 In 1995 a treatment based classification system for patients with acute low back pain was published.8 Patients were categorized into one of four categories: manipulation, directional exercises flexion, extension, lateral shift correction, immobilization, or traction. 8This classification system led to further validation of the categories and clinical prediction rules CPR related to best treatment outcomes.9-11 In 2005, Hicks built upon the initial classification system for immobilization when he published a preliminary CPR identifying which patients were most likely to benefit from lumbar stabilization.10 Hicks identified the following predictors for patient response to stabilization exercises: individuals younger than age forty, straight leg raise greater than ninety-one degrees, and aberrant motions or a positive prone instability test.10 Hicks reported a presence of three or more of these variables had a positive likelihood ratio of 4.0 for a 95 confidence interval.10 However, no studies to date have confirmed such results nor validated this clinical prediction rule. 