The Integrated Fertility Survey Series (IFSS) project at ICPSR is pleased to announce its sixth data release: the Contraceptive Calendar file. The Contraceptive Calendar file is a respondent-level data set that provides information on contraceptive use in each month for up to 4 years prior to the survey month. Contraceptive Calendar variables are available for the 1973, 1976, 1982, 1988, 1995 and 2002 NSFG surveys. This data set can be merged with previously released respondent-level data to provide an in-depth look at contraceptive behavior over time.
IFSS has also added Comparable Sample variables to both the Respondent and Interval files to allow users to generate consistent samples across time, taking into account the changing sampling frames across surveys. More information on these variables can be found in their comparability notes (e.g., IFSS_CS1955). We have also updated the IFSS User Guide and Using IFSS Extracts. A handful of additional pregnancy interval variables have also been added to the Interval file.
Comparability notes describing issues relating to each harmonized variables are available by clicking on the variable name on the Harmonized Data Extracts page.
The Contraceptive Calendar data are available for download on the Data and Documentation page, can be explored and extracted from the Harmonized Data Extracts page, and can be analyzed online using SDA.
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 late 2012. As such, they are subject to change and may contain inconsistencies. If you notice any problems with the data, please contact the IFSS team at IFSSGroup@umich.edu so that we may fix them.