Table 2. Distribution of 10 common primary headache subtypes diagnosed at first-visit headache clinics by frequencies.
| ICHD-3β code | Classification of primary headache disorders | No. (%) |
|---|---|---|
| 1.1 | Migraine without aura | 400 (12.2) |
| 4.7 | Primary stabbing headache | 179 (11.0) |
| 2.4 | Probable tension-type | 147 (9.0) |
| 1.3 | Chronic migraine | 143 (9.0) |
| 2.2 | Frequent episodic tension-type headache | 128 (7.9) |
| 1.5 | Probable migraine | 112 (6.9) |
| 2.3 | Chronic tension-type headache | 98 (6.0) |
| 2.1 | Infrequent episodic tension-type headache | 72 (4.4) |
| 1.2 | Migraine with aura | 42 (2.6) |
| 4.10 | New daily persistent headache | 26 (1.6) |