That means that there are no simple, across-the-board solutions for addressing health disparities. Instead, solutions must be sensitive to the different patterns of health risk that emerge across population groups as adolescents enter young adulthood.

Our study is the first one of its kind because we followed the same people over time, looking at changes in their behavior.

This is not a story where minorities are always worse off. It really depends on what behavior you are looking at.

It's stunning. We looked at 20 areas, and 16 out of the 20 showed declines in health indicators.

Maybe this is a transitional period with no impact. Maybe these young people get married, cut back drinking, quit smoking and their diet improves. I can't wait to find out.

What's surprising is to see the decline in health across such a large array of outcomes.

Diet got worse, people got less exercise, had less access to health care, there was a lower health insurance rate. Young adults drink more, smoke more cigarettes, use drugs.

The disparities vary so much. It isn't one race or ethnic group that's always worse off.