I found an Ontario Law Report clarifying use of AMA 5 Chapter 14 there. As you know I disparage the AMA Guides from the 3rd to the 6th edition. In this case, the plaintiff claimed ‘Catastrophic Injury’ on the basis that she had an Adjustment Disorder with Depressed Mood, Specific Phobia, and Pain Disorder with both Psychological Factors and a General Medical Condition. The health practitioners who assessed Ms. Pastore concluded that she had a class 4 (marked) impairment in the activities of daily living category- Marked impairment ‘significantly impeding useful functioning’. Leaving aside that this is a measure of disability, nevertheless one score of 4 or above is sufficient to reach this threshold. Maybe the AMA Guides are not useless after all.