6 - Can't be ignored for any length of time, but you can still go to work and participate in social activities.
7 - Makes it difficult to concentrate, interferes with sleep. You can still function with effort.
8 - Physical activity severely limited. You can read and converse with effort. Nausea and dizziness set in as factors of pain.
9 - Unable to speak. Crying out or moaning uncontrollably - near delirium.
10 - Unconscious. Pain makes you pass out.