This Quick Reference Guide for Clinicians contains highlights from the Clinical Practice Guideline version of Acute Low Back Problems in Adults, which was developed by a private-sector panel of health care providers and consumers. The Quick Reference Guide is an example of how a clinician might implement the panel's findings and recommendations on the management of acute low back problems in working-age adults. Topics covered include the initial assessment of patients presenting with acute low back problems, identification of red flags that may indicate the presence of a serious underlying medical condition, initial management, special studies and diagnostic considerations, and further management considerations. Instructions for clinical testing for sciatic tension, recommendations for sitting and unassisted lifting, tests for identification of clinical pathology, and algorithms for patient management are included.