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**National Health Interview Survey State Data Files**

The National Health Interview Survey **(NHIS)**    State Data files have been constructed to allow for the production of direct State    estimates. These files differ from the NHIS public-use data in that statistical noise at    both the variable level and record level have been added to allow for the protection of    respondent confidentiality and, at the same time, allow for release of the files with    State identifiers. States where the sample size is too small have been combined into    groups.

The NHIS State data files are only available in SAS version    6.06 format. A format library is provided to give the code structure for all variables.    Instructions for using the files and limitations of the files are included in the readme    files on each CD-ROM. Additional files included on the CD-ROM include several example SAS    programs demonstrating linkage to external ecologic data files and the use of sampling    weights. Complete NHIS survey documentation and file contents are on the **NHIS public-use CD-ROMs** and are not reproduced on the    State data file CD-ROMs.

**Ordering information**    This CD-ROM can be purchased from the National    Technical Information Service **(NTIS)**.    The order numbers and prices are:
Data        yearNTIS        order no.Price1994Contact NCHS 1993PB97-502074$60.001992Contact NCHS 1991PB97-502785$60.001990Contact NCHS 
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This page last reviewed May 10, 2000

**U.S.    DEPARTMENT OF HEALTH AND HUMAN SERVICES****Centers    for Disease Control and Prevention**    National Center for Health Statistics    Division of Data Services     Hyattsville, MD    20782-2003    (301) 458-4636
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