A large Norwegian study found that workaholism often co-occurs with psychiatric disorders such as ADHD, OCD, and depression.
“The study showed that workaholics scored higher on all the psychiatric symptoms than non-workaholics. Among workaholics, the main findings were that:
32.7 per cent met ADHD criteria (12.7 per cent among non-workaholics).
25.6 per cent OCD criteria (8.7 per cent among non-workaholics).
33.8 per cent met anxiety criteria (119 per cent among non-workaholics).
8.9 per cent met depression criteria (2.6 per cent among non-workaholics).
“Thus, taking work to the extreme may be a sign of deeper psychological or emotional issues. Whether this reflects overlapping genetic vulnerabilities, disorders leading to workaholism or, conversely, workaholism causing such disorders, remain uncertain,” says Schou Andreassen.” https://www.sciencedaily.com/releases/2016/05/160525084547.htm