Consanguinity in Spain, 1911–1943: General methodology, behavior of demographic variables, and regional differences

From data on consanguineous marriages in Spain for 1911 to 1943 for the whole country and for four macro regions, the behavior and relationship of consanguinity and demographic variables, such as density, birth rate, death rate, and marriage rate, are demonstrated and discussed. Differences among macro regions for all the variables analyzed and a constant inverse and significant relationship between consanguinity level and density have been found. A clear relationship between socioeconomic development of the regions and consanguinity has not been found. The influence of each demographic variable in space and time is studied by partial correlation and multiple regression analyses