JOURNAL ARTICLE
META-ANALYSIS
SYSTEMATIC REVIEW
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Incidence of total hip arthroplasty in patients with Legg-Calve-Perthes disease after conservative or surgical treatment: a meta-analysis.

PURPOSE: This systematic review and meta-analysis aimed to determine the incidence of total hip arthroplasty (THA) in patients with Legg-Calve-Perthes disease (LCPD) treated conservatively or surgically and factors influencing the incidence of THA.

METHODS: Long-term follow-up studies on the conservative or surgical treatments of LCPD from 1950 to 2021 were conducted using six public databases. Articles were screened by two investigators (PRISMA guidelines), and the quality of the included publications (n = 27) was assessed (MINORS criteria). R version 4.2.1 was used for statistical analysis.

RESULTS: The overall incidences of THA were 6.8% and 5.14% in patients who were treated conservatively and surgically, respectively. At disease onset, the incidences of THA were 6.79% and 6.17% after conservative treatment and surgery in patients aged < seven years, respectively, and 16.97% and 3.61% in patients aged > seven years, respectively. The incidences of THA were 4.91%, 5.19%, and 23.18% in patients who were treated conservatively with ≤ 30, 30-40, and > 40 years of follow-up, respectively, and 3.68%, 3.11%, 9.66%, and 17.92% in patients who were treated surgically with ≤ ten, ten to 20, 20-40, and > 40 years of follow-up, respectively. In patients who received conservative treatment, the incidences of THA were 5.79% and 5.29% in patients with Stulberg I-II and III-V, respectively. In surgically treated patients, the incidence of THA was 0% in Stulberg I-II and 8% in Stulberg III-V.

CONCLUSION: Patients with LCPD had relatively low incidences of THA. The greater the age at disease onset and longer the follow-up, the higher the incidence of THA; however, the Stulberg classification was not directly associated with the incidence of THA.

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