File talk:Migraine gender age.png

What are the units of the Y axis? Is it percent? The graph should say this.

The Y axis is "Incidence per 1000 person years"—I'm not sure quite what that means! I plan on redoing the graph in SVG; when I do, I'll fix the legend. MeekMark (talk) 23:11, 26 April 2010 (UTC)[reply]

It means the amount of incident per 1000 persons per year. Hence you have 5 patients with 1 attack/yr or a 1 patient with 5 attacks/yr for the same value.95.105.180.253 (talk) 16:46, 3 June 2011 (UTC)[reply]