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Institute of Health Sciences
tel.+358 8 537 56001
fax +358 8 537 5661
Box 5000
90014 University of Oulu

University of Oulu
FACULTY OF MEDICINE, Institute of Health Sciences

Northern Finland Birth Cohort 1986 Studies, NFBC 1986


Description of the NFBC 1986 -study

NFBC1986 is a longitudinal one-year birth cohort study from an unselected population. The cohort included all the mothers (N = 9 362) with children whose expected date of birth felt between July 1st 1985 - June 30th 1986 in the two northermost provinces on Finland (Oulu and Lapland). A small percentage of the births occurred towards the end of June 1985 and begin of July 1986. The number of deliveries in the cohort was 9 362, which was 99% of all the deliveries taking place in the target period of the cohort.

Altogether 9 479 children were born into the cohort, 9 432 of them live-born. The original data have been supplemented by data collected with postal questionnaires at the ages of 7, 8 and 15 / 16 years and various hospital records and statistical register data.


Number of children born