1 "full sibs" -- biological mom and dad are known for both sibs, and both parents are in common 2 "half sibs, mom in common" -- biological mom and dad are known for both sibs, and only the mom is in common 3 "half sibs, dad in common" -- biological mom and dad are known for both sibs, and only the dad is in common 4 "at least half sibs, mom in common" -- biological mom known for both sibs (but bio dad not known for both sibs), and the sibs have the same bio mom 5 "at least half sibs, dad in common" -- biological dad known for both sibs (but bio mom not known for both sibs), and the sibs have the same bio dad 6 "all others"
SAS System File ASCII with ... SAS Statements (.sas) SPSS Statements (.sps) STATA Statements (.do) EXCEL spreadsheet
--------------------- The Long Sibling File The file structure and the code definitions of the "long" file are as below: Name Label Format ID68 "1968 INTERVIEW # OF INDIVIDUAL " Z4. PN "PERSON # OF INDIVIDUAL " Z3. SEX "GENDER OF INDIVIDUAL " F1. SIBNUM "SIBLING NUMBER " F2. ID68S "1968 INTERVIEW # OF SIBLING " Z4. PNS "PERSON # OF SIBLING " Z3. SIBSEX "GENDER OF SIBLING " F1. SIBTYPE "TYPE OF SIBLING " F1. PSTRING "PARENTS STRING " $10. SIBMAKER "SIBLING MAKER " $30. Variable Codes: SEX, SIBSEX 1 = MALE 2 = FEMALE PSTRING and SIBMAKER columns are defined using the codes below: 1 = Biological Mother 2 = Biological Father 3 = Adoptive Mother 4 = Adoptive FatherPSTRING: column describes about the "known" parents of the individual and sibling pair. The string has two parts separated by a "-"; where the left part is parents information of the individual and the right part is parents information of the sibling. A value of "1200-0200" means that biological mother and father of the individual are know and only biological father of sibling is known for the given pair.
SIBMAKER: column reports about the "common" parents of the individual and sibling pair. A value of "(1-1)" means that biological mothers are common for the pair.
Sibling Type values are determined by inspecting the values from these two columns.