[EpiData-list] Selection of cases with special digits within a longer variable

epidata-list at lists.umanitoba.ca epidata-list at lists.umanitoba.ca
Tue Oct 27 06:18:05 CDT 2009

In Denmark, we have the unique CPR number consisting of birthdate (ddmmyy) followed by 4 numbers. If I have to select a population born in fx 1940 from a larger epidata-fil, I consider to use the export facility, but then need an observation filter only selecting those born in 1940, which means those numbered 40, in position 5 and 6 in the 10 digit CPR variable. Do anybody have knowledge of a relevant syntax for that?

Yours sincerely

Jes Lindholt
Ass. professor, PhD
Vascular Research Unit
Viborg Hospital, Denmark
E-mail: jes.s.lindholt at viborg.rm.dk

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