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雷达卡
Dear Current and Future Users of the “China Health and Nutrition Survey” (CHNS):
We are pleased to announce a number of major changes in the CHNS. We are finalizing data for the CHNS 2011 and have released all data collected in 2011 and previous years. This is expanded by adding Shanghai, Beijing and Chongqing, the three mega municipalities in China. These are added with modern sampling but follow similar procedures for the collection of the 480 households and their members in each mega city.
We have updated all datasets by creating a unique individual ID (IDind) for all participants. Each participant will have the same ID in all datasets and in all survey years. The unique ID will not change over time and will facilitate data merges across datasets and survey years. This has been a major effort of ours which took a great deal of time but should facilitate your use of the data greatly.
We have updated physical examination (PE) and physical activity (PA) data and made two separate longitudinal datasets available: variables related to PE and lifestyles are in the longitudinal PE dataset; variables related to types and time spent on PA are in the longitudinal PA dataset. We have standardized all physical activity variables and made the PA dataset more user-friendly.
We have recreated a new relationship dataset that contains relationships between one household member and all other members in the same household. We also included relationships to members in their original household if they moved to a different household.
We have released our detailed urbanization scale measures with all 12 dimensions measured along with full documentation. We have also provided a large array of added documentation to other measures provided in the survey. A recent study reported that our urbanization scale has the highest quality score (Cyril et al. BMC Public Health 2013, 13:513. http://www.biomedcentral.com/1471-2458/13/513).
We have updated community data request system. Researchers who are interested in using our community data or linking their datasets to ours can submit their requests online (http://www.cpc.unc.edu/projects/china/data/linkages). This will expedite the review process and researchers can get the community data faster. As you will see when you review this new webpage, we will then create secure options for you downloading you requested data once approved so that the process of getting data to you is also much quicker. Once your payment is received, which unfortunately we cannot automate, we can then quickly proceed to provide the data.
This has been a joint project of the National Institute of Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, and the University of North Carolina at Chapel Hill. Our joint teams have always been involved in its design, implementation and computerization. Since its inception in 1988 and first implementation the following year as a small poorly funded private option, our goal has been to create and disseminate a very high quality, multipurpose set of community, household, and individual data to users across the globe.
We will continue to make all data available to the public again at no cost. There is, however, a major request that is essential for us to continue funding. We need to have you cite this acknowledgment in all theses, book chapters, and papers. And we will be adding a new feature to our website so you can upload your references to our website or else email them to us. We need this once they are published with full citations. This will be a requirement of all future IRB submissions and confidentiality requirements for access to the CHNS data.
"This research uses data from China Health and Nutrition Survey (CHNS). We thank the National Institute of Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, Carolina Population Center, the University of North Carolina at Chapel Hill, the NIH (R01-HD30880, DK056350, and R01-HD38700) and the Fogarty International Center, NIH for financial support for the CHNS data collection and analysis files since 1989 and both parties plus the China-Japan Friendship Hospital, Ministry of Health for support for CHNS 2009."
Finally, both the University of North Carolina’s Carolina Population Center team headed by Barry Popkin and the teams in China headed by Bing Zhang will continue to coordinate and run the survey. We have received funding from NIH for the next survey circle of 2014-2019. We will continue to provide access to the datasets and to support this long-term longitudinal survey.
Please visit our website www.cpc.unc.edu/projects/china for more information. Please address your questions, if you have any, to our project manager at chns@unc.edu.
Sincerely yours,
Barry M. Popkin
W. R. Kenan, Jr. Distinguished Professor of Global Nutrition
Fellow, Carolina Population Center
University of North Carolina at Chapel Hill
Bing Zhang
Professor of Nutrition
National Institute of Nutrition and Food Safety
Chinese Center for Disease Control and Prevention
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