Fig. 3

Calibration curves of prediction scales. NEWS: the National Early Warning Score. NEWSa: the National Early Warning Score adjusted for height above sea level, IEWS: the International Early Warning Score, IEWSa: the International Early Warning Score adjusted for height above sea level IEWSL: the International Early Warning Score plus the value of arterial lactate, IEWSaL: the International Early Warning Score adjusted for height above sea level plus the value of arterial lactate