Integrated Health Interview Series (IHIS)

National Institute of Child Health and Human Development,  (R01 HD46697).   Principal Investigator:  Lynn Blewett; Co-Investigator:   Steven Ruggles.   http://www.ihis.us/

The National Health Interview Survey (NHIS), the principal source for information on the changing health of Americans, has been underutilized for the study of long-run change.  The Integrated Health Interview Series (IHIS) facilitates the study of long-term changes in U.S. health status, health care, and health behaviors by providing integrated annual data and documentation for the NHIS from the 1960s to the present.  Distributed for free over the internet, IHIS data include over 1000 variables, with observations on over 4 million persons.  IHIS multiplies the value of NHIS data by allowing researchers to make consistent comparisons through four decades of dramatic change in public health, and thus to study the health status of Americans as a dynamic process.