Activity level and severity of dysplasia predict age at bernese periacetabular osteotomy for symptomatic hip dysplasia

Travis Matheney, Ira Zaltz, Young Jo Kim, Perry Schoenecker, Michael Millis, David Podeszwa, David Zurakowski, Paul Beaulé, John Clohisy

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Background: The age when patients present for treatment of symptomatic developmental dysplasia of the hip with periacetabular osteotomy (PAO) varies widely. Modifiable factors influencing age at surgery include preexisting activity level and body mass index (BMI). The severity of the hip dysplasia has also been implicated as a factor influencing the age at arthritis onset. The purpose of this study was to determine whether activity level, BMI, and severity of dysplasia are independent predictors of age of presentation for PAO. Methods: A retrospective, institutional review board-approved review of prospectively collected data from a multicenter study group identified 708 PAOs performed for developmental dysplasia of the hip. Demographic factors that were considered in the analysis included age at surgery, BMI, history of hip disorder or treatment, and duration of symptoms. The severity of the developmental dysplasia of the hip was assessed by radiographic measurement of the lateral and anterior center-edge angles and acetabular inclination. Activity level was assessed with the University of California, Los Angeles (UCLA) activity score. Spearman correlations and t tests were used for univariable analysis. Multivariable regression analysis using generalized estimating equations was applied to determine independent predictors of age at PAO. Results: Univariable analysis indicated that age at presentation for treatment of PAO correlated with the lateral and anterior center-edge angles (p < 0.001), UCLA score (p < 0.001), and BMI (p = 0.04). Since the lateral and anterior centeredge angles were similarly correlated (Spearman rho = 0.61, p < 0.001), the lateral center-edge angle alone was used to classify the severity of the developmental dysplasia of the hip. Multivariable linear regression confirmed that a high UCLA score and severe hip dysplasia were independent predictors of age at PAO (p < 0.001). Conclusions: A high activity level and severe dysplasia lead to the development of symptoms and presentation for PAO at significantly younger ages. The combination of these two factors has an even greater effect on decreasing the age at presentation for hip-preserving surgery. An increased BMI was not independently associated with a younger age at surgery. Modifying activity level may be beneficial in terms of delaying the onset of symptoms from developmental dysplasia of the hip.

Original languageEnglish (US)
Pages (from-to)665-671
Number of pages7
JournalJournal of Bone and Joint Surgery - American Volume
Volume98
Issue number8
DOIs
StatePublished - Apr 20 2016

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Hip Dislocation
Osteotomy
Body Mass Index
Los Angeles
Hip
Research Ethics Committees
Age Factors
Age of Onset
Multicenter Studies
Arthritis
Linear Models
Therapeutics
Regression Analysis
Demography

ASJC Scopus subject areas

  • Surgery
  • Medicine(all)
  • Orthopedics and Sports Medicine

Cite this

Activity level and severity of dysplasia predict age at bernese periacetabular osteotomy for symptomatic hip dysplasia. / Matheney, Travis; Zaltz, Ira; Kim, Young Jo; Schoenecker, Perry; Millis, Michael; Podeszwa, David; Zurakowski, David; Beaulé, Paul; Clohisy, John.

In: Journal of Bone and Joint Surgery - American Volume, Vol. 98, No. 8, 20.04.2016, p. 665-671.

