The gender pay gap among doctors, dentists and other health care workers has grown over the past decade, says Sarah Kliff over at the Wonkblog, citing new research in the Journal of the American Medical Association.

As you can see in the chart below, even adjusting for hours and years of experience, female doctors earn less than their male counterparts.

Kliff writes that differences in specialty might explain some of the gap, but the study’s three authors all agree that even without the specialty adjustment the space between male and female doctors’ salaries still merits examination.