PMID- 21696889 OWN - NLM STAT- MEDLINE DCOM- 20120625 LR - 20220409 IS - 1872-6623 (Electronic) IS - 0304-3959 (Linking) VI - 152 IP - 10 DP - 2011 Oct TI - Efficacy and safety of tanezumab in the treatment of chronic low back pain. PG - 2248-2258 LID - 10.1016/j.pain.2011.05.003 [doi] AB - Increased nerve growth factor levels are associated with chronic pain conditions, including chronic low back pain (LBP). This study examined safety and analgesic efficacy of tanezumab, a humanized anti-nerve growth factor antibody, in adults with chronic LBP. Patients received intravenous tanezumab 200 mug/kg plus oral placebo (n=88), intravenous placebo plus oral naproxen 500 mg twice a day (n=88), or intravenous placebo plus oral placebo (n=41). Primary outcome was average LBP intensity (aLBPI) at Week 6. Secondary outcomes were proportion of patients with >/=30% or >/=50% reduction in aLBPI, Roland-Morris Disability Questionnaire and Brief Pain Inventory-short form scores, Patients' Global Assessment of LBP, Patients' Global Evaluation of study medication, and rescue medication use. Mean aLBPI change from baseline to Week 6 was greater with tanezumab vs naproxen (P=0.004) and placebo (P<0.001). Greater proportions of patients reported >/=30% and >/=50% reduction in aLBPI with tanezumab vs naproxen (P