Table 3.

Markwalder grading of cSDH severity, adapted from Markwalder, T.M., Steinsiepe, K.F., Rohner, M., Reichenbach, W. and Markwalder, H., 1981. The course of chronic subdural hematomas after burr-hole craniostomy and closed-system drainage. ​Journal of neurosurgery, ​55(3), pp.390-396.

Grade	Description
0	Neurologically normal
1	Alert and oriented; mild symptoms such as headache; absent or mild neurological deficit, such as reflex asymmetry
2	Drowsy or disoriented with variable neurological deficit, such as hemiparesis
3	Stuporous but responding appropriately to noxious stimuli; severe focal signs, such as hemiplegia
4	Patient comatose with absent motor responses to painful stimuli; decerebrate or decorticate posturing.