Reliability of novice raters in using the movement system impairment approach to classify people with low back pain.

Observational cross sectional study. To examine the inter-rater reliability of novice raters in using the Movement System Impairment (MSI) approach system and to explore the patterns of disagreement in classification errors. The inter-rater reliability of individual tests items used in the MSI approach is moderate to good; however, the reliability of the classification algorithm has been tested only preliminarily.

Reliability of a treatment-based classification system for subgrouping people with low back pain.

Study Design: Observational, cross-sectional reliability study.

Objectives: To examine the interrater reliability of novice raters in their use of the treatment-based classification (TBC) system for low back pain and to explore the patterns of disagreement in classification errors.

Background: Although the interrater reliability of individual test items in the TBC system is moderate to good, some error persists in classification decision making.