LOS ANGELES - A former writer for David Letterman said she quit his NBC talk show in part because of alleged sexual favouritism and a hostile work environment.

Nell Scovell, writing for Vanity Fair online Tuesday, said she had no intention of filing a lawsuit and wasn't seeking revenge.

"I wanted to shine a light on gender inequality in that particular workplace," Scovell, who went on to a successful Hollywood career, said in a telephone interview.

In the Vanity Fair article, Scovell said Letterman didn't "hit on her" during her roughly five-month stint with NBC's "Late Night with David Letterman" in 1990.

"Did he pay me enough extra attention that it was noted by another writer? Yes. Was I aware of rumours that Dave was having sexual relationships with female staffers? Yes," Scovell wrote.