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The Health and Aging in Africa: A Longitudinal Study of an INDEPTH Community in South Africa (HAALSI) study is a population-based survey that aims to examine and characterize a population of older men and women in rural South Africa with respect to health, physical and cognitive function, aging, and well-being, in harmonization with other Health and Retirement Studies.

The baseline survey was conducted among 5,059 men and women aged 40 years or older, who were sampled from within the existing framework of the Agincourt health and socio-demographic surveillance system (AHDSS), in rural Mpumalanga province, South Africa. Survey data were collected on cognitive and physical functioning, social networks, cardiometabolic disease and risk factors, HIV and HIV risk, and economic well-being. The survey also included anthropometric measures and point-of-care blood tests for hemoglobin, glucose and lipids. Dried bloodspots (DBS) were collected at the survey and later tested for HIV, HIV viral load, glucose and CRP. A sub-sample had more extensive laboratory follow-up testing, which will be available in future data releases. A second wave of the survey was administered in 2018 through 2019, and a third wave of the survey was administered in 2021 through 2022.

Demographic information includes age, sex, income, education, marital status, number of children, and employment.

Harvard dataverse hosts an additional restricted-use dataset which compliments this collection, the HAALSI Baseline HIV Biomarker Data; users interested in obtaining these data must request access based on the terms outlined in the data use agreement.

The Tsogolo La Thanzi (TLT): Baseline Wave collection contains data collected as part of the Tsogolo la Thanzi (TLT) Study. TLT is a longitudinal study in Balaka, Malawi designed to examine how young people navigate reproduction in an AIDS epidemic. Tsogolo la Thanzi means "Healthy Futures" in Chichewa, Malawi's most widely spoken language. New data is being collected to develop better understandings of the reproductive goals and behavior of young adults in Malawi -- the first cohort to never have experienced life without AIDS. To understand these patterns of family formation in a rapidly changing setting, TLT used the following approach: an intensive longitudinal design where respondents are interviewed every fourth months at TLT's centralized research center. Data collection began in May of 2009 and was completed in June of 2012. To assess changes on a longer time-horizon, a follow-up survey we refer to as Tsogolo la Thanzi 2 (TLT-2) was fielded between July and October of 2015.

The Women dataset (dataset 1) contains variables that pertain to pregnancy, family composition, partners and relationships, mental health, marriage, sex and protection, sexually transmitted diseases, goods purchases, and diet.

The Male Partners dataset (dataset 2) contains variables that pertain to relationships, religion, politics, family composition, mental health, sex and protection, pregnancy, marriage, sexually transmitted diseases, goods purchases, and diet.

The Random Men dataset (dataset 3) asked respondents about their mental health, partners and relationships, sexually transmitted diseases, sex and protection, family composition, goods purchases, and diet.

The Male Partners at Alternative Waves dataset (dataset 4) includes baseline data collected for male partners who began participating in the study between Wave 2 and Wave 8. If male partners entered the study at Wave 2 or later, their first interview was the baseline questionnaire (Wave 1), and at the next round of data collection they received the current wave's questionnaire. This dataset includes variables that pertain to relationships, religion, mental and physical health, family composition, sex and protection, fatherhood, marriage, sexually transmitted diseases, good purchases and diet.

Demographic variables in each dataset include age, tribe, language, and education.

The Tsogolo La Thanzi (TLT): Biomarker collection contains data collected as part of the Tsogolo la Thanzi (TLT) Study. TLT is a longitudinal study in Balaka, Malawi designed to examine how young people navigate reproduction in an AIDS epidemic. Tsogolo la Thanzi means "Healthy Futures" in Chichewa, Malawi's most widely spoken language. New data is being collected to develop better understandings of the reproductive goals and behavior of young adults in Malawi -- the first cohort to never have experienced life without AIDS. To understand these patterns of family formation in a rapidly changing setting, TLT used the following approach: an intensive longitudinal design where respondents are interviewed every fourth months at TLT's centralized research center. Data collection began in May of 2009 and was completed in June of 2012. To assess changes on a longer time-horizon, a follow-up survey referred to as Tsologo la Thanzi 2 (TLT-2) was fielded between June and August of 2016.

The biomarker data collection contains the results of HIV testing and pregnancy testing. These data sets include respondents from all waves.

