A chiropractic multicenter observational pilot study to compile statistics on the examination procedures, diagnosis, types of treatments rendered, results of treatment, number of days of care, and number of treatments required to arrive at a 50% and a maximum clinical improvement was collected on 576 patients with low back and/or leg pain. The purpose was to determine the congenital and developmental changes in patients with low back and/or leg pain, the combinations of such anomalies, the accuracy of orthodox diagnostic tests in assessing low back pain, ergonomic factors affecting onset and, ultimately, the specific difficulty factors encountered in treating the various conditions seen in the average chiropractor's office. For all conditions treated, the average number of days to attain maximum improvement was 43 and the number of visits 19. It was concluded that this study provided useful data for assessment of routine chiropractic office based diagnosis and treatment of related conditions; however, further controlled studies are necessary for validation of specific parameters.