2006-12-07 On 2006-05-18, the data producer
resupplied the data file and codebook documentation. 20 variables were
modified, 11 variables were dropped, and 10 new variables were added.
Some of these changes were to correct for data errors, but most of
these changes were done to provide consistency with the 2004 NSDUH
study. Of these changes, the most important change to note is that two
study design variables (VEREP and VESTR) were revised to provide
consistency with the 2004 study, which collapsed the strata in order
to maximize the number of people in each replicate.
2003-02-06 ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:
- Performed consistency checks.
- Created online analysis version with question text.
- Checked for undocumented or out-of-range codes.
2013-06-25 Released Methodological Resources documentation and updated xml file to include variable groupings.
2004-03-25 Data producer resupplied data and
documentation. There were 38 new variables, the INCOME variable was
dropped, and the following variables had either data and/or
documentation changes: OTDGNDLA, II2HALRC, IIHALFY, II2HALFY, IIHALFM,
II2HALFM, CIGCRAVE, CIGCRAGP, YSPED, YSCHL, CIGINET, CIGFRND, CIGVEND,
CIGMAIL, CIGCKOUT, CIGCLERK, CIGSMKT, CIGDSTO, CIGCONV, CIGINDIV,
YTHBGHT, IILSDRC, II2LSDRC, IIPCPRC, II2PCPRC, IIECSRC, II2ECSRC,
IIMTHRC, II2MTHRC, IIMTHFY, II2MTHFY, NRCH17_2, IISLTYFU, MTHYR,
MTHMON, DRIVALC, DRIVDRG, and DRIVALD.