Improving sleep quality may lead to mental and physical health improvements "comparable to a moderate lottery win."

The study included around 30,500 people and those individuals that reported improved sleep quality over an 8 week period had a 2 point increase in a survey used to monitor psychological well-being in patients. This same increase in well-being was found after somebody has won a jackpot of around £200,000. While this study does not establish causality, many other studies have found that sleep is very important for mental and physical wellbeing.