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Table 3 GSA and subluxation measurements on both the affected and the normal shoulder.

From: An MRI study on the relations between muscle atrophy, shoulder function and glenohumeral deformity in shoulders of children with obstetric brachial plexus injury

  Affected side Normal side
  Mean Range Mean Range
GSA -28.3° ± 15.1°* -57° to -8° -3.7° ± 4.2° -12° to 2°
Subluxation 30.0% ± 17.5% * -7.4% to 51.9% 57.3% ± 7.4% 42.3% to 71.4%
  1. Values are given as mean ± SD with their range. * Difference between the normal and affected side was significant: p < 0.001.