Codes and Frequencies
KIDNYMISYRC indicates whether the person had a chronic missing kidney in the past year. This variable is created with supplemental programming by the IPUMS NHIS staff from the pre-1997 condition records. For general information about IHIS variables (such as KIDNYMISYRC) created from the pre-1997 condition records, see the User Note on Condition Records and Condition Variables.
Defining Missing Kidney Records and Identifying Persons with a Missing Kidney
For all available years, persons who were asked a direct question about having a missing kidney and who have a chronic missing kidney condition record are given a "Yes" code for KIDNYMISYRC. Persons who were asked a direct question about having a missing kidney but do not have a chronic missing kidney record are given a code of "No." Persons who were not asked a direct question about a missing kidney, or for whom it is unknown whether they were asked such a question, are given a code of "NIU" (not in universe), regardless of whether they have a chronic missing kidney record.
For all available years (1984 to 1996), chronic missing kidney records were defined as those condition records with a code of "215" ("Absence, kidney") in the variable C1CONDRC in the original NHIS public use files. This condition code value comes from NCHS's Diagnostic Recode C: Chronic Conditions and Impairments.
For all available years (1984-1996), KIDNYMISYRC should be weighted with CONDWT4.
- 1984-1996: Persons living in 1/6 of households (who received Condition List 4).
- 1984-1996 : CONDWT4