O NHS Choices analisa as notícias e diz que pode não ter a ver com o sentido de vida propriamente, ou seja a notícia é algo enganosa:
http://www.nhs.uk/news/2017/07July/Pages/Does-having-a-sense-of-purpose-in-life-help-you-sleep-better.aspx
Citando:
""Sense of purpose aids sleep, US scientists find," The Guardian reports on a new study that explored the relationship between having a sense of purpose in life and quality of sleep in older adults.
The study analysed data from 800 older adults with an average age of 80 in the US.
Researchers found that generally, having a greater sense of purpose in life was associated with better quality of sleep, as well as a decreased likelihood of sleep disorders such as sleep apnoea and restless leg syndrome. "
