For those with Brain Injuries the standard tool for evaluation is called a Glasgow Outcome Scale (GOS).
When it was originally created it was so broad as to be only marginally useful. It had (5) possibilities running from "Dead", "Vegetative", so on, up to "Good Recovery".
This scale originally let a medical professional sort out the brain injured victims in a crude triage fashion. It was useful because it was applied at time of injury, at 3 months, then at 6 months and again at 12 months.
This kind of healing time is important for the reader to note. It is realistic to expect recovery from depression to take some amount of time -- this is especially true when accompanied by physical injury.
However, the original Glascow Outlook Scale was criticized as being too broad and it was improved to become the GOS-Expanded by adding additional granularity. That phrase of "granularity" is also how I explain my Depression Symptoms Decoded
It is my opinion that the diagnosis of "depression" is too broad, and that much valuable