Science

The prevalence among those with doctoral level training is incredibly high--whether it be male or female, MDs, DVMs, DDS, JDs (attorneys), PhDs and others I may have overlooked. They don't get diagnosed until later in life when the coping skills they used when younger cease to be enough with the fatigue that comes with age and busy life. Those early coping mechanisms included the ability to get by on little sleep, semi/photographic memory that allowed for the ability to digest tons of pages of written material in school, the ability to hyperfocus when necessary albeit lots of distractions/multitasking otherwise, lots of caffeine/nicotine (in lieu of adderall or other amphetamine type ADD drugs), etc.

When they do get diagnosed in mid-life, a real lightbulb goes off, but as he said, more stress, but the patterns tend to stay the same.