Chinese Longitudinal Healthy Longevity Survey (CLHLS), 1998-2005 (ICPSR 24901)

Published: Jun 4, 2009

Principal Investigator(s):
Zeng Yi, Duke University, and Peking University; James W. Vaupel, Max Planck Institutes, and Duke University; Xiao Zhenyu, Beijing University. China National Research Center on Aging; Liu Yuzhi, Peking University. Center for Healthy Aging and Family Studies; Zhang Chunyuan, Peking University. Center for Healthy Aging and Family Studies


Version V2

The Chinese Longitudinal Healthy Longevity Survey (CLHLS) provides information on health status and quality of life of the elderly aged 65 and older in 22 provinces of China in the period 1998 to 2005. The study was conducted to shed light on the determinants of healthy human longevity and oldest-old mortality. To this end, data were collected on a larger percentage of the oldest population, including centenarian and nonagenarian, than had previously been studied. The CLHLS provides information on the health, socioeconomic characteristics, family, lifestyle, and demographic profile of this aged population. Data are provided on respondents' health conditions, daily functioning, self-perceptions of health status and quality of life, life satisfaction, mental attitude, and feelings about aging. Respondents were asked about their diet and nutrition, use of medical services, and drinking and smoking habits, including how long ago they quit either or both. They were also asked about their physical activities, reading habits, television viewing, and religious activities, and were tested for motor skills, memory, and visual functioning. In order to ascertain their current state of health, respondents were asked if they suffered from such health conditions as hypertension, diabetes, heart disease, stroke, cancer, emphysema, asthma, tuberculosis, cataracts, glaucoma, gastric or duodenal ulcer, arthritis, Parkinson's disease, bedsores, or other chronic diseases. They were also asked if they needed assistance with bathing, dressing, toileting, or feeding, and who provided help in times of illness. Other questions focused on siblings, parents, and children, the frequency of family visits, and the distance lived from each other. Demographic items specify age, sex, ethnicity, place of birth, marital history and status, history of childbirth, living arrangements, education, main occupation before age 60, and sources of financial support.

Yi, Zeng, Vaupel, James W., Zhenyu, Xiao, Yuzhi, Liu, and Chunyuan, Zhang. Chinese Longitudinal Healthy Longevity Survey (CLHLS), 1998-2005. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2009-06-04.

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National Natural Science Foundation of China ((70533010))

United Nations Population Fund

Hong Kong Research Grants Council

United States Department of Health and Human Services. National Institutes of Health. National Institute on Aging ((R01 AG023627-01))


This data collection may not be used for any purpose other than statistical reporting and analysis. Use of these data to learn the identity of any person or establishment is prohibited. In preparing the data files for this collection for public archiving and distribution, the producers have removed direct identifiers and characteristics that might lead to identification of data subjects. Users interested in obtaining a CD-ROM containing the 1998, 2000, and 2002 Chinese Longitudinal Healthy Longevity Survey micro datasets need to download the Chinese Longitudinal Healthy Longevity Survey restricted data use agreement form from the ICPSR Web site.

1998 -- 2005

1998-03-01 -- 2005-10-31

All centenarians from the randomly selected counties and cities of 22 provinces in China who agreed to participate in the study. For each centenarian, one octogenarian aged 80-89 living nearby, one nearby nonagenarian aged 90-99, and one nearby younger elder aged 65-79 of predesignated age and sex were interviewed.

The most elderly population in the counties and cities of 22 provinces in China during the period 1998-2005.


survey data

computer-assisted self interview (CASI)

face-to-face interview

self-enumerated questionnaire

The response rate was 88 percent.

Mini-Mental State Examination (MMSE)

Activities of Daily Living (ADL)



2009-05-21 ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:

  • Performed consistency checks.
  • Standardized missing values.

2009-06-04 Documentation has been added.


  • The public-use data files in this collection are available for access by the general public. Access does not require affiliation with an ICPSR member institution.

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This study is maintained and distributed by the National Archive of Computerized Data on Aging (NACDA), the aging program within ICPSR. NACDA is sponsored by the National Institute on Aging (NIA) at the National Institutes of Heath (NIH).