Tsogolo la Thanzi (TLT) is a longitudinal study in Balaka, Malawi designed to examine how young people navigate reproduction in an AIDS epidemic. Tsogolo la Thanzi means "Healthy Futures" in Chichewa, Malawi's most widely spoken language. New data is being collected to develop better understandings of the reproductive goals and behavior of young adults in Malawi -- the first cohort to never have experienced life without AIDS. To understand these patterns of family formation in a rapidly changing setting, TLT used the following approach: an intensive longitudinal design where respondents are interviewed every four months at TLT's centralized research center. Data collection began in May of 2009 and was completed in June of 2012. To assess changes on a longer time-horizon, a follow-up survey referred to as Tsogolo la Thanzi 2 (TLT-2) was fielded between June and August of 2016.

This study contains data collected from the eighth wave of the multi-wave study.

Each of waves 1-8 is comprised of three data files. The Women dataset (dataset 1) is a random sample of women aged 15-25 in 2009 (N=1,505 at wave 1) drawn from a census of the area. Likewise, the Random Men dataset (dataset 3) is a random sample of men aged 15-25 in 2009 (N=574 at wave 1) drawn from a census of the area. The Male Partners dataset (dataset 2) contains survey data from sexual and romantic partners who were referred into the study by respondents in the women's file; this is a non-random sample of male partners, so analysts should be especially cautious with inferences.

Topics covered across all waves include relationships, religion, HIV/AIDS, politics, family composition, mental health, sex and protection, pregnancy, marriage, sexually transmitted diseases, future expectations, school enrollment status, goods purchased/received, and diet.

Modules specific to wave 8 include: health services, travel, treatment optimism, and parent information.

Additional demographic variables in each dataset include age and education.

Tsogolo la Thanzi (TLT) is a longitudinal study in Balaka, Malawi designed to examine how young people navigate reproduction in an AIDS epidemic. Tsogolo la Thanzi means "Healthy Futures" in Chichewa, Malawi's most widely spoken language. New data is being collected to develop better understandings of the reproductive goals and behavior of young adults in Malawi -- the first cohort to never have experienced life without AIDS. To understand these patterns of family formation in a rapidly changing setting, TLT used the following approach: an intensive longitudinal design where respondents are interviewed every four months at TLT's centralized research center. Data collection began in May of 2009 and was completed in June of 2012. To assess changes on a longer time-horizon, a follow-up survey referred to as Tsogolo la Thanzi 2 (TLT-2) was fielded between June and August of 2016.

This study contains data collected from the fifth wave of the multi-wave study.

Each wave is comprised of three data files. The Women dataset (dataset 1) is a random sample of women aged 15-25 in 2009 (N=1,505 at wave 1) drawn from a census of the area. Likewise, the Random Men dataset (dataset 3) is a random sample of men aged 15-25 in 2009 (N=574 at wave 1) drawn from a census of the area. The Male Partners dataset (dataset 2) contains survey data from sexual and romantic partners who were referred into the study by respondents in the women's file; this is a non-random sample of male partners, so analysts should be especially cautious with inferences.

Topics covered across all waves include relationships, religion, HIV/AIDS, politics, family composition, mental health, sex and protection, pregnancy, marriage, sexually transmitted diseases, future expectations, school enrollment status, goods purchased/received, and diet.

Modules specific to wave 5 include: best friend characteristics, health services, relationship power, relationship scripts, treatment optimism and travel.

Additional demographic variables in each dataset include age and education.

Tsogolo la Thanzi (TLT) is a longitudinal study in Balaka, Malawi designed to examine how young people navigate reproduction in an AIDS epidemic. Tsogolo la Thanzi means "Healthy Futures" in Chichewa, Malawi's most widely spoken language. New data is being collected to develop better understandings of the reproductive goals and behavior of young adults in Malawi -- the first cohort to never have experienced life without AIDS. To understand these patterns of family formation in a rapidly changing setting, TLT used the following approach: an intensive longitudinal design where respondents are interviewed every four months at TLT's centralized research center. Data collection began in May of 2009 and was completed in June of 2012. To assess changes on a longer time-horizon, a follow-up survey referred to as Tsogolo la Thanzi 2 (TLT-2) was fielded between June and August of 2016.

This study contains data collected from the fourth wave of the multi-wave study.

