Evidence map›Paper›PMID 36449045›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2023

Variability of functional knee phenotype for coronal alignment in advanced varus knee osteoarthritis in the Japanese population.

Wang Huan, Tomoharu Mochizuki, Osamu Tanifuji, Hiroyuki Kawashima

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Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed, 1 pooled it
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1 · What the graph read from it

What it found

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3 · Its place in the literature

Who cites it

5 citing papers in PubMed, 1 synthesis or guideline pooled it.

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4 · The record

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5 · Who and what money

Authors and funding

4 authors.

Wang HuanDivision of Orthopedic Surgery, Niigata University Medical and Dental Hospital, 1-757 Asahimachi-dori Chuo-ku, Niigata City, 951-8510, Japan.
Tomoharu MochizukiDivision of Orthopedic Surgery, Niigata University Medical and Dental Hospital, 1-757 Asahimachi-dori Chuo-ku, Niigata City, 951-8510, Japan. tommochi121710@gmail.com.ORCID http://orcid.org/0000-0003-2565-0221
Osamu TanifujiDivision of Orthopedic Surgery, Niigata University Medical and Dental Hospital, 1-757 Asahimachi-dori Chuo-ku, Niigata City, 951-8510, Japan.
Hiroyuki KawashimaDivision of Orthopedic Surgery, Niigata University Medical and Dental Hospital, 1-757 Asahimachi-dori Chuo-ku, Niigata City, 951-8510, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeNew concept of functional knee phenotypes in Caucasians demonstrated the variability of coronal alignment in knee osteoarthritis (OA), but it remains unclear in Japanese. This study aims to analyze the knee phenotype in advanced varus knee OA for Japanese. In addition, the ethnical difference is discussed.

methodsThis study analyzed 879 knees involving 186 males (74 years) and 693 females (74 years). The knee phenotypes were assessed by the definition in Hirschmann's group. The hip-knee-ankle angle (HKA), femoral mechanical angle (FMA) and tibial mechanical angle (TMA) were assessed in CT data according to the coordinate system. The neutral angle was 180° in HKA, 93° in FMA and 87° in TMA. The smaller angle means larger varus angles.

resultsThe average angle (males, females) of the HKA (170.9 ± 4.3°, 169.4 ± 5.0°), FMA (91.5 ± 2.7°, 90.6 ± 3.0°), and TMA (82.4 ± 3.6°, 82.7 ± 3.7°) demonstrated varus angles with the sex difference (HKA, p < 0.001; FMA, p = 0.001). The phenotypes were 73 types in males and 150 types in females with a mild correlation between the HKA and the FMA or TMA. In 61.3% of males and 52.2% of females, the TMA was greater than the FMA, while the FMA was greater in 16.7% of males and 23.1% of females.

conclusionThere were many functional knee phenotypes with sex differences for advanced varus knee OA in Japanese, showing ethnical differences of larger varus angles compared to those for Caucasians in the previous report. LEVEL OF EVIDENCE: IV.

Indexed as

Osteoarthritis, KneeBiomechanical PhenomenaEast Asian PeopleFemaleHumansKnee JointMalePhenotypeRetrospective StudiesTibiaCoronal knee phenotype classificationEthnical differenceJapaneseSex differenceVarus knee osteoarthritis

Identifiers

PMID36449045

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.