title: Socioeconomic, demographic, and geographic variables affecting the diverse degrees of consanguineous marriages in Spain.
abstract: In a population the inbreeding coefficient alpha is determined by the relative incidence of the various degrees of consanguineous marriages--uncle-niece or aunt-nephew (C12), first cousin (C22), first cousin once removed (C23), second cousin (C33)--which may be related to temporal, geographic, demographic, and economic factors. Using published information from Spain corresponding to urban and rural areas, in this article we seek to establish how each specific relationship behaves with respect to geographic, demographic, and socioeconomic factors, to determine differential urban-rural patterns, and to study whether the diverse types of consanguineous matings relate homogeneously to these factors. For this purpose we performed multiple regressions in which the dependent variables were the different degrees of consanguinity previously selected and the independent variables were geographic, demographic, and economic factors. Our results indicate that the various types of consanguineous marriages in Spain are more conditioned by geographic, demographic, and economic variables than by the inbreeding level alpha (the coefficient of determination was between 0.22 and 0.72; the maximum for alpha was 0.35). A regional pattern exists in Spain and corresponds to close and to remote kinship, which may be mainly related to economic and family factors. Close relationships appear to be more associated with economic variables, whereas second-cousin marriages correspond largely to rural areas of the Spanish Central Plateau.
authors.affiliation: Departamento de Zoología y Antropología Física, Facultad de Biología, Universidad Complutense de Madrid, 28040 Madrid, Spain.
authors.forename: V
authors.initials: V
authors.lastname: Fuster
authors.forename: S E
authors.initials: SE
authors.lastname: Colantonio
mesh_terms: D002410:Catholicism; D003241:Consanguinity; D003469:Culture; D003710:Demography; D005843:Geography; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D015994:Incidence; D016014:Linear Models; D008393:Marriage / Q000208:ethnology / Q000266:history / Q000706:statistics & numerical data*; D012424:Rural Population / Q000706:statistics & numerical data*; D012959:Socioeconomic Factors; D013030:Spain; D014186:Transportation; D014505:Urban Population / Q000706:statistics & numerical data*