Codes and Frequencies
For sample persons under 5 years old, HEADSTIFFEV reports, while lying on his or her back and being pulled up to a sitting positon, if the child has ever hold head stiffly so that it DID NOT hang back as he or she was pulled up.
Child motor and social development variables should be combined with AGE, BIRTHMO (Month of birth), and INTERVWMO (Month of NHIS interview) to provide complete information about the child's developmental progress. For more information on how the child's specific age is relevant to this variable, please see HEADTURNEV.
For related variables, please use the IPUMS NHIS search function and drop-down menus.
- 1981: Sample persons under age 5.
- 1981 : SAMPWEIGHT