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Anencephalus: variation with maternal age, parity, social class and region in England, Scotland and Wales
Author(s) -
FEDRICK JEAN
Publication year - 1970
Publication title -
annals of human genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.537
H-Index - 77
eISSN - 1469-1809
pISSN - 0003-4800
DOI - 10.1111/j.1469-1809.1970.tb00217.x
Subject(s) - parity (physics) , demography , singleton , incidence (geometry) , social class , falling (accident) , geography , medicine , pregnancy , sociology , biology , environmental health , political science , mathematics , geometry , particle physics , law , genetics , physics
SUMMARY The analysis of 491 singleton anencephalic births compared with 16,994 control births has revealed several independent trends within the United Kingdom: (i) There is a strong regional distribution. (ii) There is a rise in incidence with falling social class. (iii) There is a maternal age/parity distribution, whereby the older the primipara the lower is the incidence, but the older the multipara, the higher the incidence.