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

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