A descriptive study of the centralization phenomenon. A prospective analysis.

Area of Science:

• Spinal pain syndromes
• Physical therapy
• McKenzie system

Background:

• Centralization phenomenon is frequently reported in acute spinal syndromes, often predicting favorable treatment outcomes.
• Inconsistent definitions of centralization in literature hinder confirmation of its true prevalence and treatment response.
• This study addresses the need for reliable categorization and analysis of centralization in spinal pain management.

Purpose of the Study:

• To prospectively analyze the occurrence and treatment responses associated with the centralization phenomenon in acute neck and back pain.
• To document symptom changes during mechanical assessment and consecutive physical therapy visits.
• To hypothesize that centralization occurrence is lower than previously reported and that this group will show better treatment results.

Main Methods:

• Prospective analysis of 289 patients with acute neck or back pain undergoing outpatient physical therapy.
• Patients categorized into centralization, noncentralization, or partial reduction groups using the McKenzie system.
• Documentation of symptom changes, pain intensity, functional status, and treatment visits.

Main Results:

• Patients were reliably categorized based on movement signs and symptoms.
• The centralization group required significantly fewer treatment visits (P < 0.001) and showed better pain intensity and perceived function (P < 0.001) compared to the noncentralization group.
• Prevalence: 30.8% centralization, 23.2% noncentralization, 46% partial reduction.

Conclusions:

• Categorization by pain location changes aids in identifying patients with better outcomes and planning conservative treatment for acute spinal pain.
• Lack of proximal pain change by the seventh visit suggests further medical evaluation for potential physical or nonphysical factors.
• This approach facilitates effective management of acute spinal pain syndromes.