ALBANY (AP) - U.S. Sen. Charles Schumer is calling for passage of legislation to outlaw gender-based pay discrimination.

The New York Democrat says a recent study shows that unfairness even extends to nursing, where males are paid more than female counterparts.

The Journal of the American Medical Association study examined salary trends by gender from 1988 to 2008 from a national sample survey of registered nurses.

It shows males earning about $5,100 a year more on average, though females comprise most of the profession.