Dan Diamond, Managing Editor

The gender gap in health care is well-documented. Male doctors get paid more than female doctors. Male researchers get more  medical literature published than female researchers.

But looking at salary data, I learned something new on "National Equal Pay Day" this week: Even in nursing, which is dominated by women—male nurses are outnumbered almost 10:1—men make more. The average salary per year in 2011 was nearly $61,000 for a male nurse, and just $51,100 for a female nurse.

Drawing on Census data, you can see how this broke out across different levels of nursing. (Update: See comment here.)