Sorrell RG, et al. - The analgesic effectiveness of pulsed electromagnetic field (PEMF) therapy in subjects with persistent pain following lumbar surgery was investigated via performing a randomized, double-blind, sham-controlled, multicenter study in 36 subjects with persistent low-back and/or radiating leg pain after lumbar surgery. Compared to sham treatment, EMF therapy (42-μs pulse width) was associated with trends for a reduction in pain. Secondary endpoints, including the Oswestry Disability Index, Beck Depression Inventory-II, Patient Global Impression of Change, and consumption of analgesics, were consistent with an overall beneficial effect of the PEMF 42-μs pulse width device.