 Low back pain Lower Back Pain is extremely common, affecting more than 80 of the general population in the modern world, one is considered the most common cause of disability in people under the age of 45. 2 Lower back pain represents a social problem and substantial economies in Western countries, such as also considered a first cause orthopedic advice ahead. 3 Over the past decades, developed a number of methods for assessing the functional status of patients with low back pain, 4-7 and over twenty-five generic methods available today for use in pain clinics, orthopedic clinics and in clinical trials. 8 A large part of the measures used to monitor the response of patients to treat low back pain based on self-report questionnaires on patients pain intensity, quality of life measures, and functional status.measures which relate to such measures - reduction of pain, reduction in the consumption of medication relieve pain, improved mood, improved daily function, improved sleep patterns, back in daily life and work, a reduction in the consumption of health system resources, and reduction in disability benefits, sick leave, early retirement, and more. The existence of multiple assessment tools of this type suggests that there is no a single tool valid and reliable for assessing the severity of low back pain and its response to treatment. In addition, there is a problematic depending on the patients self-report is subjective and often biased because of the possibility of secondary gain illness. 