------------------- NHIS LOG: DATA YEAR 1991 -------------------- Original release The data files for calendar year 1991 were first made available on magnetic tape. Documentation was provided on paper. NHIS FILE TYPE FILE NAME LENGTH # RECS ------------------- --------- ------ ------- HOUSEHOLD HOUSEHLD 335 48,853 PERSON PERSONSX 335 120,032 CONDITION CONDITON 335 88,074 DOCTOR VISIT DRVISITX 335 26,559 HOSPITAL HOSPITAL 335 12,261 AIDS K AND A AIDSKNOW 474 42,725 CHILD HEALTH CHLDHLTH 700 17,102 DRUG AND ALC DRUGALCO 512 21,174 ENVIRON HEALTH ENVRHLTH 340 120,032 FAMILY RESOURCE FAMLYRES 520 120,032 HEARING HEARINGX 364 120,032 HPDP SAMPLE PER HPDPSAMP 975 43,732 LSOA VERSION4 1 LSOA41PR 2359 7,527 LSOA VERSION4 2 LSOA42MA 70 12,470 LSOA VERSION4 3 LSOA43MB 35 5,011 PREGNANCY SMOK PREGSMOK 428 29,239 UNINTENT INJURY UNINJURY 357 120,032 April, 1999 -- Corrected Condition file Corrections to the 1982-1994 Condition files were released on the Internet to fix a problem with injury-related episode fields. All future distributions of the Condition files contained the corrected values. July, 1999 -- Issue of Imputed Annual Family Income 1990-96 files (CD-ROM Series 10, No. 9A ASCII Version) The Imputed Annual Family Income 1990-96 files containing responses to the two annual family income questions from the core NHIS questionnaire with imputed values substituted for missing values were released on CD and on the Internet. For more information on this release, see http://www.cdc.gov/nchs/products/elec_prods/subject/impute.htm June, 2006 -- Internet release All previously-released data files and their associated documentation files, except for the Longitudinal Study on Aging (LSOA) files were made available on the Internet. Information about LSOA files can be found at http://www.cdc.gov/nchs/lsoa.htm. ----------------------------------------------------------------- August 29, 2011 -- 1991 Pregnancy and Smoking supplement Missing file layout added to the file named PREGSMOK.pdf ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NHIS/1991/ ----------------------------------------------------------------- To obtain the Internet release of the 1991 NHIS data, visit the NHIS home page: http://www.cdc.gov/nchs/nhis.htm and click on: Questionnaires, Data Sets and Related Documentation ----------------------------------------------------------------- Users are encouraged to join the HISUSERS Listserv and receive E-mail announcements of updates to the NHIS files. To join the Listserv, visit the website at: http://www.cdc.gov/nchs/about/major/nhis/nhislist.htm ----------------------------------------------------------------- Questions about the NHIS? Contact: Division of Health Interview Statistics National Center for Health Statistics 3311 Toledo RD RM 2217 Hyattsville MD 20782 E-mail: nhislist@cdc.gov Voice: 301-458-4901 FAX: 301-458-4035 Home Page: http://www.cdc.gov/nchs/nhis.htm -----------------------------------------------------------------