Subsequently,job titles of all jobs coded to 97000(response unidentifiable) and 99000 (response outside scope) were hand –checked in cluding cross- checked against original questionnaires where necessary to see if these could be coded (by a.h. ). Nzsco-99 codes were then back-mapped to isco-88 by snz to permit the use of the aloha jem. Hand-checking of 475 one –to-many mappings was conducted (by a.h. with advice from j.p.z.). Queries were cross-checked with the original questionnaires where necessary and cleaning was also conducted with respect to start and finish years(eg,finish year before start year, years not compatible with age).
Outcomes