Shortwave Diathermy and Pilates Exercises in Patients With Chronic Non-specific Low Back

Scale with 11 centimeters is used for evaluate pain intensity, being "0" no pain and "10" the worst possible pain

It is organized in four categories: sensory, affective, evaluative and mixed, with 20 subcategories and 78 words descriptors of pain, describing the quality of pain. The pain evaluation index is the sum of the values added, and each word chosen in each dimension is the maximum score of each category: Sensory = 34, Affective = 17, Evaluative = 5, Mixed = 11, Total = 67.

The Rolland and Morris Questionnaire, validated in Brazil, will quantify the functional limitations caused by low back pain. The questionnaire is composed of 24 questions related to normal activities of daily living, in which each affirmative answer corresponds to a point. The final score is determined by the sum of the values obtained. Values close to zero represent the best results (lower limitation), and values close to 24 the worst results. Values above 14 points are considered as a severe spinal impairment.

The Short-Form Health Survey questionnaire (SF-36) will assess the health-related quality of life of patients. This instrument contains 36 questions grouped into eight areas: functional capacity (10 items), physical aspects (2 items), pain (2 items), general state of health (5 items), vitality (4 items), social aspects (2 items), emotional (3 items) and mental health (5 items). The values in each domain vary from 0 to 100 and, more indicate a better quality of life.

Evaluates the level of perception of patient recovery through a Scale Numbers of 11 points comparing the onset of symptoms at the beginning of treatment in relation to the last days. It varies from -5 to +5, being -5: extremely worse; zero: no modification; and +5: fully recovered, with the highest score representing greater recovery.

It will be evaluated by the Brazilian version of the Visual Analog Scale for anxiety. Analogic visual scale for anxiety is a horizontal line of 100 mm in length. The tip left without anxiety and the right tip means worse anxiety.

It will be evaluated by the Brazilian version of the Beck Depression Inventory, a self-assessment measure of depression. It is a questionnaire with 21 items whose intensity ranges from 0 to 3 points. Largest scores indicate more depressive symptoms.

The record of the symptoms and adverse events that occurred during the established behavior will be captured passively through spontaneous reports of the patient. The active catch will use a questionnaire with a record of the duration and intensity of the adverse symptom reported by the patient. You will then be asked to the patient graduates the certainty of their affirmations according to a Likert scale (being 1 not certain and 5 total certainty).

The MedRisk scale consists of 20 items, 10 items related to the therapist-patient interaction; 8 items involving evaluation of the infrastructure and work organization of the physical therapy clinic and 2 items that are considered as global evaluation of the treatment. The patient elects level of satisfaction in each item by selecting a Likert scale ranging from 1 "completely disagree" to 5 "agree completely" or through an option "not applicable", with high scores representing high satisfaction.