Symptoms	Gulf (n=3284)	Bosnia (n=1815)	Era (n=2408)
Feeling unrefreshed after sleep	56.1	33.0	31.6
Irritability/outbursts of anger	55.2	33.6	25.8
Headaches	53.5	36.0	35.6
Fatigue	50.7	26.3	27.7
Sleeping difficulties	48.0	30.7	28.4
Forgetfulness	44.9	19.9	17.1
Joint stiffness	40.0	21.8	23.5
Loss of concentration	39.7	17.2	15.1
Flatulence/burping	34.1	16.4	21.5
Pain without swelling/redness	32.2	13.8	14.4
Feeling distant/cut off from other	28.1	15.2	11.0
Avoiding doing things/situations	26.8	13.0	10.3
Chest pain	25.3	13.2	11.8
Feeling jumpy/easily startled	24.4	13.3	9.8
Sore throat	22.3	15.2	13.3