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Predictors of Midterm Outcomes after Medial Unicompartmental Knee Arthroplasty in Asians.
Clin Orthop Surg 2017; 9(4):432-438CO

Abstract

Background

This study was designed to evaluate predictors of good outcomes following medial unicompartmental knee arthroplasty (UKA) in Asian patients.

Methods

Registry data of patients who underwent primary unilateral medial UKA from 2006 to 2011 were collected. Outcomes studied were the Oxford Knee Score (OKS) and the Physical Component Score (PCS) of the Short Form 36 (SF-36) questionnaire. These outcome scores were collected prospectively, pre- and postoperatively up to 5 years. Good outcome was defined as an overall improvement in score greater than or equal to the minimal clinically important difference (MCID). The MCID for the OKS was 5 while the MCID for the PCS was 10. Regression analysis was used to identify predictors of good outcomes following medial UKA.

Results

Primary medial UKA was performed in 1,075 patients. Higher (poorer) preoperative OKS (odds ratio [OR], 1.27; p < 0.001), lower (poorer) preoperative PCS (OR, 1.08; p < 0.001), lower (poorer) preoperative Knee Society Knee Score (KSKS; OR, 1.02; p < 0.001) and higher (better) preoperative SF-36 Mental Component Score (MCS; OR, 1.02; p < 0.001) were significant predictors of good outcomes.

Conclusions

Patients with poorer OKS, PCS and KSKS and better SF-36 MCS preoperatively tended to achieve good outcomes by the MCID criterion at 5 years following the index surgery.

Authors+Show Affiliations

Department of Orthopaedic Surgery, Singapore General Hospital, Singapore.Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore.Department of Orthopaedic Surgery, Singapore General Hospital, Singapore.Department of Orthopaedic Surgery, Singapore General Hospital, Singapore.Department of Orthopaedic Surgery, Singapore General Hospital, Singapore.Department of Orthopaedic Surgery, Singapore General Hospital, Singapore.Department of Orthopaedic Surgery, Singapore General Hospital, Singapore.Department of Orthopaedic Surgery, Singapore General Hospital, Singapore.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29201296

Citation

Bin Abd Razak, Hamid Rahmatullah, et al. "Predictors of Midterm Outcomes After Medial Unicompartmental Knee Arthroplasty in Asians." Clinics in Orthopedic Surgery, vol. 9, no. 4, 2017, pp. 432-438.
Bin Abd Razak HR, Acharyya S, Tan SM, et al. Predictors of Midterm Outcomes after Medial Unicompartmental Knee Arthroplasty in Asians. Clin Orthop Surg. 2017;9(4):432-438.
Bin Abd Razak, H. R., Acharyya, S., Tan, S. M., Pang, H. N., Tay, K. D., Chia, S. L., ... Yeo, S. J. (2017). Predictors of Midterm Outcomes after Medial Unicompartmental Knee Arthroplasty in Asians. Clinics in Orthopedic Surgery, 9(4), pp. 432-438. doi:10.4055/cios.2017.9.4.432.
Bin Abd Razak HR, et al. Predictors of Midterm Outcomes After Medial Unicompartmental Knee Arthroplasty in Asians. Clin Orthop Surg. 2017;9(4):432-438. PubMed PMID: 29201296.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Predictors of Midterm Outcomes after Medial Unicompartmental Knee Arthroplasty in Asians. AU - Bin Abd Razak,Hamid Rahmatullah, AU - Acharyya,Sanchalika, AU - Tan,Shi-Ming, AU - Pang,Hee-Nee, AU - Tay,Keng-Jin Darren, AU - Chia,Shi-Lu, AU - Lo,Ngai-Nung, AU - Yeo,Seng-Jin, Y1 - 2017/11/10/ PY - 2017/08/03/received PY - 2017/09/20/accepted PY - 2017/12/5/entrez PY - 2017/12/5/pubmed PY - 2018/2/8/medline KW - Arthroplasty KW - Asia KW - Knee KW - Osteoarthritis KW - Registries SP - 432 EP - 438 JF - Clinics in orthopedic surgery JO - Clin Orthop Surg VL - 9 IS - 4 N2 - Background: This study was designed to evaluate predictors of good outcomes following medial unicompartmental knee arthroplasty (UKA) in Asian patients. Methods: Registry data of patients who underwent primary unilateral medial UKA from 2006 to 2011 were collected. Outcomes studied were the Oxford Knee Score (OKS) and the Physical Component Score (PCS) of the Short Form 36 (SF-36) questionnaire. These outcome scores were collected prospectively, pre- and postoperatively up to 5 years. Good outcome was defined as an overall improvement in score greater than or equal to the minimal clinically important difference (MCID). The MCID for the OKS was 5 while the MCID for the PCS was 10. Regression analysis was used to identify predictors of good outcomes following medial UKA. Results: Primary medial UKA was performed in 1,075 patients. Higher (poorer) preoperative OKS (odds ratio [OR], 1.27; p < 0.001), lower (poorer) preoperative PCS (OR, 1.08; p < 0.001), lower (poorer) preoperative Knee Society Knee Score (KSKS; OR, 1.02; p < 0.001) and higher (better) preoperative SF-36 Mental Component Score (MCS; OR, 1.02; p < 0.001) were significant predictors of good outcomes. Conclusions: Patients with poorer OKS, PCS and KSKS and better SF-36 MCS preoperatively tended to achieve good outcomes by the MCID criterion at 5 years following the index surgery. SN - 2005-4408 UR - https://www.unboundmedicine.com/medline/citation/29201296/Predictors_of_Midterm_Outcomes_after_Medial_Unicompartmental_Knee_Arthroplasty_in_Asians_ L2 - https://www.ecios.org/DOIx.php?id=10.4055/cios.2017.9.4.432 DB - PRIME DP - Unbound Medicine ER -