The METRIC Study Protocol

NCT ID: NCT05986370

Last Updated: 2023-12-04

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

112 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-10-25

Study Completion Date

2026-12-31

Brief Summary

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The goal of this clinical trial is to test the effects of spinal manipulative therapy in individuals with chronic primary low back pain and determine the neurophysiological mechanisms underlying pain relief. The main questions it aims to answer are: • Is pain relief produced by spinal manipulative therapy in patients with chronic primary low back pain caused by a reduction of C-fiber-related nociceptive processing? • Are these effects greater when spinal manipulative therapy is applied to the whole spine where it is clinically indicated compared with lumbar spine only? • Are these effects greater after 36 treatments over 3 months compared with 12 treatments over 1 month. Participants will receive spinal manipulative therapy (all clinically indicated spine segments or back only) or a control intervention. A group of healthy volunteers will be recruited to assess secondary outcome measures over the same time period, as reference data for comparisons. Researchers will compare the two groups receiving spinal manipulative therapy to the group receiving the control intervention to see if clinical pain relief and the reduction of temporal summation of second pain (produced experimentally) is significantly greater with spinal manipulative therapy.

Detailed Description

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Conditions

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Chronic Low-back Pain

Keywords

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chronic primary low back pain spinal manipulative therapy nociplastic pain central sensitization C-fibers brain electroencephalography

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Investigators Outcome Assessors

Study Groups

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lumbar spinal manipulative therapy

Participants will receive spinal manipulative therapy (SMT) exclusively at dysfunctional lumbar segments. Participants will receive 36 SMT sessions over 12 weeks, 3 times per week, each session lasting ≈15 min. Spinal manipulation will be performed using the diversified technique. For each treatment, the SMT provider will perform two spinal manipulations, one on each side of the most painful lumbar vertebra. During spinal manipulations, participants will lay on their side and they will be instructed to inhale and exhale fully before each thrust.

Group Type EXPERIMENTAL

lumbar spinal manipulative therapy

Intervention Type PROCEDURE

Spinal manipulative therapy involves the application of spinal manipulation over several sessions. Spinal manipulation is defined as a high-velocity, low-amplitude thrust performed by a clinician to move a segment of the spine in a specific direction. This type of intervention often generates cavitation sounds (audible pops).

full spine spinal manipulative therapy

Participants will receive spinal manipulative therapy (SMT) at dysfunctional spinal segments in the lumbar AND other spine regions. Participants will receive 36 spinal manipulative therapy (SMT) sessions over 12 weeks, 3 times per week, each session lasting ≈15 min. Spinal manipulation will be performed using the diversified technique. For each treatment, the SMT provider will perform a minimum of two spinal manipulations, one on each side of the most painful lumbar vertebra. Spinal manipulation will also be delivered at other dysfunctional spinal segments, based on clinical examination. During spinal manipulations, participants will lay prone, supine or on their side and they will be instructed to inhale and exhale fully before each thrust.

Group Type EXPERIMENTAL

full spine spinal manipulative therapy

Intervention Type PROCEDURE

Spinal manipulative therapy involves the application of spinal manipulation over several sessions. Spinal manipulation is defined as a high-velocity, low-amplitude thrust performed by a clinician to move a segment of the spine in a specific direction. This type of intervention often generates cavitation sounds (audible pops).

sham spinal manipulative therapy

Participants will receive 36 sham SMT sessions (3x/week for 12 weeks, each session ≈15 min). This will target dysfunctional segments in the lumbar and other spine regions. Three maneuvers will be used:

* Ventral decubitus: 1 to 5 light and brief manual contacts (≈ 20 N and 5 s) will be applied and quickly released over the spinous process of dysfunctional vertebrae identified during clinical examination.
* Dorsal decubitus: sections of the treatment table will be slightly raised or lowered (≈ 5 cm) and their lower limbs' position changed once or twice e.g., knees bent, hips internally or externally rotated. Each position maintained during ≈ 30 s.
* Lateral decubitus: 1 to 5 impulses at the lowest setting of the Activator V instrument (Activator Methods Int. Ltd., Phoenix, Arizona, USA) will be applied on their gluteus and quadratus lumborum muscles. The position of the instrument will change after each impulse.

Group Type SHAM_COMPARATOR

sham spinal manipulative therapy

Intervention Type PROCEDURE

Sham spinal manipulative therapy (sham SMT), was designed to be structurally equivalent to SMT, i.e., to attend to the same body regions with the same amount of contact as well as to have the same number, frequency and length of sessions. SMT and sham SMT will be provided by the same treatment provider and will appear to be similarly tailored to the participants' condition. Sham SMT does not share the component of interest of SMT, i.e., the activation of deep high-threshold mechanoreceptors via high-velocity, low-amplitude thrusts applied to the spine. Yet, it shares all the other components not of interest in this study that may contribute to the placebo response, such as therapeutic alliance, contextual factors, physical touch, and expectations. Furthermore, deception will be used to balance expectations and enhance blinding.

no intervention

This fourth arm will comprise healthy volunteers (age/sex-matched to the participants in the test intervention - lumbar group) who will not receive any intervention. The main purpose of this fourth group is to provide reference values to interpret some results obtained in participants with chronic primary low back pain.

