Efficacy of transcutaneous electrical nerve stimulation and percutaneous neuromodulation therapy in chronic low back pain

The study was designed to compare the efficacy of two different modalities of transcutaneous electrical nerve stimulation (conventional and low-frequency TENS) (C-TENS and Low-TENS) and percutaneous neuromodulation therapy (PNT) in the treatment of chronic low back pain. Sixty patients with chronic low back pain were randomly divided into four groups as placebo-TENS, C-TENS, Low-TENS, and PNT. Therapeutic modalities were administered for 2 weeks. The pre-treatment and post-treatment assessments were done by using the Visual Analog Scale for pain; Low Back Pain Outcome Scale and Oswestry Disability Index for functional disability; and Health Status Survey Short Form (SF-36) for quality of life. In placebo-TENS group only emotional role limitation score of SF-36 significantly decreased after the treatment. All measurements except emotional role limitation score of SF-36 significantly improved in C-TENS group after the treatment. In both of Low-TENS and PNT groups, all parameters were significantly improved by the treatment. TENS modalities and PNT were significantly more effective than the placebo-TENS. No significant difference was found between C-TENS and Low-TENS. PNT was significantly more effective than TENS in providing relief of activity pain and in improving general health, vitality and emotional role limitation scores of health quality.