呢個研究追蹤咗大約一千位美國成年人 佢哋嘅年齡喺 34 歲到 93 歲之間 個研究開始時問佢哋 ： 「 喺過去嘅一年 ， 你經歷幾多壓力 ？ 」
The study, which followed about 1,000 United States adults between the ages of 34 and 93, began the study by asking, "How much stress have you experienced in the past year?"