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?"
Śledzono w nim losy tysiąca Amerykanów w wieku od 34 do 93 lat. Zaczęto od pytania: "Ile stresu doświadczyłeś w zeszłym roku?