The Gallup Organization and Healthways, Inc., released the first data from the country's largest poll on health and happiness today, showing that almost half of all Americans characterize themselves as "struggling" on those fronts.

The Gallup-Healthways Well-Being Index polls 1,000 people a day nationwide, including Spanish speakers, cell phone users and other people normally left out of national opinion surveys. It's the largest ever survey of its kind, and Gallup has committed to doing it for the next 25 years. It began Jan. 1.

Almost 40% of those polled said they were significantly stressed the day before. Two-thirds said they had at least one of a list of chronic health problems, including high blood pressure or cholesterol. Almost a third, 28%, said they were not well-rested. A third said they worried about money the day before, 30% said they had a lot of worries in general and 23% said they were in physical pain.

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