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Risk of a complete exchange or failure in total knee arthroplasty and unicompartmental knee arthroplasty: a nationwide population-based cohort study from South Korea.
Han, Seung-Beom; Song, Si-Young; Shim, Jae-Hoon; Shin, Young-Soo.
Affiliation
  • Han SB; Department of Orthopedic Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea.
  • Song SY; Department of Orthopedic Surgery, Dongtan Sacred Heart Hospital, Hallym University School of Medicine, Hwaseong, Republic of Korea.
  • Shim JH; Department of Orthopedic Surgery, Chuncheon Sacred Heart Hospital, Hallym University School of Medicine, 77 Sakju-ro, Chuncheon-si, Gangwon-do, Chuncheon, 24253, Republic of Korea.
  • Shin YS; Department of Orthopedic Surgery, Chuncheon Sacred Heart Hospital, Hallym University School of Medicine, 77 Sakju-ro, Chuncheon-si, Gangwon-do, Chuncheon, 24253, Republic of Korea. sysoo3180@naver.com.
Arch Orthop Trauma Surg ; 141(3): 477-488, 2021 Mar.
Article in En | MEDLINE | ID: mdl-33184700
ABSTRACT

PURPOSE:

Few large-scale studies using adjusted data from national registries have explored the risk factors of subsequent revision in patients with unicompartmental knee arthroplasty (UKA) compared to those with total knee arthroplasty (TKA). We investigated the incidence rate and risk factors of subsequent revision in patients with UKA and TKA.

METHODS:

We enrolled all patients who had undergone TKA or UKA as the primary surgical procedure without histories of having undergone either procedure during the preceding 2 years. Matched Cox regression models were used to compare the risks of revision between groups after propensity score matching. Revision was defined as conversion to revision TKA after primary TKA and conversion to TKA after UKA.

RESULTS:

The study enrolled 418,806 TKA patients and 446,009 UKA patients. The risk of revision during the entire study period was higher for patients with UKA than for patients with TKA (adjusted hazard ratio [HR] 1.22, 95% confidence interval [95% CI] 1.10-1.36). The Kaplan-Meier 8-year survival was 98.7% in the TKA group and 96.7% in the UKA group. Patients with UKA were at an increased risk of revision in cases of advanced age (70-79 years, HR 1.40, 95% CI 1.15-1.71), female sex (HR 1.32, 95% CI 1.16-1.49), the presence of chronic obstructive pulmonary disease (COPD) (HR 1.27, 95% CI 1.05-1.54), the presence of peptic ulcer disease (PUD) (HR 1.34, 95% CI 1.11-1.61) compared to patients with TKA. In patients with hemiplegia, however, UKA were associated with a lower risk of subsequent revision (HR 0.25, 95% CI 0.07-0.94).

CONCLUSION:

The risk of a complete exchange or failure was higher for patients with UKA than for patients with TKA. The most significant independent risk factors for subsequent a complete exchange or failure in patients with UKA were advanced age (70-79 years), female sex, and the presence of comorbidities such as COPD and PUD.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Arthroplasty, Replacement, Knee Type of study: Etiology_studies / Incidence_studies / Observational_studies / Prognostic_studies / Risk_factors_studies Limits: Aged / Female / Humans / Male / Middle aged Country/Region as subject: Asia Language: En Journal: Arch Orthop Trauma Surg Year: 2021 Document type: Article

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Arthroplasty, Replacement, Knee Type of study: Etiology_studies / Incidence_studies / Observational_studies / Prognostic_studies / Risk_factors_studies Limits: Aged / Female / Humans / Male / Middle aged Country/Region as subject: Asia Language: En Journal: Arch Orthop Trauma Surg Year: 2021 Document type: Article