Gynecology & Obstetrics
Open Access

Kazuo Hayakawa

Publications

• Research Article
  Infant Mortality Attributable to Birth Defects in Singletons and Twins in Japan, 1995-2008
  Author(s): Yoko Imaizumi and Kazuo HayakawaYoko Imaizumi and Kazuo Hayakawa
  
  Objective: To evaluate the Infant Mortality Rate (IMR) associated with birth defects in singletons and twins and to identify risk factors for IMR. Study design: IMR was estimated using Japanese vital statistics from 1995 to 2008. Results: All IMRs associated with birth defects significantly decreased from 1995 to 2008 for both singletons and twins. IMR was approximately 3-fold higher in the latter than in the former during the period 1995–2008. In contrast, IMR with chromosomal abnormalities was the same in singletons and twins. The proportion of infant deaths associated with all birth defects among the total number of infant deaths was nearly constant (40%) during the examination period in singletons. In contrast, the value in twins was 20% in 1995 and increased to 25% in 2008. During the period, IMR significant.. View More»
  DOI: 10.4172/2161-0932.1000150

  Abstract PDF

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