Polymorphisms in folate-metabolizing genes, chromosome damage, and risk of Down syndrome in Italian women: identification of key factors using artificial neural networks

Table 2 Demographic characteristics of the study population

Study group	Number of subjects	Age at delivery mean ± S.D.	Age at sampling mean ± S.D.
MDS	29	28.2 ± 4.7	49.6 ± 11.2
Control mothers	32	28.5 ± 5.2	47.3 ± 6.9

ISSN: 1755-8794