“…Laidlaw 16 suggested that between 75% and 90% of persons should regain their premorbid neurological function following surgery for chronic SDH, and that the mortality rate related directly to surgery should be less than 2%. However, it is difficult to directly compare series, due to differences in known prognostic factors 21,22 . In our series, patients with chronic SDH tended to be younger (median age 47 years and only 27% over 65 years), due largely to the younger population in the Northern Territory 23 , hence prognosis should be better.…”