Comparison between Manual and Computer-Assisted Measurements of Hallux Valgus Parameters

Abstract

Background:

The aim of this study was to determine if there are intraobserver and interobserver differences in reliability when measuring hallux valgus angles (HVA), 1–2 intermetatarsal angles (IMA), and distal metatarsal articular angles (DMAA) manually compared to computerassisted means. Our hypothesis was that the measurements taken by computer-assisted methods of these three forefoot angles would be superior in consistency and accuracy compared to manual measurements.

Methods:

Four examiners studied 20 weightbearing anteroposterior radiographs of patients with hallux valgus. Manual measurements were taken on photographic prints using a goniometer and a fine point pen. Computer-assisted measurements were taken on digitized images using computer software. Three sets of measurements by both of these methods were taken 1 week apart.

Results:

There was no statistically significant difference between digital and manual measurements for any of the three angles measured (p.05). However, the reliability of measurements within a range of 5 degrees for both methods was 70.6% for HVA, 84% for 1–2 IMA, and 59% for DMAA.

Conclusion:

There were no significant differences in interobserver and intraobserver reliability in measuring 1–2 IMA and HVA, regardless of the method of measurement; however, there was a significant difference in interobserver reliability when measuring the DMAA either on computer or manually (p = < .05).

Keywords

Hallux Valgus Intermetatarsal 1–2 angle Distal Metatarsal Articular Angle Computer Measurement Manual Measurement Reliability

Get full access to this article

View all access options for this article.

References

Coughlin

Freund

: The reliability of angular measurements in hallux valgus deformities. Foot Ankle Int. 22:369–279, 2001.

Saltzman

Brandser

Berbaum

: Reliability of standard foot radiographic measurements. Foot Ankle Int. 15:661–665, 1994.

Shea

Stevens

Nelson

: A comparison of manual versus computer-assisted radiographic measurement: Intraobserver measurement variability for Cobb angles. Spine 23:551–555, 1998.

Smith

Reynolds

Stewart

: Hallux valgus assessment: report of Research Committee of American Orthopaedic Foot and Ankle Society. Foot Ankle Int. 5:92–103, 1984.

Resch

Ryd

Stenstorm

Johnson

Reynisson

: Measuring hallux valgus: a comparison of conventional radiography and clinical parameters with regard to measurement accuracy. Foot Ankle Int. 16:267–270, 1995.