Each wave is comprised of three data files. The Women dataset (dataset 1) is a random sample of women aged 15-25 in 2009 (N=1,505 at wave 1), drawn from a census of the area. Likewise, the Random Men dataset (dataset 3) is a random-sample of men aged 15-25 in 2009 (N=574 at wave 1) drawn from a census of the area. The Male Partners dataset (dataset 2) contains survey data from sexual and romantic partners who were referred into the study by respondents in the women's file; this is a non-random sample of male partners, so analysts should be especially cautious with inferences.

Topics covered across all waves include relationships, religion, HIV/AIDS, politics, family composition, mental health, sex and protection, pregnancy, marriage, sexually transmitted diseases, future expectations, school enrollment status, goods purchased/received, and diet.

Additional demographic variables in each dataset include age and education.

The Tsogolo La Thanzi (TLT): Migration Autopsy collection contains data collected as part of the Tsogolo la Thanzi (TLT) Study. TLT is a longitudinal study in Balaka, Malawi designed to examine how young people navigate reproduction in an AIDS epidemic. Tsogolo la Thanzi means "Healthy Futures" in Chichewa, Malawi's most widely spoken language. New data is being collected to develop better understandings of the reproductive goals and behavior of young adults in Malawi -- the first cohort to never have experienced life without AIDS. To understand these patterns of family formation in a rapidly changing setting, TLT used the following approach: an intensive longitudinal design where respondents are interviewed every fourth months at TLT's centralized research center.

The Migration Autopsy collection contains many TLT respondents whom moved away during the study period. In order to both carefully track attrition and gather valuable information about migration, TLT performed a migration autopsy on study participants who migrated from the study area during the course of the 8-wave observation period. Data collection began in April of 2009 and was completed in December of 2012. To assess changes on a longer time-horizon, a follow-up survey we refer to as Tsogolo la Thanzi 2 (TLT-2) was fielded between June and August of 2016.

Tsogolo la Thanzi (TLT) is a longitudinal study in Balaka, Malawi designed by Jenny Trinitapoli and Sara Yeatman to examine how young people navigate reproduction in an AIDS epidemic. Tsogolo la Thanzi means "Healthy Futures" in Chichewa, Malawi's most widely spoken language. The TLT research team has collected data to better understand the reproductive goals and behavior of young adults in Malawi. This is the first cohort to never have experienced life without AIDS. To understand these patterns of family formation in a rapidly changing setting, TLT used the following approach: an intensive longitudinal design where respondents are interviewed every fourth month at TLT's centralized research center. Data collection began in May of 2009 and was completed in December 2011 (waves 1-8).

In addition, a Refresher Sample (wave 9) was fielded in early 2012 as a form of addressing study attrition but also to create the ability to compare the "treatment" effect of survey participation on respondents who participated in waves 1-8.

The Refresher Sample includes 315 women who were sampled but not enrolled at wave 1 (baseline), and thus only entered the study in 2012. Furthermore, to assess changes on a longer time-horizon, a follow-up survey referred to as TLT-2 was fielded between June and August of 2016 which includes all baseline and comparison sample women, plus all men ever-interviewed for the study.

Each of waves 1-8 are comprised of three data files: women, random men, and male partners. However, wave 9 includes only a sample of women who did not enroll in baseline (N=315).

Topics covered across all waves include relationships, religion, HIV/AIDS, politics, family composition, mental health, sex and protection, pregnancy, marriage, sexually transmitted diseases, future expectations, school enrollment status, goods purchased/received, and diet. Of the occasional modules, those included at wave 9 [Refresher Sample] are: background, residency and migration, travel and parent information. Otherwise, the comparison sample is more similar to the baseline wave, relative to other rounds of data collection.

Tsogolo la Thanzi (TLT) is a longitudinal study in Balaka, Malawi designed to examine how young people navigate reproduction in an AIDS epidemic. Tsogolo la Thanzi means "Healthy Futures" in Chichewa, Malawi's most widely spoken language. This data was collected to develop better understandings of the reproductive goals and behavior of young adults in Malawi -- the first cohort to never have experienced life without AIDS. To understand these patterns of family formation in a rapidly changing setting, TLT used the following approach: an intensive longitudinal design where respondents are interviewed every four months at TLT's centralized research center. Data collection began in May of 2009 and was completed in June of 2012. To assess changes on a longer time horizon, a follow-up survey we refer to as Tsogolo la Thanzi 2 (TLT-2) was fielded between June and August of 2016.

