Table 1

Prevalence of complaints during follow up represented in percentages of patients with complaints for the total study population

Complaint	1 month	3 months	6 months	1 year
Headache	37	26	19	32^1-150
Dizziness	59^1-150	42^1-150	33^1-150	25
Balance disorders	29	16	13	14
‘Tinnitus’	29	21	17	20
Hearing loss	18	10	14	12
Drowsiness	55^1-150	58^1-150	48^1-150	42^1-150
Fatigue	57^1-150	61^1-150	45^1-150	45^1-150
Forgetfulness	53^1-150	44^1-150	38^1-150	42^1-150
Poor concentration	51^1-150	44^1-150	44^1-150	42^1-150
Slowness	39	29	25	25
Irritability	35	27	26^1-150	34^1-150
Noise intolerance	53^1-150	40^1-150	25	28
Alcohol intolerance	6	11	17	20
Anxiety	20	19	19	26
Dry mouth	17	15	6	9
Neck pain	27	21	14	22
Neck stiffness	14	7	3	9
Arm pain	22	24	16	17
Itching	18	23	16	9
No complaints	4	18	11	14
Complaints	96	82	89	86
Range	0-15	0-17	0-16	0-16
Number (mean)	6.3	5.4	4.4	4.7
Severity (mean)	8.0	7.0	5.5	5.7