title: Statistical models for the twinning rate.
abstract: Linear regression models are used to explain the variations in the twinning rates. Data sets from different countries are analysed and maternal age, parity and marital status are the main regressors. The model building technique is also used in order to study the secular decline in the twinning rate. Linear regression technique makes it possible to compare the effect of different factors but the method requires sufficiently disaggregated data.
authors.affiliation: Folkhälsan Institute of Genetics, Population Genetics Unit, Helsinki, Finland.
authors.forename: J O
authors.initials: JO
authors.lastname: Fellman
authors.forename: A W
authors.initials: AW
authors.lastname: Eriksson
mesh_terms: D001315:Australia; D001723:Birth Rate; D003718:Denmark; D005260:Female; D005387:Finland; D006801:Humans; D007558:Italy; D008393:Marriage; D008423:Maternal Age; D008954:Models, Biological; D010298:Parity; D012044:Regression Analysis; D014427:Twins