Individual Study / CHARLS

The China Health and Retirement Longitudinal Study

The China Health and Retirement Longitudinal Study

CHARLS logo
Initiatives -
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.
Start Year
2011
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Members

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Investigators Contacts
  • Prof Yaohui Zhao
    National School of Development, Peking University

Design

Study design
Population cohort
Follow Up
12122

Marker Paper

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 23243115

Recruitment

Sources of Recruitment
  • Individuals
  • Other : Spouses

Number of participants

Number of participants
17,708
Number of participants with biosamples
12,122

Access

Availability of data and biosamples

Data
Biosamples
Other

Availability of access information

On the study website : http://charls.pku.edu.cn/index/en.html

Supplementary Information

Timeline

Population

Nationally representative sample of Chinese residents ages 45 and older and their spouses.
Selection Criteria
Minimum age
45
Newborns
Twins
Countries
  • China
Territory
All counties with the exception of Tibet
Ethnic Origin
Health Status

Recruitment

Sources of recruitment
  • General population
  • Participants from existing studies
General Population
  • Selected sample
Participants from existing studies

Number of participants

Number of participants
17,708
Number of participants with biosamples
12,122
Supplementary Information
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 Description Start End
0 CHARLS - Baseline

The interviews were performed at the respondents’ home using a face-to-face computer-assisted personal interview (CAPI).

The core questionnaires included sections directed at: ...

2011-06 2012-03
1 CHARLS - Follow-up 1

The interviews were performed at the respondents’ home using a face-to-face computer-assisted personal interview (CAPI).

The core questionnaires included sections directed at: ...

2013-06 2014-03