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The New Danish Twin Register: Establishment and Analysis of Twinning Rates

The New Danish Twin Register: Establishment and Analysis of Twinning Rates Abstract Background. Twin registers provide a valuable source for research into disease causation. The existing population-based registers comprise mostly old twins. In order to be able to study diseases which occur in childhood and youth a new Danish twin register has been established. Methods. The register is based on the Danish Civil Registration, with Information on number of twin births from the Danish Vital Statistics Office as the source of validation. All twins resident in Denmark at 1 March 1991 were sent a one side questionnaire asking about diabetes, willingness to participate in other research projects and similarity in the twins. Results. The register comprising 20 888 twin pairs, covers 74.4% of all twin pairs born 1953–1967 (incl.) and 97.4% of those born 1968–1982 (incl.). The response rate to the questionnaire study was 92.3%. The responders represented 19 180 twin pairs distributed as 5304 monozygotic pairs, 6861 same-sex dizygotic pairs, 6244 opposite-sex dizygotic pairs and 771 pairs of unknown zygosity. Of the respondent twins, 96% declared their willingness to participate in additional studies. An analysis of trends in the twinning rates for the years 1968–1982 showed that the rate of monozygotic twinning is increasing and the twinning rate of opposite-sex twin pairs is decreasing. Conclusions. Earlier estimated trends in twinning rates have been confirmed. Due to the high response rate and opportunities for linkage with other Danish registers, the present material provides a valuable resource for twin studies in diseases and human traits. This content is only available as a PDF. © International Epidemiological Association http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Epidemiology Oxford University Press

The New Danish Twin Register: Establishment and Analysis of Twinning Rates

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References (27)

Publisher
Oxford University Press
Copyright
© International Epidemiological Association
ISSN
0300-5771
eISSN
1464-3685
DOI
10.1093/ije/24.3.589
Publisher site
See Article on Publisher Site

Abstract

Abstract Background. Twin registers provide a valuable source for research into disease causation. The existing population-based registers comprise mostly old twins. In order to be able to study diseases which occur in childhood and youth a new Danish twin register has been established. Methods. The register is based on the Danish Civil Registration, with Information on number of twin births from the Danish Vital Statistics Office as the source of validation. All twins resident in Denmark at 1 March 1991 were sent a one side questionnaire asking about diabetes, willingness to participate in other research projects and similarity in the twins. Results. The register comprising 20 888 twin pairs, covers 74.4% of all twin pairs born 1953–1967 (incl.) and 97.4% of those born 1968–1982 (incl.). The response rate to the questionnaire study was 92.3%. The responders represented 19 180 twin pairs distributed as 5304 monozygotic pairs, 6861 same-sex dizygotic pairs, 6244 opposite-sex dizygotic pairs and 771 pairs of unknown zygosity. Of the respondent twins, 96% declared their willingness to participate in additional studies. An analysis of trends in the twinning rates for the years 1968–1982 showed that the rate of monozygotic twinning is increasing and the twinning rate of opposite-sex twin pairs is decreasing. Conclusions. Earlier estimated trends in twinning rates have been confirmed. Due to the high response rate and opportunities for linkage with other Danish registers, the present material provides a valuable resource for twin studies in diseases and human traits. This content is only available as a PDF. © International Epidemiological Association

Journal

International Journal of EpidemiologyOxford University Press

Published: Jun 1, 1995

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