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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lumbar spinal manipulative therapy

Spinal manipulative therapy involves the application of spinal manipulation over several sessions. Spinal manipulation is defined as a high-velocity, low-amplitude thrust performed by a clinician to move a segment of the spine in a specific direction. This type of intervention often generates cavitation sounds (audible pops).

Intervention Type PROCEDURE

sham spinal manipulative therapy

Sham spinal manipulative therapy (sham SMT), was designed to be structurally equivalent to SMT, i.e., to attend to the same body regions with the same amount of contact as well as to have the same number, frequency and length of sessions. SMT and sham SMT will be provided by the same treatment provider and will appear to be similarly tailored to the participants' condition. Sham SMT does not share the component of interest of SMT, i.e., the activation of deep high-threshold mechanoreceptors via high-velocity, low-amplitude thrusts applied to the spine. Yet, it shares all the other components not of interest in this study that may contribute to the placebo response, such as therapeutic alliance, contextual factors, physical touch, and expectations. Furthermore, deception will be used to balance expectations and enhance blinding.

Intervention Type PROCEDURE

full spine spinal manipulative therapy

Spinal manipulative therapy involves the application of spinal manipulation over several sessions. Spinal manipulation is defined as a high-velocity, low-amplitude thrust performed by a clinician to move a segment of the spine in a specific direction. This type of intervention often generates cavitation sounds (audible pops).

Intervention Type PROCEDURE

Other Intervention Names

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spinal manipulation chiropractic adjustment grade 5 spinal mobilization control intervention sham control sham treatment placebo spinal manipulation chiropractic adjustment grade 5 spinal mobilization

Eligibility Criteria

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Inclusion Criteria

* Duration of current low back pain (LBP) episode ≥ 6 months;
* Average LBP intensity during the last 7 days ≥ 3/10;
* (For healthy volunteers only) To be of the same sex and age (± 1 year) as a participant with low back pain.

Exclusion Criteria

* Diagnosis of back conditions other than chronic primary LBP e.g., failed back surgery syndrome, spondylosis, spondylolisthesis, spinal stenosis, herniated disc, infection, etc.;
* Presence of pain in another body location that is more severe than the pain in the lower back;
* Presence of a neurological deficit i.e., sensation loss, muscle weakness, decreased deep tendon reflexes;
* Presence of contraindications to spinal manipulative therapy e.g., recent fracture, history of spinal surgery, cauda equina syndrome, inflammatory arthritis, taking anticoagulant medication, active cancer, moderate to severe osteoporosis, abdominal aortic aneurysm;
* Underwent surgery in the last 3 months;
* Pregnancy, ≤ 3 months post-partum or planning to get pregnant in the next 12 months;
* History of spinal manipulative therapy in the past 12 months;
* Scoliosis ≥ 20°;
* BMI ≥ 40;
* Insufficient language skills in French to complete the questionnaires;
* Open or pending litigation for LBP or seeking/receiving disability compensation;
* Diagnosis of an illness affecting the sensorimotor functions e.g., diabetes, multiple sclerosis, amyotrophic lateral sclerosis;
* Diagnosis of mental health disorders (with the exception of anxiety and depression);
* Current drug or alcohol dependence;
* Skin of type I on the Fitzpatrick scale;
* (For healthy volunteers only) Regular use of pain medication or usage in the 48 h prior to data collection;
* (For healthy volunteers only) History of chronic pain;
* (For healthy volunteers only) Acute pain on the days of data collection.
Minimum Eligible Age

18 Years

Maximum Eligible Age

60 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Université du Québec à Trois-Rivières

OTHER

Sponsor Role lead

Responsible Party

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Mathieu Piché

Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Mathieu Piché

Role: PRINCIPAL_INVESTIGATOR

Université du Québec à Trois-Rivières

Locations

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Université du Québec à Trois-Rivières

Trois-Rivières, Quebec, Canada

Site Status RECRUITING

Countries

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Canada

Central Contacts

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Benjamin Provencher

Role: CONTACT

Phone: 1-819-376-5011

Email: [email protected]

Mathieu Piché

Role: CONTACT

Phone: 1-819-376-5011

Email: [email protected]

Facility Contacts

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Benjamin Provencher, D.C., M.Sc.

Role: primary

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Provided Documents

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Document Type: Statistical Analysis Plan

View Document

Other Identifiers

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METRIC

Identifier Type: -

Identifier Source: org_study_id