Table 2.

Migraine history.

Subject	Migraine history (years)	Attack frequency (n/month)	Time since last migraine attack (days)
1	8	2	17
2	7	2	12
3	21	3	11
4	25	1	22
5	15	2	15
6	20	1	31
7	19	1	19
8	8	0.5	50
9	17	2	15
10	7	1	29
11	6	3	10
12	2	2	7
13	36	4	4
14	16	3	5
15	10	2	13
Median (range)	15 (2–36)	2 (0.5–4)	15 (4–50)