Document Detail

Trisomy 18 in Kuwait.
MedLine Citation:
PMID:  10480700     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Trisomy 18 (Edwards' syndrome, T18) is the second most common trisomy in man. We describe 118 children with regular T18 who were ascertained clinically and cytogenetically in the Kuwait Medical Genetics Centre during 1980-1997. METHODS: Ascertainment of T18 cases was performed shortly after birth. Chromosomal studies were carried out in addition to other relevant investigations. To investigate the factors associated with T18, a case-control study was carried out with 131 normal healthy newborns. Studied factors included maternal and paternal age, birth order, abortion, associated malformation, and survival. Multiple logistic regression analysis was used to adjust for confounding between variables. RESULTS: There was a preponderance of females among T18 cases (female:male ratio 2.1:1). The majority of T18 cases (53%) died before the second week of life. The most common associated anomalies were: congenital heart (38.1%) and gastrointestinal (25.4%). Multiplicity of malformations was also observed. Significant seasonal variation in T18 cases was detected with a peak in spring. Of the 118 T18 cases, 59 were delivered during 1994-1997 (average overall T18 birth prevalence rate 8.95 per 10 000 live births [95% CI: 6.66-11.23]). Concerning maternal age, 30.5% of the T18 cases' mothers were > or =35 years compared to 10.7% in the control group. The difference was statistically significant, P = 0.002. Logistic regression analysis showed that maternal age >30 years was a significant risk factor for T18, after adjusting for confounding with paternal age. Paternal age and abortion were not found to be significant risk factors. CONCLUSION: Trisomy 18 birth prevalence rate is high in Kuwait with advanced maternal age as a significant risk factor.
This paper describes associated factors of trisomy 18 (T18) or Edwards' syndrome among infants in Kuwait. A case control study of 131 normal newborn controls was undertaken. The study included information about gender, maternal age, paternal age, birth order, reproductive history, consanguinity, survival, and associated anomalies. Results showed a preponderance of females among T18 cases (female/male ratio, 2.1:1). The difference between the T18-case mothers and the control-group mothers was statistically significant (P = 0.002); however, there was no significant difference with regard to paternal age. The logistic regression analysis showed that the odds ratio for 2 abortions with reference to (0/1) abortion was 1.086, which is statistically significant as a risk for T18. The majority of children with T18 died before the second week of life. With regard to malformations, the most common associated anomalies were congenital heart and gastrointestinal abnormalities. Thus, the prevalence of T18 is high in Kuwait, with advanced maternal age as a significant risk factor.
K K Naguib; S A Al-Awadi; M A Moussa; L Bastaki; S Gouda; M A Redha; F Mustafa; S M Tayel; S A Abulhassan; D S Murthy
Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  International journal of epidemiology     Volume:  28     ISSN:  0300-5771     ISO Abbreviation:  Int J Epidemiol     Publication Date:  1999 Aug 
Date Detail:
Created Date:  1999-10-13     Completed Date:  1999-10-13     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7802871     Medline TA:  Int J Epidemiol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  711-6     Citation Subset:  IM; J    
Kuwait Medical Genetic Centre.
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MeSH Terms
Abnormalities, Multiple / epidemiology*,  etiology,  genetics
Age Distribution
Birth Rate
Chromosome Aberrations / epidemiology*,  etiology,  genetics
Chromosome Disorders
Chromosomes, Human, Pair 18*
Infant, Newborn
Kuwait / epidemiology
Maternal Age
Middle Aged
Paternal Age
Retrospective Studies
Risk Factors
Sex Distribution
Survival Rate

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

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