Table 3.
Diagnostic criteria for hypnic headache (HH) and probable HH according to ICHD-2 and ICHD-3.
| Patients with onset of hypnic headache in childhood and references | |||||||
|---|---|---|---|---|---|---|---|
| A | B | C | D | E | F | G | |
| Grosberg et al. (16) | Scagni et al. (15) | Cerminara et al. (14) | Cerminara et al. (14) | Cerminara et al. (14) | Prakash et al. (18) | Bender (17) | |
| ICHD-2 for HH | - (C*) | - (C*) | - (C*) | + | - (C*) | + | + |
| ICHD-3 for HH | + | - (C**) | - (C**) | + | + | + | + |
| ICHD-3 for probable HH | + | + | + | + | + | + | + |
“+” indicates that the diagnostic criteria are met. “-” indicates that the diagnostic criteria are not met, with the unmet criterion specified in parentheses. *The two conditions of criterion C from ICHD-2, “occurs more than 15 times per month” and “first occurs after the age of 50 years,” are not satisfied. **The condition of criterion C from ICHD-3, “occurring on ≥10 days/month for >3 months,” is not satisfied.