The Christchurch Health and Development Study (CHDS) has been in existence for 35 years.
During this time we have followed the health, education and life progress of a group of 1,265 children born in the Christchurch (New Zealand) urban region during mid 1977.
This cohort has now been studied from infancy into childhood, adolescence and adulthood.
The data gathered over the course of the study now comprises some 50 million characters of information describing the life history of this cohort.
The study has published over 400 scientific papers, reports, books and book chapters describing the 30 year life history of the CHDS cohort.