Our study shows that increasing carbohydrates as we did it, with an emphasis on vegetables and fruits and grains, in fact does not promote weight gain.

The take-home message is that lower-fat diets don't cause weight gain, and for weight maintenance this is a reasonable diet for people to follow. If we could just get people to maintain their weight, we'd be halfway there on this nation's obesity epidemic.

What we find is what the sensible books have been recommending. These were people who had a high-fat diet. We cut fat below 30 percent and they did not gain weight.

Maybe everybody got a snack but him, so he went over and took a girl's snack — that's normal toddler behavior, and he may need to work on verbal skills. Or, she skipped her nap, and that always leads to trouble.

In retrospect, we're not surprised at that. It's difficult to get huge numbers of diverse people to change their eating habits.

What people like us in the nutritional-sciences field try to get people to understand is, there are no quick fixes. Drastically reducing carbohydrates or eating grapefruits all day isn't going to work in the long run.

We cannot rule out some small residual influence of the surgery itself on cardiovascular events. But it looks as if women with hysterectomies have more heart disease because women who get hysterectomies also have more risk factors.

Increasing carbohydrates as we did it, with an emphasis on vegetables and fruits and grains, in fact, does not promote weight gain.

We realized that it also provided a wonderful opportunity to examine the impact of a low-fat eating pattern on weight.

It will help people to understand that the weight gain we're seeing in this country is not caused by the lower-fat diets.

They're more likely to complain to parents or insist the child leave if anything goes wrong, rather than trying to work it out.

We can do a lot more analysis on this data set to systematically investigate these nutrients and their effect on their endpoints.

We wanted to see if women who had hysterectomies differed in some way from those who did not, and whether the hysterectomy itself had an influence on heart disease.