Motor vehicle accidents (MVA) are a major cause of spinal injuries treated by chiropractors. In this study the files of one chiropractor were reviewed retrospectively to generate a data base on the MVA cases (n = 149). The effect of age, sex, vehicle damage, symptoms and concurrent physiotherapy on the dependent variables of number of treatments, improvement and requirement for ongoing treatment was computed using an analysis of variance. Overall the average number of treatments given was 14.2. Patients who complained of headache or low back pain required more treatments than average. Improvement level was lowered by delay in seeking treatment, the presence of uncomplicated nausea and advancing age. Ongoing treatment to relieve persistent pain was required in 40.2 percent of the cases. None of the factors studied had a significant effect on this variable. The results of this study are comparable to those reported in the medical literature.
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