Since the 1990s, there's been speculation about a connection between the two diseases. Depression affects around 280 million people globally, while CVD impacts approximately 620 million.
Researchers analyzed data from more than 20,000 international participants who wore a device that measures body temperature and also self-reported their body temperatures and depression symptoms daily.
Animal studies of metformin have suggested a possible link with reduced depression and anxiety, so this latest finding further suggests that additional research into metformin and depression may be warranted.
Historically, poor sleep has been seen as a side effect of mental ill health, but this study found that the link between sleep and mental illness is more complex
The research paper, published in The Lancet Public Health, is the first to find evidence of higher levels of depression and anxiety among higher education students compared with their peers.
The songwriter revealed, "Honestly, I've been sporadically writing songs for about six or seven years now," as she talked about her upcoming album 'Reasonable Woman'.