Chronic insomnia is linked to an increased risk of developing hypertension, Type 2 diabetes, heart attack, depression, anxiety and premature death.

How did you sleep last night? If you're over 65, I hope it was better than many others your age. In a study by the National Institute on Ageing of more than 9,000 Americans aged 65 and older, more than half said they had difficulty falling asleep or staying asleep. Many others who believe they spend an adequate number of hours asleep nonetheless complain of not feeling rested when they get up.

Chronic insomnia, which affects 5 per cent