Efficacy of Education on Neurophysiology of Pain Combined to Hypnosis in Patients With Chronic Low Back Pain

Study Overview
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Brief Summary
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Although education on neurophysiology of pain improves disability, there are limited effects in pain intensity. Hypnosis is an approach that has proven useful in pain intensity and psychosocial aspects in some chronic pain conditions, but there is insufficient evidence of its contribution in patients with chronic non specific low back pain. The aim of the study is to assess the efficacy of combining education on neurophysiology of pain and hypnosis in patients with chronic non specific low back pain in pain and disability outcomes.

Detailed Description
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Introduction: Education on pain neurophysiology has beneficial effects on disability and psychosocial aspects in patients with non specific chronic low back pain. However, education has limited effects in pain. Hypnosis is an approach that has proven efficient in pain intensity and psychosocial aspects in some chronic pain conditions, but there is insufficient evidence of its contribution in patients with non specific chronic low back pain. Objectives: The aim of the study is to assess the efficacy of combining education on neurophysiology of pain and hypnosis in patients with non specific chronic low back pain in pain and disability outcomes. Study design: randomized controlled trial with two arms and blinded evaluator. Local study: Interventions will be held at the Universidade Cidade de Sao Paulo (UNICID). Participants: One hundred patients with chronic non specific low back pain who are on the waiting list for physical therapy care at UNICID physical therapy clinic, interested and eligible for the study will be invited to participate. Intervention: Patients will be randomized to the education group about pain neurophysiology or to a group that combines education with hypnosis. Measurements: Clinical outcomes will be obtained after 2 weeks and 3 months after randomization. The primary outcome will be pain intensity (measured by the numerical pain scale) and general disability (measured by the Roland-Morris questionnaire). The secondary outcome will be catastrophic thoughts (measured by PCS-Brazil), specific disability (measured by the Patient-specific function scale) and global perceived effect (measured by the Global Perceived Effect scale). Limitations: Both the therapist and the patients will not be blinded to the intervention provided. Hypothesis: This is the first study that will provided results achieved by education about pain neurophysiology using hypnosis in patients with chronic non specific low back pain.

Official Title
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Efficacy of Education on Neurophysiology of Pain Combined to Hypnosis in Patients With Chronic Low Back Pain

Conditions
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Chronic Low Back Pain

Intervention / Treatment
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* Other: education
* Other: education combined with hypnosis


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients with non specific chronic low back pain, defined as pain or discomfort between the coastal margins and lower gluteal folds, with or without symptoms related to lower limbs for at least three months, of both genders, aged between 18 and 80 years and literate in Portuguese. Exclusion Criteria: Patients with back pain by nerve root compromise, serious spinal pathologies (such as fracture, tumor, inflammatory and infectious diseases), cardio-respiratory and uncompensated metabolic diseases, previous back surgery , pregnancy, presence of some contraindications to exercise, and have a hearing or understanding problem that prevents the understanding of simple information.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Education<br>Patients will receive 4 sessions (1 hour each) of education on pain neurophysiology. | Other: education<br>* Patients will be educated about pain neurophysiology.<br>|
| Experimental: Education combined with hypnosis<br>Patients will receive 4 sessions (1 hour each) of education on pain neurophysiology combined with hypnosis. | Other: education combined with hypnosis<br>* Patients will be educated about pain neurophysiology combined with hypnosis.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pain Numerical Rating Scale | It is a translated and adapted scale for the Portuguese language that assesses pain intensity levels perceived by patients through a 11-point scale (ranging from 0 to 10), with 0 being classified as no pain and 10 worst pain possible . Patients will be asked to mark the level of the average pain intensity and the more intense based on the last seven days. | 2 weeks after randomization | 
| Roland Morris Disability Questionnaire | This questionnaire consists of 24 items describing everyday situations that patients may have difficulty in performing because of back pain. The greater the number of alternatives completed affirmatively, the greater the level of disability associated with lombar pain. Patients will be instructed to fill out the statements that actually describe their situation on the day of the interview. It's tool was already translated and adapted for the Portuguese language. | 2 weeks after randomization | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The Pain Catastrophizing Scale (PCS) | PCS is used to assess negative thoughts related to dor54. It is a self-administered questionnaire with 13 items and 3 subscales: impotence, magnification and rumination. A 5-point scale is used for each item. The score of each item is summed to define each subscale score or total score which may range from 0 to 52 points. It's tool was already translated and adapted for the Portuguese language. | 2 weeks and 3 months after randomization | 
| The Patient-Specific Functional Scale | We asked for the patient to identify up to 3 activities that are considered incapable of performing or presenting any difficulty. The measurement is made by Likert scale of 11 points for each activity, and the higher average score (ranging from 0 to 10 points) better is the patient's ability to make activity. It's tool was already translated and adapted for the Portuguese language. | 2 weeks and 3 months after randomization | 
| Global Perceived Effect Scale | It is a Likert scale of 11 points (ranging from -5 to +5) which compares the current state of the patient as the start of their symptoms. Positive scores are applied to patients who are better and negative scores apply to those who are worse off compared to the beginning of symptoms. The closer to the 5 means that the greater is the intensity perception. It's tool was already translated and adapted for the Portuguese language. | 2 weeks and 3 months after randomization | 
| Pain Numerical Rating Scale | It is a translated and adapted scale for the Portuguese language that assesses pain intensity levels perceived by patients through a 11-point scale (ranging from 0 to 10), with 0 being classified as no pain and 10 worst pain possible . Patients will be asked to mark the level of the average pain intensity and the more intense based on the last seven days. | 3 months after randomization | 
| Roland Morris Disability Questionnaire | This questionnaire consists of 24 items describing everyday situations that patients may have difficulty in performing because of back pain. The greater the number of alternatives completed affirmatively, the greater the level of disability associated with lombar pain. Patients will be instructed to fill out the statements that actually describe their situation on the day of the interview. It's tool was already translated and adapted for the Portuguese language. | 3 months after randomization | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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non specific chronic low back pain, education on pain neurophysiology, education on pain biology, education on pain neuroscience, hypnosis