This study tracked about 1,000 adults in the United States, and they ranged in age from 34 to 93, and they started the study by asking, "How much stress have you experienced in the last year?"
Praćeno je oko 1 000  odraslih osoba u SAD-u, u rasponu od 34 do 93 godine, a započeli su pitanjem: "Koliko ste stresa doživjeli  u posljednjih godinu dana?"