title: Age and migration percentage as risk factors for progression in spastic hip disease.
abstract: Age and migration percentage were evaluated as risk factors for the progression of spastic hip subluxation in patients with cerebral palsy. Three age-groups were defined: group 1 (two to eight years), group 2 (nine to 18 years), and group 3 (over 18 years). Four subluxation groups were defined by migration percentage: group A (< 30 per cent), group B (30 to 60 per cent), group C (60 to 90 per cent), and group D (> 90 per cent). The risk of progression was the same in groups 1A and 2A, and both of these were higher than the risk in group 3A. All group B hips had similar risks for progression, and all group C hips progressed to group D (> 90 per cent migration percentage). Groups 1A, 1B, 2A, 2B and 3B hips need close radiographic follow-up to detect progressive subluxation. All group C hips required surgical treatment for progression to dislocation to be avoided.
authors.affiliation: Alfred I. du Pont Institute, Wilmington, DE 19899, USA.
authors.forename: F
authors.initials: F
authors.lastname: Miller
authors.forename: M R
authors.initials: MR
authors.lastname: Bagg
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002547:Cerebral Palsy / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D002648:Child; D002675:Child, Preschool; D018450:Disease Progression; D005500:Follow-Up Studies; D006616:Hip Contracture / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000517:prevention & control; D006617:Hip Dislocation / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000517:prevention & control; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D011859:Radiography; D012307:Risk Factors; D012720:Severity of Illness Index