title: Validity of a Back Pain Classification Scale among patients with low back pain not associated with demonstrable organic disease.
mesh_terms: D000328:Adult; D001416:Back Pain / Q000175:diagnosis / Q000523:psychology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D011581:Psychological Tests; D011602:Psychophysiologic Disorders / Q000175:diagnosis / Q000523:psychology*