The McKenzie classification system in the extremities: a reliability study using Mckenzie assessment forms and...

Area of Science:

• Physiotherapy
• Musculoskeletal Disorders
• Clinical Assessment

Background:

• The McKenzie Method is widely used for diagnosing and treating mechanical low back pain.
• Reliability in classifying patients using the McKenzie Method is crucial for consistent treatment outcomes.
• Previous studies have explored the reliability of the McKenzie Method, but specific focus on extremity assessment forms is needed.

Purpose of the Study:

• To assess the inter-rater reliability of experienced physiotherapists in classifying patients with McKenzie nonspecific mechanical syndromes.
• To evaluate the consistency of diagnoses made using McKenzie extremity assessment forms.

Main Methods:

• Twenty-five anonymized patient vignettes with extremity presentations were used.
• McKenzie Institute International Diploma holders worldwide were invited to classify the vignettes.
• A repeated mailing strategy was employed to maximize therapist response rates.

Main Results:

• A total of 97 therapists responded out of 126.
• The overall agreement among therapists for classification was 92%.
• A high kappa value of 0.83 indicated substantial agreement.

Conclusions:

• The McKenzie extremity assessment forms demonstrate good reliability among experienced physiotherapists.
• The findings support the consistent application of the McKenzie Method for extremity conditions.
• This reliability enhances confidence in using these forms for clinical decision-making.