2012 National Hospital Ambulatory Medical Care Survey Data Files and File Documentation WARNING - DATA USE RESTRICTIONS! Read Carefully before Using The Public Health Service Act (Section 308 (d)) provides that the data collected by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention (CDC), may be used only for the purpose of health statistical reporting and analysis. Any effort to determine the identity of any reported case is prohibited by this law. NCHS does all it can to assure that the identity of data subjects cannot be disclosed. All direct identifiers, as well as any characteristics that might lead to identification, are omitted from the dataset. Any intentional identification or disclosure of a person or establishment violates the assurances of confidentiality given to the providers of the information. Therefore, users will: 1. Use the data in this dataset for statistical reporting and analysis only. 2. Make no use of the identity of any person or establishment discovered inadvertently and advise the Director, NCHS, of any such discovery. 3. Not link this dataset with individually identifiable data from other NCHS or non-NCHS datasets. By using these data, you signify your agreement to comply with the above-stated statutorily based requirements. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * The Emergency Department (ED) component of the 2012 National Hospital Ambulatory Medical Care Survey is included in this data release. For ease of transmission, the data file has been converted into a zipped (compressed) format which must be uncompressed prior to use. To uncompress, you can do the following: 1) Create a new folder on your local workstation, for example, C:\MYFILES\NHAMCS2012 2) Download to the new folder the file ED2012.zip from the FTP server: ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/Datasets/NHAMCS/ 3) Right-click on the name of the compressed file from your directory screen. On the pop-up menu, there should be an option to extract the file to a location of your choosing. In the past, the NHAMCS documentation was produced in multiple files which were then compressed into a single self-extracting file in ASCII format. Beginning with 1999, the documentation file has been produced as a single file in PDF format which can be viewed or downloaded from the above address. This file is not compressed. Size (bytes) File Name File Description Compressed Uncompressed ed2012.ZIP NHAMCS Emergency Department file 2.6 MB 40.4 MB doc12_ed.PDF NHAMCS ED documentation file 1.1 MB CAUTION - Because the NHAMCS is a sample survey, the application of weights to the sample data is REQUIRED to produce national estimates of outpatient and emergency department visits, as well as to accurately assess the sampling error of statistics based on the survey data. Please refer to the documentation for instructions on how to apply the weights and to obtain relative standard errors of national estimates. For questions, suggestions, or comments concerning NHAMCS data, please contact the Ambulatory Care Statistics Branch at (301) 458-4600. These and other survey data are also available on CD-ROM and public use data tape, as well as in published summaries. For additional information on NCHS data products, contact the: Office of Information Services, NCHS 3311 Toledo Road Hyattsville, MD 20782 Tel: (301) 458-4636 E-mail: nchsquery@cdc.gov Internet: http://www.cdc.gov/nchs/