1992 National Hospital Ambulatory Medical Care Survey Data File 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. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Please continue to next page. - 1 - The files listed below comprise the 1992 National Hospital Ambulatory Medical Care Survey with complete file documentation. The data files are in ASCII format; the documentation file is in PDF format and requires an Adobe Acrobat reader which may be downloaded at the NCHS website: www.cdc.gov/nchs/ The 1992 NHAMCS dataset includes two files, one for emergency department data and another for outpatient department data. These are located in: ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/Datasets/NHAMCS The documentation files for the 1992 NHAMCS dataset are located in: ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NHAMCS For ease of transmission, the data files have been converted into a self- extracting compressed format. To load and expand the NHAMCS data files, do the following: first, copy the compressed file onto your hard drive into an appropriate subdirectory (for example, NHAMCS). Then go to the DOS prompt in that subdirectory and type the name of the file (ed1992) without its extension. Do the same for the opd1992 file. The documentation file (doc92.pdf) is in PDF format and can simply be downloaded. It is a scanned version of an original hardcopy document. Size (bytes) File Name File Description Compressed Uncompressed ED1992.EXE NHAMCS Emergency department file 1.1 MG 12.2 MG OPD1992.EXE NHAMCS Outpatient department file 938 KB 12.2 MG DOC92.PDF NHAMCS documentation file 10.8 MG The documentation file includes the following sections: Description of the NHAMCS Format of the emergency department micro-data file Format of the outpatient department micro-data file Marginal data Relative standard errors Definition of terms used in the NHAMCS Patient Record forms - instructions and definitions Reason for Visit Classification List of generic codes and names List of drug entry codes and names List of National Drug Code Directory drug classes Data user questionnaire 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 sections, "Description of the NHAMCS" and "Relative Standard Errors" in the documentation file for information on how to obtain relative standard errors of national estimates. Please continue to next page. - 2 - 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: Data Dissemination Branch, NCHS 6525 Belcrest Rd. Hyattsville, MD 20782 Tel: (301) 458-4009 E-mail: nchsquery@cdc.gov Internet: http://www.cdc.gov/nchs/ - 3 -