This study contains data collected from the second wave of the multi-wave study.

Each wave is comprised of three data files. The Women dataset (dataset 1) is a random sample of women aged 15-25 in 2009 (N=1,505 at wave 1), drawn from a census of the area. Likewise, the Random Men dataset (dataset 3) is a random-sample of men aged 15-25 in 2009 (N=574 at wave 1) drawn from a census of the area. The Male Partners dataset (dataset 2) contains survey data from sexual and romantic partners who were referred into the study by respondents in the women's file; this is a non-random sample of male partners, so analysts should be especially cautious with inferences.

Topics covered across all waves include relationships, religion, HIV/AIDS, politics, family composition, mental health, sex and protection, pregnancy, marriage, sexually transmitted diseases, future expectations, school enrollment status, goods purchased/received, and diet.

Modules specific to wave 2 include: two-year future expectations. Additionally, the child roster, household roster, and travel for interview sections begin at wave 2.

Additional demographic variables in each dataset include age and education.

Tsogolo la Thanzi (TLT) is a longitudinal study in Balaka, Malawi designed to examine how young people navigate reproduction in an AIDS epidemic. Tsogolo la Thanzi means "Healthy Futures" in Chichewa, Malawi's most widely spoken language. New data is being collected to develop better understandings of the reproductive goals and behavior of young adults in Malawi -- the first cohort to never have experienced life without AIDS. To understand these patterns of family formation in a rapidly changing setting, TLT used the following approach: an intensive longitudinal design where respondents are interviewed every four months at TLT's centralized research center. Data collection began in May of 2009 and was completed in June of 2012. To assess changes on a longer time-horizon, a follow-up survey referred to as Tsogolo la Thanzi 2 (TLT-2) was fielded between June and August of 2016.

This study contains data collected from the sixth wave of the multi-wave study.

Each wave is comprised of three data files. The Women dataset (dataset 1) is a random sample of women aged 15-25 in 2009 (N=1,505 at wave 1) drawn from a census of the area. Likewise, the Random Men dataset (dataset 3) is a random sample of men aged 15-25 in 2009 (N=574 at wave 1) drawn from a census of the area. The Male Partners dataset (dataset 2) contains survey data from sexual and romantic partners who were referred into the study by respondents in the women's file; this is a non-random sample of male partners, so analysts should be especially cautious with inferences.

Topics covered across all waves include relationships, religion, HIV/AIDS, politics, family composition, mental health, sex and protection, pregnancy, marriage, sexually transmitted diseases, future expectations, school enrollment status, goods purchased/received, and diet.

Modules specific to wave 6 include: best friend characteristics, treatment optimism, travel, and health services.

Additional demographic variables in each dataset include age and education.

Tsogolo la Thanzi (TLT) is a longitudinal study in Balaka, Malawi designed to examine how young people navigate reproduction in an AIDS epidemic. Tsogolo la Thanzi means "Healthy Futures" in Chichewa, Malawi's most widely spoken language. New data is being collected to develop better understandings of the reproductive goals and behavior of young adults in Malawi -- the first cohort to never have experienced life without AIDS. To understand these patterns of family formation in a rapidly changing setting, TLT used the following approach: an intensive longitudinal design where respondents are interviewed every four months at TLT's centralized research center. Data collection began in May of 2009 and was completed in June of 2012. To assess changes on a longer time-horizon, a follow-up survey referred to as Tsogolo la Thanzi 2 (TLT-2) was fielded between June and August of 2016.

This study contains data collected from the third wave of the multi-wave study.

Each wave is comprised of three data files. The Women dataset (dataset 1) is a random sample of women aged 15-25 in 2009 (N=1,505 at wave 1), drawn from a census of the area. Likewise, the Random Men dataset (dataset 3) is a random-sample of men aged 15-25 in 2009 (N=574 at wave 1) drawn from a census of the area. The Male Partners dataset (dataset 2) contains survey data from sexual and romantic partners who were referred into the study by respondents in the women's file; this is a non-random sample of male partners, so analysts should be especially cautious with inferences.

Topics covered across all waves include relationships, religion, HIV/AIDS, politics, family composition, mental health, sex and protection, pregnancy, marriage, sexually transmitted diseases, future expectations, school enrollment status, goods purchased/received, and diet.

Modules specific to wave 3 include: relationship power.

Additional demographic variables in each dataset include age and education.