The China Health and Retirement Longitudinal Study
The China Health and Retirement Longitudinal Study (CHARLS) aims to collect a high quality nationally representative sample of Chinese residents ages 45 and older to serve the needs of scientific research on the elderly.
Overview
- Acronym
- CHARLS
- Investigators
-
- Contacts
-
General Design
- Study design
- Cohort
- Start - End Year
- 2011 -
- General Information on Follow Up (profile, frequency)
-
CHARLS respondents are followed every 2 years, using a face-to-face computer-assisted personal interview (CAPI). Physical measurements are conducted at every follow-up and blood-sample collection is done once in every two follow-up cycles.
- Recruitment Target
-
- Individuals
- Other : Spouses
- Number of Participants
- 17,708
- Number of Participants with Biological Samples
- 12,122
Access
Availability of data and biosamples
| Possible Access to Data | |
| Possible Access to Biosamples | |
| Other |
|
Marker Papers
Zhao Y, Hu Y, Smith JP, Strauss J, Yang G. Cohort Profile: The China Health and Retirement Longitudinal Study (CHARLS). International Journal of Epidemiology. 2014;43(1):61-68.
PUBMED 23243115Timeline
Population
CHARLS - Population
Nationally representative sample of Chinese residents ages 45 and older and their spouses.
Selection Criteria
- Minimum age
-
45
- Countries
-
- China
- Territory
- All counties with the exception of Tibet
Sources of Recruitment
- General Population
-
- Selected sample
- Supplementary Information
-
Samples were chosen through multistage probability sampling. The sample was stratified by region and within region by urban districts or rural counties and per capita statistics on gross domestic product (GDP). Because no pre-existing sampling frame of residents existed, mapping and listing operations within each village-level unit was conducted to obtain the sampling frame for CHARLS. If more than one household was found within each dwelling unit, a household with a member 45 years of age or older was randomly selected. If the chosen household had more than one age-eligible member, one of them was randomly selected and both that person and his or her spouse were interviewed.
Sample Size
- Number of Participants
- 17,708
- Number of Participants with Biological Samples
- 12,122
- Supplementary information about number of participants
-
10 069 were main respondents randomly selected after the randomization procedures for the survey, and 7639 were spouses of main respondents.
Data Collection Events
| # | Name | Data sources | Data sources - Biosamples | Start | End |
|---|---|---|---|---|---|
| 0 | CHARLS - Baseline |
|
|
2011 (June) | 2012 (March) |
| 1 | CHARLS - Follow-up 1 |
|
2013 (June) | 2014 (March) |
Participating Studies
| Acronym | Name | Study design | Countries |
|---|
Harmonization Initiatives Included
| Acronym | Name |
|---|
Datasets
| Name | Data Collection Events | Variables |
|---|
Areas of Information Collected
- Socio-demographic and economic characteristics
- Death
- Lifestyle and behaviours
- Physical measures and assessments
- Birth, pregnancy and reproductive health history
- Laboratory measures
- Perception of health, quality of life, development and functional limitations
- Cognition, personality and psychological measures and assessments
- Diseases
- Life events, life plans, beliefs and values
- Symptoms and signs
- Preschool, school and work life
- Medication and supplements
- Social environment and relationships
- Non-pharmacological interventions
- Physical environment
- Health and community care services utilization
- Administrative information
Variables Content Summary
Areas of Information Collected
No Areas of Information Collected
No Scales Collected
Areas of Information Collected per per Population and Data Collection Event
No Areas of Information Collected
No Scales Collected
Networks
| Acronym | Name | Harmonization Initiatives | Individual Studies |
|---|
Last Update: 2023-05-03T11:03:55.690