Bad news night owls: People who go to bed later may be at higher risk of poor health - ABC News

People who describe themselves as an “evening person” may be at higher risk of poor health compared to morning types.
The new study followed over 430,000 adults in the United Kingdom between the ages 38 to 73 for six and a half years. At the end of this period, the researchers compared the mortality rates of the morning and evening types of people.