Research output: Contribution to journalArticle

Matheney, Travis ; Zaltz, Ira ; Kim, Young Jo ; Schoenecker, Perry ; Millis, Michael ; Podeszwa, David ; Zurakowski, David ; Beaulé, Paul ; Clohisy, John. / Activity level and severity of dysplasia predict age at bernese periacetabular osteotomy for symptomatic hip dysplasia. In: Journal of Bone and Joint Surgery - American Volume. 2016 ; Vol. 98, No. 8. pp. 665-671.
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abstract = "Background: The age when patients present for treatment of symptomatic developmental dysplasia of the hip with periacetabular osteotomy (PAO) varies widely. Modifiable factors influencing age at surgery include preexisting activity level and body mass index (BMI). The severity of the hip dysplasia has also been implicated as a factor influencing the age at arthritis onset. The purpose of this study was to determine whether activity level, BMI, and severity of dysplasia are independent predictors of age of presentation for PAO. Methods: A retrospective, institutional review board-approved review of prospectively collected data from a multicenter study group identified 708 PAOs performed for developmental dysplasia of the hip. Demographic factors that were considered in the analysis included age at surgery, BMI, history of hip disorder or treatment, and duration of symptoms. The severity of the developmental dysplasia of the hip was assessed by radiographic measurement of the lateral and anterior center-edge angles and acetabular inclination. Activity level was assessed with the University of California, Los Angeles (UCLA) activity score. Spearman correlations and t tests were used for univariable analysis. Multivariable regression analysis using generalized estimating equations was applied to determine independent predictors of age at PAO. Results: Univariable analysis indicated that age at presentation for treatment of PAO correlated with the lateral and anterior center-edge angles (p < 0.001), UCLA score (p < 0.001), and BMI (p = 0.04). Since the lateral and anterior centeredge angles were similarly correlated (Spearman rho = 0.61, p < 0.001), the lateral center-edge angle alone was used to classify the severity of the developmental dysplasia of the hip. Multivariable linear regression confirmed that a high UCLA score and severe hip dysplasia were independent predictors of age at PAO (p < 0.001). Conclusions: A high activity level and severe dysplasia lead to the development of symptoms and presentation for PAO at significantly younger ages. The combination of these two factors has an even greater effect on decreasing the age at presentation for hip-preserving surgery. An increased BMI was not independently associated with a younger age at surgery. Modifying activity level may be beneficial in terms of delaying the onset of symptoms from developmental dysplasia of the hip.",
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T1 - Activity level and severity of dysplasia predict age at bernese periacetabular osteotomy for symptomatic hip dysplasia

AU - Matheney, Travis

AU - Zaltz, Ira

AU - Kim, Young Jo

AU - Schoenecker, Perry

AU - Millis, Michael

AU - Podeszwa, David

AU - Zurakowski, David

AU - Beaulé, Paul

AU - Clohisy, John

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N2 - Background: The age when patients present for treatment of symptomatic developmental dysplasia of the hip with periacetabular osteotomy (PAO) varies widely. Modifiable factors influencing age at surgery include preexisting activity level and body mass index (BMI). The severity of the hip dysplasia has also been implicated as a factor influencing the age at arthritis onset. The purpose of this study was to determine whether activity level, BMI, and severity of dysplasia are independent predictors of age of presentation for PAO. Methods: A retrospective, institutional review board-approved review of prospectively collected data from a multicenter study group identified 708 PAOs performed for developmental dysplasia of the hip. Demographic factors that were considered in the analysis included age at surgery, BMI, history of hip disorder or treatment, and duration of symptoms. The severity of the developmental dysplasia of the hip was assessed by radiographic measurement of the lateral and anterior center-edge angles and acetabular inclination. Activity level was assessed with the University of California, Los Angeles (UCLA) activity score. Spearman correlations and t tests were used for univariable analysis. Multivariable regression analysis using generalized estimating equations was applied to determine independent predictors of age at PAO. Results: Univariable analysis indicated that age at presentation for treatment of PAO correlated with the lateral and anterior center-edge angles (p < 0.001), UCLA score (p < 0.001), and BMI (p = 0.04). Since the lateral and anterior centeredge angles were similarly correlated (Spearman rho = 0.61, p < 0.001), the lateral center-edge angle alone was used to classify the severity of the developmental dysplasia of the hip. Multivariable linear regression confirmed that a high UCLA score and severe hip dysplasia were independent predictors of age at PAO (p < 0.001). Conclusions: A high activity level and severe dysplasia lead to the development of symptoms and presentation for PAO at significantly younger ages. The combination of these two factors has an even greater effect on decreasing the age at presentation for hip-preserving surgery. An increased BMI was not independently associated with a younger age at surgery. Modifying activity level may be beneficial in terms of delaying the onset of symptoms from developmental dysplasia of the hip.

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