7 point coma scale

Alert	no signs of CNS depression
Drowsy	all patients between alert & stuporous
Stuporous	responds to verbal or tactile stimuli
Coma 1	responds to painful stimuli only, normal BP & Respiration
Coma 2	no response to painful stimuli, normal BP & Respiration
Coma 3	no response to painful stimuli, abnormal respiratory pattern &/or low but adequate BP
Coma 4	no response to painful stimuli, apnoea or inadequate respiration &/or inadequate BP

REFERENCE

Plum F, Posner JB. The diagnosis of stupor and coma.Contemp Neurol Ser 1972;10:1-286