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Table 3 Constructed sets of classification criteria based on ICHD-3 for the headache classification system

From: mBrain: towards the continuous follow-up and headache classification of primary headache disorder patients

Disorder type Set Criteria
Migraine without aura Set (a) A: At least five attacks fulfilling criteria B–D
   E: Not better accounted for by another ICHD-3 diagnosis
  Set (b) C: Headache has at least two of the following four characteristics:
    (1) unilateral location
    (2) pulsating quality
    (3) moderate or severe pain intensity
    (4) aggravation by or causing avoidance of routine physical activity
   D: During headache at least one of the following:
    (1) nausea and/or vomiting
    (2) photophobia and phonophobia
  Set (c) B: Headache attacks lasting 4–72 h (when untreated or unsuccessfully treated)
Cluster headache Set (a) A: At least five attacks fulfilling criteria B–D
   D: Occurring with a frequency between one every other day and eight per day
   E: Not better accounted for by another ICHD-3 diagnosis
  Set (b) B (part): Unilateral orbital, supra-orbital and/or temporal pain
   C: Either or both of the following:
    (1) At least one of the following symptoms or signs, ipsilateral to the headache:
     (a) Conjunctival injection and/or lacrimation
     (b) Nasal congestion and/or rhinorrhoea
     (c) Eyelid oedema
     (d) Forehead and facial sweating
     (e) Miosis and/or ptosis
    (2) A sense of restlessness or agitation
  Set (c) B (part): Severe or very severe pain lasting 15–180 min (when untreated)
Episodic tension-type headache Set (a) A: At least 10 episodes of headache occurring on < 1 day/month on average (< 12 days/year) and fulfilling criteria B–D
   E: Not better accounted for by another ICHD-3 diagnosis
  Set (b) C: At least two of the following four characteristics:
    (1) Bilateral location
    (2) Pressing or tightening (non-pulsating) quality
    (3) Mild or moderate intensity
    (4) Not aggravated by routine physical activity
   D: Both of the following:
    (1) No nausea or vomiting
    (2) No more than one of photophobia or phonophobia
  Set (c) B: Lasting from 30 min to 7 days
  1. The table gives an overview of how the ICHD-3 criteria of migraine without aura (criteria 1.1), cluster headache (criteria 3.1) and episodic tension-type headache (criteria 2.1 for infrequent episodic tension-type headache), are split up in three sets for version 3 of the classification criteria for an individual headache attack: set (a) with criteria not targeted at individual attacks; set (b) with criteria targeted at individual attacks that are required to classify an attack as this type; and set (c) with criteria targeted at individual attacks that are not required to classify an attack as this type. The mentioned letters refer to the criteria letters as how they are presented in ICHD-3. Note that for version 1 of the classification criteria, both set (b) and set (c) are required for the classification of an individual attack as that type. For version 2, all criteria in set (b) and set (c) are required for classification, except for the treatment criteria (see Tables 4 and 5)