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Topic:

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Issue:

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Category:

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Title:

Intraobserver and Interobserver Reliability of Pelvic Obliquity Measurement Methods in Patients With Idiopathic Scoliosis

Author:

Kisacik, Pinar PT, PhD; Bazancir-Apaydin, Zilan PT, PhD; Apaydin, Hakan MD

Journal:

Journal of Pediatric Orthopaedics

Date:

April 2024

Reference:

44(4):p 225-231, DOI: 10.1097/BPO.0000000000002624

Level Of Evidence:

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# of Patients:

85

Study Type:

Retrospective cohort study

Location:

Single institution

Summary:

This study evaluates and compares the intraobserver and interobserver reliability of four pelvic obliquity measurement methods (Osebold, O’Brien, Maloney, and Allen & Ferguson) in idiopathic scoliosis patients.

Methods:

Posteroanterior full-spine standing radiographs were analyzed for pelvic obliquity. Three raters measured pelvic obliquity using all four methods. Measurements were repeated after a month to determine intraobserver reliability. Curve characteristics such as magnitude, apical vertebral rotation, Risser grade, curve pattern, and femoral head height differences were recorded.

Exclusions:

Not specified

Results:

The Osebold method showed the highest interobserver reliability (ICC: 0.994 and 0.983) and intraobserver reliability (ICC: 0.909 to 0.997). The Allen & Ferguson method had the lowest reliability (Interobserver ICC: 0.911 and 0.934; Intraobserver ICC: 0.741 to 0.960). Observers preferred the Osebold method due to ease of use and time efficiency, while the Allen & Ferguson method was reported as the most time-consuming.

Conclusions:

All methods demonstrated excellent to good reliability. The Osebold method emerged as the most reliable and practical for measuring pelvic obliquity in idiopathic scoliosis patients, requiring only the iliac crests to be visible on radiographs.

Relevance:

Limitations:

Perspective:

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