Jan Fawcett, MD
The older a person is, the less likely he/she is to develop this disorder. The more prevalent this occurs in relatives, the greater the chances one would be afflicted by this. Reasons one might become ill later in life would be a side effect of certain medications such as steroids. Once this is treated, the chances of a reoccurrence would be rare. Another reason for late life occurrence is extreme and possibly unrelenting stress. This is not contagious, but usually medication induced or innate.
The diagnosis is subject to mode. 30 yers ago everybody was labeled schzophreic and nw nearly everybody is labeled manic depressive.....
If you are not a physician, do not read medical books.