Fig. 3From: Where to start? A two stage residual inclusion approach to estimating influence of the initial provider on health care utilization and costs for low back pain in the USAdjusted Health Care Costs: Total and Out of Pocket (OOP) Costs by First Provider Seen for Low Back Pain. PT = physical therapist; Chiro = chiropractor; Acu = acupuncturist; APRN = advanced practice registered nurse; PCP = primary care physician; PM&R = physical medicine and rehabilitation physician; Ortho = orthopedist; EM = emergency medicine physician. Other category results available by requestBack to article page