Diagnostic Imaging

Defining Ulnar Variance in the Adolescent Wrist: Measurement Technique and Interobserver Reliability

Goldfarb CA, Strauss NL, Wall LB, et al (Washington Univ School of Medicine, St Louis, MO) J Hand Surg 36A:272-277, 2011^§

Abstract

Purpose

The measurement technique for ulnar variance in the adolescent population has not been well established. The purpose of this study was to assess the reliability of a standard ulnar variance assessment in the adolescent population.

Methods

Four orthopedic surgeons measured 138 adolescent wrist radiographs for ulnar variance using a standard technique. There were 62 male and 76 female radiographs obtained in a standardized fashion for subjects aged 12 to 18   years. Skeletal age was used for analysis. We determined mean variance and assessed for differences related to age and gender. We also determined the interrater reliability.

Results

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