PRL and Increased circulating prolactin concentration: However, among women with moderate hyperprolactinaemia (levels above 1000 mlU/L, N = 9), those aged above 40 had higher PANSS positive scores than their younger counterparts (N = 12) (Mann–Whitney U = 26.5, p = 0.049 – mean ± s.d.: 15.1 ± 6.2 v. 10.2 ± 2.7), with comparable doses of prolactin-raising antipsychotics between the two age groups.