The datafile is on one CD-ROM disc.
Documentation is on the disc.
Contains search and retrieval software. SETS 2.0, revision 805 should be installed to take full advantage of the latest capabilities. Y2K - not relevant. The NHDS is a continuous survey based on a sample of medical records of patients discharged from a national sample of these hospitals. Annual changes, referred to as addenda, may include assignment of new diagnostic and procedure codes, fourth and fifth digit expansion of codes, as well as code deletions.