIV
- SurveillanceEpisodesYrAgeDelivery
The definitions of the SurveillanceEpisodes vary slightly between the four versions. All SurveillanceEpisodesBasic are specific to a) individual b) residency type except that a new episode starts if the age changes (SurveillanceEpisodes BasicYrAge), HIV status changes (SurveillanceEpisodesBasicHIV). The SurveillanceEpisodesBasic datasets contain specific variables in addition to the minimum variables that each dataset has. For instance, SurveillanceEpisodesBasicHIV contains all HIV related variables in addition to the basic minimum variables that all surveillance episodes contain. Causes and likelihood of deaths from InterVA 5 are also included. Table 1 below describes the seven Demographic surveillance datasets
Event History Data
Episodes of exposure
Version
v1.0.0
Scope
| Topic | Vocabulary | URI |
|---|---|---|
| Surveillance Episodes Basic | Africa Health Research Institute | www.ahri.org |
Coverage
AHRI is situated in the south-east portion of the uMkhanyakude district of KwaZulu-Natal province near the town of Mtubatuba. It is bounded on the west by the Umfolozi-Hluhluwe nature reserve, on the south by the Umfolozi river, on the east by the N2 highway (except form portions where the KwaMsane township strandles the highway) and in the north by the provincial road R22. The surveillance area is approximately 845km2 in size.
Households resident in dwellings within the study area are eligible for inclusion in the household component of AHRI Demographic Surveillance. All individuals identified by the household proxy informant as members of the households are enumerated. A resident household member is an individual that intends to sleep majority of time at the dwelling occupied by the household over a four-month period. Households include resident and non-resident members. An individual is a non-resident member if they have close ties to the household, but do not physically reside with the household at the dwelling most of the time. Non-resident members can also be called temporary migrants and they are enumerated within the household list. Because household membership is not tied to physical residency, an individual may be a member of more than one household.
Producers and sponsors
| Name | Affiliation |
|---|---|
| Kobus Herbst | AHRI, SAPRIN |
| Guy Harling | AHRI |
| Mark Siedner | AHRI |
| Willem Hanekom | AHRI |
| Name |
|---|
| Africa Health Research Institute |
| Name | Role |
|---|---|
| Wellcome Trust | Core funding |
| SAPRIN |
| Name | Affiliation | Role |
|---|---|---|
| AHRI Research Data Management Team | AHRI | Research Data Management |
| AHRI Data Collection Team | AHRI | Data Collection |
| AHRI Community Engagement Team | AHRI | Community Engagement |
Sampling
This dataset is not based on a sample but contains information from the complete demographic surveillance areas.
Data collection
| Start | End |
|---|---|
| 2000-01-01 | 2023-07-31 |
Data processing
Data collected in this study was centrally stored on AHRI's secure database servers. Data was collected through interviews at the call centre on central server using Survey Solutions, and in the field on paper and encrypted tablet computers using REDCap, and then securely uploaded to a central server. Database rules and constraints were enforced on the master database to ensure that only valid data was stored. Personally identifiable data was restricted to separate database tables accessible only to data management staff .
Data Access
Access to the data requires accurate completion of the online data access application form accessible on the AHRI Data repository(<https>). Data users are required to abide by the data use conditions stipulated on the application for access to the data. Failure to do so may result in their data access privileges being revoked by the Data Custodian. In order to recognise the effort and intellectual contributions of AHRI investigators in producing and curating the data, users of AHRI data must acknowledge the source of the data and abide by the terms and conditions under which the data is accessed and must cite the dataset in publication using the citation provided as part of this documentation. All analytical datasets published on the AHRI Data Repository are assigned digital object identifier (DOIs) and the DOIs can be found on the Data Repository under Study Description tab - Access policy. AHRI data users are required to always cite the dataset using the relevant DOI.
Herbst, K., Harling, G., Siedner, M., & Hanekom, W. (2023). AHRI.Surveillance Episodes Basic Dataset 2023 (Version 1) [Data set]. Africa Health Research Institute. DOI:https://doi.org/10.23664/AHRI.SEB2023
Metadata production
DDI.AHRI.SEB2023.v1
| Name |
|---|
| Africa Health Research Institute |