The research goal is to determine which factors, out of a large set of social, behavioral, biological, and environmental risk factors play an important role in healthy longevity. The research will provide the basis for scientific research and hygiene policy making.

  • General Information of Study
    • Overview
      Name Chinese Longitudinal Healthy Longevity Survey (CLHLS)
      Project Number CCC2017122801
      Zeng Yi
      Lei Xiaoyan
      Shi Xiaoming
      Institutions Center for Healthy Aging and Development Studies, National School of Development, Peking University. Since 2009, the CLHLS surveys have been jointly conduvcted by Peking University and Chinese Center for Disease Control and Prevention.
      Wang Qian
      Funding National Natural Science Foundation of China (71490732), NIA/NIH of USA (3P01AG031719-07S1)
      Objectives The research goal is to determine which factors, out of a large set of social, behavioral, biological, and environmental risk factors play an important role in healthy longevity. The research will provide the basis for scientific research and hygiene policy making.
      Start Date 1998.04
      End Date None
    • Study Design
      Number of Participants Inyerviewed 113k participants, including 20.1k centenarians (aged 100+), 26.8k nonagenarians (aged 90-99), 29.3k octogenarians (aged 80-89), 20.1k young elders aged 65-79, and 11.2k middle-aged peers aged 35-64.
      Age Range Elderly aged 65+, and middle-aged peers aged 35-65
      Geographic Distribution The CLHLS project covers 23 provinces: Beijing, Tianjin, Hebei, Shanxi, Liaoning, Jilin, Heilongjiang, Shanghai, Jiangsu, Zhejiang, Anhui, Fujian, Jiangxi, Shandong, Henan, Hubei, Hunan, Guangdong, Guangxi, Hainan, Chongqing, Sichuan, Shaanxi.
      General Information of Study Design and Sample Methods The CLHLS attempted to interview all centenarians in the randomly selected half of the counties and cities of the surveyed provinces. For each centenarian, one near-by octogenarian (aged 80-89), one near-by nonagenarian (aged 90-99) and 1.5 yong-old aged 65-79, with pre-designated age and sex, were interviewed.
      Inclusion Criteria None
      Exclusion Criteria None
    • Other Information
      Key Achievements The research findings of the CLHLS team have been published in top journals, such as The Lancet, Scientific Reports (Nature series journal), Economic Research, etc.. For example, the Lancet group considers our paper on ""The trends of health status of Chinese oldest-old population and strategies to face the challenges"" as a key scientific discovery and presented an online press release to the global researchers in March 2017. The Lancet declared that ""This is the largest study on oldest-old population in the world and the findings have great significance to China and other countries facing the chllenges of population aging (
      Our policy reports which used CLHLS data have been written noticed by Chinee President Xi JinPing, Prime Minister Li Keqiang, former Prime Minister Wen Jiabao and other leaders of the central government, and were listed twice as main reports by Internal Reference of High-level Reports sponsored by National Development and Reform Commission and submitted to the central and local authorities of China.
      Until March 2018, there are 4,317 scholars (not including their students or other team members) who registered and used the CLHLS datasets free of charge. Their publications based on CLHLS database include: 11 books, 246 articles published in anonymous peer-reviewed SCI/SSCI journals in North America or Europe, 357 articles published in peer-reviewed journals in China, 34 Ph.D. degree thesis, 73 M.A. degree thesis, and 346 policy research/advisory reports.
      Marker Papers BOOKS written in English:
      Zeng, Yi, Dudley Poston, Denese Ashbaugh Vlosky and Danan Gu (eds.). 2008. Healthy Longevity in China: Demographic, Socioeconomic, and Psychological Dimensions. Dordrecht: Springer Publisher.
      BOOKS written in Chinese:
      --The Chinese Longitudinal Healthy Longevity Survey Project (PI: Yi Zeng). 2000. The Data Book of the 1998 Wave of Chinese Longitudinal Healthy Longevity Survey (in both English and Chinese)..Beijing : Peking University Press
      --Zeng,Yi, Liu Yuzhi, Zhang Chunyuan, and Xiao Zhenyu (eds.). 2004. Analysis on Determinants of Healthy Longevity. Beijing: Peking University Press.
      --Zeng, Yi, Gu Danan, Xiao Zhenyu, Tao Liqun. 2005. Graphics of Socio-Demographic and Health Profiles of Oldest-Old in China. Beijing: China Population Press.
      --Liu, Yuzhi; Yuan, Ye, Zhen, Zhenzhen. 2007. A Research Study of the Oldest-old Chinese. Beijing: Population Publishing House.
      A couple of key articles:
      --Zeng, Yi, Chen Huashuai and Wang Zhenglian.2012.“Analysis on Trends of Future Home-based Care Needs and Costs for Elderly in China,” Economic Research, 2012, No. 10.
      --Zeng Y, Feng Q, Hesketh T, Christensen K, Vaupel JW (2017). Survival, disabilities in activities of daily living, and physical and cognitive functioning among the oldest-old in China: a cohort study. Lancet 2017; 389: 1619-29.
      Strength The data quality of survival and deceased elderly in CLHLS data has passed evaluation and is widely accepted by scholars all over the world. CLHLS has been the worldwide largest survey on oldest-old population aged 80+(who most likely need the care services) with compatible young-old elderly participants aged 65-79, and contains rich information, which has great potential for research.
      Weakness CLHLS did not include the 8 provinces/auto-regions (where the residents are mainly the minority groups whose age-reporting at oldest-old ages are not good) in the North-West part of China