Table 2.
Characterization of the sample according to the diagnostic criteria for TTHs of the ICHD-3.
| Criterion A (Presence of the Headache) |
Criterion B (Presence of the Causative Disorder) |
Criterion C * (Evidence of Causation) |
Criterion D (Other Symptoms during Headache) |
TTH Classification | |
|---|---|---|---|---|---|
| Individual A | At least 10 headache episodes occurring on 1 to 14 days on average for more than 3 months | The headache lasts from 30 min to 72 h | It has 3 of the 4 characteristics of criterion C | No associated | 2.2. Frequent episodic TTH |
| Individual B | At least 10 headache episodes occurring on 1 to 14 days on average for more than 3 months | The headache lasts from 30 min to 72 h | It has 4 of the 4 characteristics of criterion C | Photophobia and phonophobia ** | 2.4.2 Probable frequent episodic TTH |
| Individual C | At least 10 headache episodes occurring on 1 to 14 days on average for more than 3 months | The headache lasts less than 30 min ** | It has 4 of the 4 characteristics of criterion C | No associated | 2.4.2 Probable frequent episodic TTH |
| Individual D | At least 10 episodes of headaches occurring on <1 day per month on average | The headache lasts less than 30 min ** | It has 3 of the 4 characteristics of criterion C | No associated | 2.4.1 Probable infrequent episodic TTH |
| Individual E | At least 10 episodes of headaches occurring on <1 day per month on average | The headache lasts from 30 min to 72 h | It has 3 of the 4 characteristics of criterion C | No associated | 2.1 Infrequent episodic TTH |
| Individual F | At least 10 headache episodes occurring on 1 to 14 days on average for more than 3 months | The headache lasts less than 30 min ** | It has 4 of the 4 characteristics of criterion C | No associated | 2.4.2 Probable frequent episodic TTH |
| Individual G | At least 10 headache episodes occurring on 1 to 14 days on average for more than 3 months | The headache lasts from 30 min to 72 h | It has 4 of the 4 characteristics of criterion C | Photophobia | 2.2. Frequent episodic TTH |
| Individual H | At least 10 headache episodes occurring on 1 to 14 days on average for more than 3 months | The headache lasts from 30 min to 72 h | It has 3 of the 4 characteristics of criterion C | No associated | 2.2. Frequent episodic TTH |
| Individual I | At least 10 episodes of headaches occurring on <1 day per month on average | The headache lasts from 30 min to 72 h | It has 3 of the 4 characteristics of criterion C | No associated | 2.1 Infrequent episodic TTH |
| Individual J | At least 10 headache episodes occurring on 1 to 14 days on average for more than 3 months | The headache lasts from 30 min to 72 h | It has 3 of the 4 characteristics of criterion C | No associated | 2.2. Frequent episodic TTH |
* Criterion C refers to ICHD-3 criterion. ** These criteria do not match the diagnostic criteria for TTH, and individuals with these then have a diagnosis of probable TTH.