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Mortality Rate of Japanese Twins and Triplets II. Socioeconomic Factors Influencing Infant Deaths of Twins After Birth to One Year of Age

Published online by Cambridge University Press:  01 August 2014

Yoko Imaizumi ,
Eiji Inouye  and
Akio Asaka
Yoko Imaizumi*
Affiliation:
Institute of Population Problems, Ministry of Health and Welfare, Tokyo
Eiji Inouye
Affiliation:
Institute for Developmental Research, Aichi Prefectural Colony, Aichi
Akio Asaka
Affiliation:
Institute of Brain Research, University of Tokyo School of Medicine, Tokyo
*
Institute of Population Problems, Ministry of Health and Weifare, 1-2-2 Kasumigaseki, Chiyoda-ku, Tokyo 100, Japan

Abstract

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The rates of infant mortality of twin individuals were 4.38% and 7.76% for mothers healthy and nonhealthy after delivery, respectively, and the difference is significant at the 0.01 level. The lowest infant mortality rate was seen in the mothers with paid work during pregnancy (4.56%), followed by the mothers engaged only in housekeeping (4.72%) and by those self-employed during the pregnancy (4.99%). Infant mortality rate for MZ twins decreased with increased monthly expenditure of the household, whereas the rate for DZ twins remained constant with expenditure. Socioeconomic factors still affect the infant mortality of twins, and the infant mortality rate can be improved.

Keywords

Infant mortalityTwinsSocioeconomic factors
Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 30 , Issue 4 , October 1981 , pp. 275 - 280
Copyright
Copyright © The International Society for Twin Studies 1981

References

REFERENCES

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