The proportion of older acute care physicians (ACP), emergency, critical care & anesthesia, has been steadily increasing. Ageing is associated with physiological changes, which in turn can influence a physician's clinical abilities and decision-making. The litigation and physician disciplinary data suggests that incidents involving all physicians are likely to occur later in practice, with degree of injury identified in the claims being of greater severity. However research, investigating how age-related physiological changes affect clinical performance and patient safety, is lacking.