PMID- 27324635
OWN - NLM
STAT- MEDLINE
DCOM- 20180611
LR  - 20220409
IS  - 1433-7347 (Electronic)
IS  - 0942-2056 (Linking)
VI  - 25
IP  - 11
DP  - 2017 Nov
TI  - The minimal clinically important difference for Knee Society Clinical Rating 
      System after total knee arthroplasty for primary osteoarthritis.
PG  - 3354-3359
LID - 10.1007/s00167-016-4208-9 [doi]
AB  - PURPOSE: The Knee Society Clinical Rating System (KS) is one of the most popular 
      tools used to assess patient outcome after total knee arthroplasty (TKA), but its 
      minimal clinically important difference (MCID) has not been identified. This 
      study aims to identify the MCID of KS function score (KS-FS) and knee score 
      (KS-KS) after TKA in patients with primary knee osteoarthritis. METHODS: The 
      authors retrospectively analysed patients who underwent TKA for primary knee 
      osteoarthritis between 2005 and 2015 in a single institution. KS-FS, KS-KS, and 
      Oxford Knee Score (OKS) were collected pre-operatively and 2 years 
      post-operatively. Patient satisfaction with TKA at 2 years was also collected. 
      Anchor-based approach with 2 external indicators was used. The MCID for KS-FS and 
      KS-KS was determined using simple linear regression according to patient 
      satisfaction with TKA and the MCID of OKS. RESULTS: The mean age of the 550 
      subjects studied was 66 +/- 8 years. There were 373 (67.8 %) female subjects. The 
      KS-FS improved by 22.8 (95 % CI 20.9-24.6) points, and the KS-KS improved by 44.4 
      (95 % CI 42.6-46.3) points. The MCID identified for KS-FS is between 6.1 (95 % CI 
      5.1-7.1) and 6.4 (95 % CI 4.4-8.4) and between 5.3 (95 % CI 4.3-6.3) and 5.9 
      (95 % CI 3.9-7.8) for KS-KS. CONCLUSIONS: This is the first study, to the 
      knowledge of the authors, to identify the MCID of KS. This will allow future 
      trials to have an accurate prediction of sample size. Clinically, physicians will 
      be able to better interpret outcomes of TKA studies to guide a treatment option. 
      LEVEL OF EVIDENCE: IV.
FAU - Lee, Wu Chean
AU  - Lee WC
AUID- ORCID: 0000-0002-7524-9404
AD  - Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, 
      Singapore, 169608, Singapore. leewuchean@yahoo.com.
FAU - Kwan, Yu Heng
AU  - Kwan YH
AD  - Program in Health Services and Systems Research, Duke-NUS Medical School, 8 
      College Road, Singapore, 169857, Singapore.
AD  - Centre of Quantitative Medicine, Office of Clinical Sciences, Duke-NUS Medical 
      School, 8 College Road, Singapore, 169857, Singapore.
AD  - Department of Pharmacy, Khoo Teck Puat Hospital, 90 Yishun Central, Singapore, 
      768828, Singapore.
FAU - Chong, Hwei Chi
AU  - Chong HC
AD  - Orthopaedic Diagnostic Centre, Singapore General Hospital, Outram Road, 
      Singapore, 169608, Singapore.
FAU - Yeo, Seng Jin
AU  - Yeo SJ
AD  - Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, 
      Singapore, 169608, Singapore.
LA  - eng
PT  - Journal Article
DEP - 20160621
PL  - Germany
TA  - Knee Surg Sports Traumatol Arthrosc
JT  - Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA
JID - 9314730
SB  - IM
MH  - Aged
MH  - Arthroplasty, Replacement, Knee/*rehabilitation
MH  - Female
MH  - *Health Status Indicators
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - *Minimal Clinically Important Difference
MH  - Osteoarthritis, Knee/*surgery
MH  - Patient Satisfaction
MH  - Retrospective Studies
OTO - NOTNLM
OT  - Knee Society Clinical Rating System
OT  - Minimal clinical important difference
OT  - Total knee arthroplasty
EDAT- 2016/06/22 06:00
MHDA- 2018/06/12 06:00
CRDT- 2016/06/22 06:00
PHST- 2016/02/21 00:00 [received]
PHST- 2016/06/08 00:00 [accepted]
PHST- 2016/06/22 06:00 [pubmed]
PHST- 2018/06/12 06:00 [medline]
PHST- 2016/06/22 06:00 [entrez]
AID - 10.1007/s00167-016-4208-9 [pii]
AID - 10.1007/s00167-016-4208-9 [doi]
PST - ppublish
SO  - Knee Surg Sports Traumatol Arthrosc. 2017 Nov;25(11):3354-3359. doi: 
      10.1007/s00167-016-4208-9. Epub 2016 Jun 21.