Table 1.

Patient characteristics, 2 female and 1 male groups

		Total N = 20	Female 1 n = 7	Male n = 6	Female 2 n = 7
Pain score* (1-10)		8.4	8.2	8.4	8.6
Attack freq./month	2 - 5	16	6	5	5
	≥ 5	4	1	1	2
Age	< 25	4	2	-	2
	25 - 50	11	3	4	4
	> 50	5	2	2	1
	mean	43 yrs	42 yrs	47 yrs	39 yrs
Education level	low	3	-	1	2
	medium	14	5	5	4
	high	3	2	-	1
Paid work (hrs/wk)	none	5	2	1	2
	< 36	8	4	1	3
	≥ 36	7	1	4	2
	mean (hours/week)	22	15	29	21

* Pain level during maximum of attack on a 1-10 numeric scale (10 being unbearable pain)