Document Detail

Perinatal mortality in triplet births in Japan: time trends and factors influencing mortality.
MedLine Citation:
PMID:  12626221     Owner:  NLM     Status:  MEDLINE    
Perinatal mortality rates (PMRs) in triplets were analyzed using Japanese Vital Statistics during the period of 1980-1998. The total number of perinatal deaths in triplets was 1051. The PMR significantly decreased from 214 per 1000 births in 1980 to 39 in 1998, a reduction of 82%. PMRs in triplets were 11.1-fold higher in 1980 and 6.9-fold higher in 1998 than in singletons, indicating that PMRs improved more in triplets than in singletons during the last two decades in Japan. The PMR was the highest in the third-born, followed by the second- and the first-born triplets in each period. As for maternal age, the PMR was 1.5-3.7 times higher in the < 25 years of age group than the other age groups. Additionally, the PMR was the lowest for birthweight (BW) >or= 2000 g during the entire period. In addition, the PMR decreased with gestational age (GA) of up to 38-39 weeks and increased thereafter. The effects of BW on the PMR were stronger than the effects of GA. The proportion of perinatal deaths in triplets with extremely low BW (< 1000 g) was 74% in 1980-1989 and increased to 82% in 1990-1998. The declining PMR was unlikely to be due to the improvement in BW in triplets. It is likely that it was related to the improved medical management of triplets during the perinatal period and the first week of life. Information obtained in the present study may be useful in counseling pregnant woman about triplet births.
Yoko Imaizumi
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Twin research : the official journal of the International Society for Twin Studies     Volume:  6     ISSN:  1369-0523     ISO Abbreviation:  Twin Res     Publication Date:  2003 Feb 
Date Detail:
Created Date:  2003-03-10     Completed Date:  2003-05-27     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9815819     Medline TA:  Twin Res     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  1-6     Citation Subset:  IM    
Faculty of Health Science, Hyogo University, Japan.
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MeSH Terms
Birth Order
Birth Weight
Gestational Age
Infant Mortality / trends*
Infant, Newborn
Japan / epidemiology
Maternal Age
Risk Factors
Triplets / statistics & numerical data*
Vital Statistics
Erratum In:
Twin Res. 2003 Apr;6(2):ii

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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