As I was scanning the internet months ago, I came across alot of articles refering that RSD was more prominent in the white race , Then it stairstepped down in each remaining race's[which i dont remember],,but as mentioned above,,,woman were more at risk of getting RSD than men,,,another issue mentioned was people who had nervous conditions[bipolar,anxiety,A.D.D }were alot more at risk,, That did make sense,since stress and anxiety with me cause's flares,spread,and pain,,,,what a vicious cycle,,because for some of us,,you get pain or flares with pain, and that makes us worry and stress more,,it also makes sense why they tell us no choclate,caffeine,and anti-depressants... And I as well ;have read that its the middle aged{I read mid forties] were at a higher risk.........