The 1994, 1995, and 1996 NSAS datasets are located in:
 ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/Datasets/NSAS
The documentation files for the 1994, 1995 and 1996 NSAS dataset are located in:
 ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NSAS

The dataset files listed below have been compressed into three separate files. To load and expand
them, use a ZIP extraction program (such as PkZip) to install this data in a directory (folder) on your hard drive.  The documentation is in .pdf format.

                                                                                                 Size (bytes)
File Name             File Description                     Compressed              Uncompressed

NSAS94.ZIP            NSAS dataset files                   1,565,000                 11,668,000
NSAS95.Zip            NSAS dataset files                   1,563,000                 12,034,000
NSAS96.ZIP            NSAS dataset files                   1,624,000                 12,417,000
NSAS94-96DOC.pdf  NSAS documentation files                                               68,076   
                   
The documentation files listed below are referenced in the above ( NSAS94-96DOC.pdf) file. 
These files are in lotus format.

1yr-94.WK1                                  		                                 36,746
1yr-95.WK4                                                                               38,788
1yr-96.WK4                                                                               44,708
nsasstdr.WK4                                                                            117,624
REG94.WK1                                                                                31,318
REG95.WK4                                                                                31,692
REG96.WK4                                                                                30,704
                                                                    

                         Total compressed file size (data only) = 4,752,000
                                       Total inflated file size = 46,187,076

CAUTION - Because the NSAS is a sample survey, the application of weights to the sample
data is needed in order to produce national estimates of surgical and nonsurgical procedures done
on an ambulatory basis in hospital and freestanding ambulatory surgery centers. 

Statement of Authenticity:  This material has been cleared for public distribution by
CDC/ATSDR and will be authentic if obtained directly from ftp.cdc.gov. CDC/ATSDR takes all
effort to assure the authenticity of electronically distributed documents. However, in all instances
where the electronic and official agency record differ, the authenticity of the official agency
record is controlling. 

For questions, suggestions, or comments concerning NSAS data, please contact the National
Survey of Ambulatory Surgery at (301) 458-4409.  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) 458-4321
                                               E-mail: nchsquery@cdc.gov
                                               Internet: http://www.cdc.gov/nchswww/default.htm