“…3,19,65 PD has been identified as an important prognostic variable to identify patients with lumbar impairment who are at high risk for developing or sustaining chronic disability. 4,11,12,35,40,41,43 Failure to identify patients with lumbar impairment who experience elevated PD may be problematic, because evidence demonstrates an important association between elevated PD and poor treatment outcomes, increased healthcare utilization, and T T STUDY DESIGN: Prospective, longitudinal, observational cohort design.…”