All patient encounters collected in COAST and O-COAST were included in this analysis. The remaining diagnostic groupings had less than 350 diagnostic encounters included in each, an insufficient sample size to perform the analysis. Flexion distraction, chiropractic systems, acupuncture, and supportive devices were all used in less than 5% of diagnostic encounters. *BMI reference category is normal weight Full size imageDifferent provider variables were also associated with therapeutic intervention selection. However, the fewer diagnostic encounters available in each diagnostic grouping resulted in wider confidence intervals.