Table 2. Final results of second Delphi question (third round).

Ranking	Outcome measure	N	Mean item weight (SD)	Frequency-weight product*
1	take away the headache	121	3.36 (1.52)	407
2	prevent the attack from carrying through	100	2.55 (1.38)	255
3	make sure no other attack follows within a few hours or within a day	83	1.90 (0.96)	158
4	let me function properly again	83	1.64 (1.04)	136
5	clear my head	56	1.41 (0.11)	79
6	take away the pressing or thumping feeling	43	1.61 (0.19)	69
7	take away the nausea	49	1.35 (0.13)	66
8	take away the problems with vision (light flashes, hazy vision, double vision)	30	2.17 (0.25)	65
9	take away the sense of illness during a headache attack	41	1.41 (0.16)	58
10	take away the neck pain	35	1.57 (1.18)	55
11	take away the tiredness	44	1.00 (0.11)	44
12	take way the loss of function (problems with speech, tingling or loss of power in arms/legs)	23	1.70 (0.25)	39
13	take away the persistent headache after the headache attack	27	1.19 (0.16)	32

Items considered most important by the participants (N = 147).

* Weight frequency product: weight multiplied by the number of times it is mentioned.