Long-term lack of sleep increases risk for suicide.
Researchers analyzed merged data from 471 people and found a significant increase in the risk of suicide among those who got less sleep. For each one hour increase in sleep duration there was a 72% decrease in the likelihood of moderate/high suicide risk. Apparently sleep mediates a synergy between insomnia, depression, and suicidal thoughts. (This data was presented at SLEEP 2013 and is awaiting publication.)
PositiveTip: Evidence continues to point to the value of adequate sleep. Are you getting enough?