Document Detail

Multiple maternities and neighborhood income.
MedLine Citation:
PMID:  17564531     Owner:  NLM     Status:  MEDLINE    
This study aimed to examine differences in multiple maternities by neighborhood-income levels in Toronto, Canada. Hospital records were used to perform secondary analysis of 144,731 maternities resulting in single or multiple infants live-born to mothers residing in the City of Toronto 1996 to 2001. The independent variable was neighborhood income, defined as mean household neighborhoodincome quintiles. Multiple logistic regression analysis was used to compute adjusted odds ratios (AORs) and 95% confidence intervals (CIs). Differences by income levels were found in twin maternities but not in higher order maternities. Twin maternities were more likely to occur in the richest neighborhood-income quintile compared to the rest of the population (AOR: 1.25, 95% CI: 1.10-1.41), after adjustment for potential confounders. The positive association between high neighborhood income and twin maternities found in this study suggests that the richest neighborhoods select families whose characteristics pose them at increased risk of having twins. Further studies are needed to clarify the underlying mechanisms leading to socioeconomic differences in multiple births.
Marcelo Luis Urquia; John William Frank; Richard Henry Glazier; Rahim Moineddin
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Twin research and human genetics : the official journal of the International Society for Twin Studies     Volume:  10     ISSN:  1832-4274     ISO Abbreviation:  -     Publication Date:  2007 Apr 
Date Detail:
Created Date:  2007-06-13     Completed Date:  2007-08-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101244624     Medline TA:  Twin Res Hum Genet     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  400-5     Citation Subset:  IM    
Centre for Research in Inner City Health, St Michael's Hospital, Toronto, Canada.
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MeSH Terms
Cross-Sectional Studies
Infant, Newborn
Pregnancy, Multiple / statistics & numerical data*
Reproductive Techniques, Assisted / economics,  utilization
Residence Characteristics
Retrospective Studies
Socioeconomic Factors

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