Table 4 Frequency and duration of clusters and onset of attacks
From: Clinical profile of cluster headaches in China – a clinic-based study
Total (N = 120) | Males (n = 105) | Females (n = 15) | |
|---|---|---|---|
Frequency of clusters | |||
More than 2 times/yr | 9 (7.5) | 7 (6.7) | 2 (13.3) |
1-2 times/yr | 43 (35.8) | 36 (34.3) | 7 (46.7) |
Less than 1 time/yr | 46 (38.3) | 42 (40.0) | 4 (26.7) |
First experience of cluster | 14 (11.7) | 13 (12.4) | 1 (6.7) |
Irregular | 8 (6.7) | 7 (6.7) | 1 (6.7) |
Duration of clusters | |||
Less than 2 weeks | 17 (14.2) | 14 (13.3) | 3 (20.0) |
From 2 weeks to less than 1 month | 34 (28.3) | 27 (25.7) | 7 (46.7) |
From 1 to 2 months | 39 (32.5) | 36 (34.3) | 3 (20.0) |
More than 2 months | 8 (6.7) | 8 (7.6) | 0 |
First experience of cluster | 14 (11.7) | 13 (12.4) | 1 (6.7) |
Irregular | 8 (6.7) | 7 (6.7) | 1 (6.7) |
Frequency of onset of attacks | |||
More than 2 times/day | 16 (13.3) | 12 (11.4) | 4 (26.7) |
1 to 2 times/day | 88 (73.3) | 81 (77.1) | 7 (46.7) |
Less than 1 time/day | 16 (13.3) | 12 (11.4) | 4 (26.7) |
Duration of onset of attacks | |||
Less than 1 h | 21 (17.5) | 18 (17.1) | 3 (20.0) |
From 1 h to less than 2 h | 47 (39.2) | 42 (40.0) | 5 (33.3) |
From 2 h to 3 h | 41 (34.2) | 36 (34.3) | 5 (33.3) |
More than 3 h | 11 (9.2) | 9 (8.6) | 2 (13.3) |