Self reported health has declined since 1993 with a bigger gap between ethnicity, gender and income

NPR -Income inequality in the U.S. has grown over the past several decades. And as the gap between rich and poor yawns, so does the gap in their health, according to a study published in JAMA Network Open Friday.

What they found: Across all groups, Americans' self-reported health has declined since 1993. And race, gender and income play a bigger role in predicting health outcomes now than they did in 1993. Overall, white men in the highest income bracket were the healthiest group.

"And actually, what's happening to the health of wealthier people is that it's remaining relatively stagnant, but the health of the lowest income group is declining substantially over time," says Frederick Zimmerman, the study's lead author and a professor at the UCLA Fielding School of Public Health.