Prevalence of symptoms at follow-up*
Norris and Watt+, 1983 Radanov et al.+, 1991 Radanov et et.**, 1993 Hildingsson and Toolanen, 1990
n ( %) n ( %) n ( %) n ( %)
Symptomatic 21 (27) 41 (44)
Neck pain 40 (66) 27 (29)
Neck stiffness 23 (25)
Headache 26 (43) 32 (27) 14 (15)
Shoulder pain 18 (17)
Arm pain/numb. 23 (38) 8 ( 9)
Paresthesias 2 ( 3)
Weakness 8 (13)
Dysphagia 8 (13) 6 ( 6)
Visual 0 ( 0) 5 ( 5)
Auditory 4 ( 4)

* Time from MVC to follow-up:
Norris and Watt 73 $ 6 months, mean approximately 2 years
Radanov et al 82 ,85 6 months Hildingsson and Toolanen39 6-43 months, mean approximately 2 years
+ Secondary analysis
** Symptom of interest: headache only