While comedians have long been rumored to struggle with manic depression or other disorders - at a comedy club in Los Angeles, comedians meet with psychologists at an in-house therapy program - it's difficult to document.
NEWS: Is Suicide a More Present Threat Than Murder?
In the British Journal of Psychiatry study, though, the researchers noted that comedians scored significantly higher for psychotic traits than the general population.
While reasons for connections between occupation and suicide are speculative, suicide researcher Steven Stack of Wayne State University's statistics show that suicides make up 3 percent of deaths of artists and performers, including comedians (suicides account for 1.5 percent of all deaths in the U.S.).
Williams, who was 63 years old, was found dead in his Northern California home on Monday morning. The impact of his passing extended far beyond the entertainment industry, even prompting the White House to make a statement. "Robin Williams was an airman, a doctor, a genie, a nanny, a president, a professor, a bangarang Peter Pan, and everything in between," said President Barack Obama. "But he was one of a kind. He arrived in our lives as an alien - but he ended up touching every element of the human spirit. He made us laugh. He made us cry. He gave his immeasurable talent freely and generously to those who needed it most - from our troops stationed abroad to the marginalized on our own streets."