Comparability notes, describing the details of harmonization and any comparability issues users should be aware of, are available for every variable by clicking on the variable name.
Additional information about imputation flags, weighting, and other issues can be found in the IFSS User Guide.
Contraceptive calendar variables can be added to the extract at the end of the extraction process, or downloaded from the Data and Documentation page. Comparability notes for the 6 calendar variables can be accessed by selecting Variable Group: Contraceptive Calendar.
Please note that all IFSS data releases are beta versions provided for users to begin using the data before the final version is released in early 2013. As such, they are subject to change and may contain small inconsistencies. If you notice any problems with the data, please contact the IFSS team at IFSSGroup@umich.edu so that we may fix them.
In the 1988 NSFG, the weight variable is scaled differently than in other
years. To estimate population counts or make comparisons using other
surveys, the variable IFSS_WEIGHT needs to be divided by 100 in the 1988
NSFG. The weight variable will be modified in future releases of the data.
In the current version of the data, the weight can be adjusted using the
IF IFSS_SOURCE=1988 THEN IFSS_WEIGHT=IFSS_WEIGHT/100;
replace IFSS_WEIGHT=IFSS_WEIGHT/100 if IFSS_SOURCE==1988