I came across a study that reports:
We surveyed an entire class of high-functioning young adults at an elite university for prospective major, familial incidence of neuropsychiatric disorders, and demographic and attitudinal questions. Students aspiring to technical majors (science/mathematics/engineering) were more likely than other students to report a sibling with an autism spectrum disorder (p=0.037). Conversely, students interested in the humanities were more likely to report a family member with major depressive disorder (p=8.8×10−4), bipolar disorder (p=0.027), or substance abuse problems (p=1.9×10−6).
Since my older daughter majored in engineering and the younger in humanities, that must mean that our family has a good chance of developing a fairly good set of neuropsychiatric disorders, no?

