passages.id: split_6_test_2358_passage
passages.type: progene_text
passages.text: The target population consisted of all persons with Down syndrome in the period of 1948 - 1995 and the study population was divided into two subgroups : (1) Persons born in Israel between 1979 - 95 ( registry group ) and ( 2 ) Persons currently or past - institutionalised , born before 1979 ( institution group ) .