Document ID: chunk:federal_register_of_legislation:F2020C00214:clause:1_1:p1
Version: federal_register_of_legislation:F2020C00214
Segment Type: clause
Provision Reference: sch 1 cl 1 (pt 1/4)
Character Range: 9031–12390

1               Definitions
      In this instrument:
                                     being obese means having a Body Mass Index (BMI) of 30 or greater.
Note: BMI is also defined in the Schedule 1 - Dictionary.
                                     BMI means W/H2 where:
     W is the person's weight in kilograms; and
     H is the person's height in metres.
                                     chronic migraine means a neurological disorder meeting the following diagnostic criteria (derived from ICHD-3):
         1. Headache on greater than 14 days per month for greater than three months, and fulfilling criteria B and C.
         2. Occurring in a patient who has had at least five attacks of any combination of migraine without aura or migraine with aura.
         3. On greater than seven days per month for more than three months, fulfilling any of the following:
                1. criteria C and D for migraine without aura;
                2. criteria B and C for migraine with aura; or
                3. believed by the patient to be migraine at onset and relieved by a triptan or ergot derivative.
         4. Not better accounted for by another ICHD-3 diagnosis.

     Note: ICHD-3 is also defined in the Schedule 1 – Dictionary.
                                     clinical worsening of migraine means a change in the nature of the migraine resulting in one or more of the following:
         (a)          attacks of migraine that are increased in frequency by a factor of two-fold or more;
         (b)          attacks of migraine that are increased in severity with debilitating, long-lasting symptoms including nausea, vomiting, photophobia or phonophobia;
         (c)          a conversion from episodic to chronic migraine;
         (d)          an increase in the requirement for hospitalisation for management of the manifestations or complications of migraine; or
         (e)          an episode of severe migraine resulting in status migrainosus, cerebral infarct, seizure or death.
Note: chronic migraine is also defined in the Schedule 1 - Dictionary.
                                     ICHD-3 means the International Headache Society: International Classification of Headache Disorders, Third Edition.
                                     migraine—see subsection 7(2).

     migraine with aura means a neurological disorder meeting the following diagnostic criteria (derived from ICHD-3):
         1. At least two attacks fulfilling criteria B and C.
         2. One or more of the following fully reversible aura symptoms:
            1. visual;
            2. sensory;
            3. speech and/or language;
            4. motor;
            5. brainstem; or
            6. retinal.
        C.       At least three of the following six characteristics:
            1. at least one aura symptom spreads gradually over ≥5 minutes;
            2. two or more aura symptoms occur in succession;
            3. each individual aura symptom lasts between five and 60 minutes.  When three symptoms occur during an aura, the acceptable maximal duration is 3 x 60 minutes. Motor symptoms last up to 72 hours;
            4. at least one aura symptom is unilateral;
            5. at least one aura symptom is positive; or
            6. the aura is accompanied, or followed within 60 minutes, by headache.
        D.       Not