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What are the identifiers on the file?

April 26, 2017file identifiers

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What are the identifiers on the file?

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There are three identifiers on the file for merging and sorting. MOTHID is the mothers identifier. FATHID is the fathers identifier. IDNUM is the family identifier. The identifiers will remain fixed throughout the waves. The IDNUM is a 4 character string variable. The MOTHID consists of the 4 character IDNUM with an additional “0” at the end. The FATHID consists of the 4 character IDNUM with an additional “1” at the end. Each MOTHID or FATHID is followed by a “1,” “2,” or “3” indicating the baseline, one-year, or three-year follow-up (i.e. MOTHID1 and FATHID1 (baseline) – MOTHID2 and FATHID2 (one-year)).