Document Detail

Secular trends in socio-economic status and the implications for preterm birth.
MedLine Citation:
PMID:  16629692     Owner:  NLM     Status:  MEDLINE    
The rate of preterm birth in the developed world has been shown to be increasing, in part attributable to obstetric intervention. It has been suggested that this may be a differential increase between socio-economic groups. We aimed to assess whether the preterm rate in Norway is different in socio-economic groups defined by maternal education, and to determine the extent to which a difference is attributable to a socio-economic differential in obstetrical intervention, in terms of caesarean section or induction of labour. We used data from the Medical Birth Registry of Norway from 1980 to 1998 with preterm rate as the outcome and maternal educational level, marital status and obstetric intervention as exposure variables. In multivariable analyses, adjustment was made for maternal age, year of birth and birth order, and secular trends were assessed according to year of birth. The preterm birth rate was highest in the lowest socio-economic group. An increase of 25.2% in the preterm rate was seen over the observation period. No apparent differential was seen in the increase of the crude preterm rates between socio-economic groups, although in multivariable analyses there was a significant interaction between socio-economic group and time, implying a stronger effect of low education towards the end of the observation period attributable to demographic change. In conclusion, the preterm birth rate increased over time, but was mainly due to an increase in obstetric interventions. No closing of the gap between socio-economic groups was observed.
John M D Thompson; Lorentz M Irgens; Svein Rasmussen; Anne Kjersti Daltveit
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Paediatric and perinatal epidemiology     Volume:  20     ISSN:  0269-5022     ISO Abbreviation:  Paediatr Perinat Epidemiol     Publication Date:  2006 May 
Date Detail:
Created Date:  2006-04-24     Completed Date:  2006-08-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8709766     Medline TA:  Paediatr Perinat Epidemiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  182-7     Citation Subset:  IM    
The Medical Birth Registry of Norway, Locus of Registry Based Epidemiology, University of Bergen, Bergen, Norway.
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MeSH Terms
Cesarean Section / trends
Educational Status
Labor, Induced / trends
Marital Status
Mothers / education
Norway / epidemiology
Odds Ratio
Premature Birth / economics,  epidemiology*
Risk Factors
Socioeconomic Factors*

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