Table 1.

Swiss clinical staging of hypothermia

	Brown et al., 2012 (2)	Durrer et al., 2003 (1)	Typical core temperature (°C)
Stage 1	Conscious, shivering	Clear consciousness with shivering	35 to 32
Stage 2	Impaired consciousness, not shivering	Impaired consciousness without shivering	< 32 to 28
Stage 3	Unconscious, not shivering, vital signs present	Unconsciousness	< 28 to 24
Stage 4	No vital signs	Apparent death	< 24

There are minor differences between the original system developed by Durrer et al. [1] and the most recent versions [2]. Each clinical stage is associated with an estimate of core body temperature