Does preoperative abduction value affect functional outcome of combined muscle transfer and release procedures in obstetrical palsy patients with shoulder involvement?

Table 2 Radiographic classification of glenohumeral deformity (Waters and Peljovich).

Type I	Normal glenoid (<5° retroversion difference versus contralateral normal)
Type II	Minimal deformity (>5° retroversion difference)
Type III	Moderate deformity (posterior humeral head subluxation)
Type IV	Severe deformity (posterior humeral head subluxation with false glenoid)
Type V	Severe flattening of humeral head and glenoid +/- complete dislocation
Type VI	Infantile glenohumeral dislocation
Type VII	Proximal humeral growth arrest

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