Getting less than five hours sleep a night raises older people's risk of premature death by a quarter, according to new research.
They are 40 percent more likely to develop at least two life-threatening illnesses such as heart disease, cancer and diabetes.
Lead author Dr Severine Sabia, of University College London, said: "Multimorbidity is on the rise in high income countries and more than half of older adults now have at least two chronic diseases.
