Migraine Disability Assessment Test

The Migraine Disability Assessment Test (MIDAS) is a test used by doctors to determine how severely migraines affect a patient's life. Patients are asked questions about the frequency and duration of their headaches, as well as how often these headaches limited their ability to participate in activities at work, at school, or at home.
The test was evaluated by the professional journal "Neurology" in 2001; it was found to be both reliable and valid.
Questions.
The MIDAS contains the following questions:
The patient's score consists of the total of these five questions. Additionally, there is a section for patients to share with their doctors:
What your Physician will need to know about your headache:
A. On how many days in the last 3 months did you have a headache?
(If a headache lasted more than 1 day, count each day.) 
B. On a scale of 0 - 10, on average how painful were these headaches? 
(where 0 = no pain at all and 10 = pain as bad as it can be.) 
Scoring.
Once scored, the test gives the patient an idea of how debilitating his/her migraines are based on this scale:
0 to 5, MIDAS Grade I, Little or no disability 
6 to 10, MIDAS Grade II, Mild disability
11 to 20, MIDAS Grade III, Moderate disability
21+, MIDAS Grade IV, Severe disability