Evidence map›Paper›PMID 41073585›Full record

ArticleJournal of medical ultrasonics (2001)2026

Relationship between knee joint angles and infrapatellar fat pad stiffness in patients with knee osteoarthritis.

Shinya Ogaya, Satoshi Horiguchi, Riona Kaizu, Mai Tomita, Moko Kitahara, Kenta Horiuchi, Satoshi Kido, Takashi Matsuno

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Article in Journal of medical ultrasonics (2001), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Shinya OgayaDepartment of Physical Therapy, School of Health and Social Services, Saitama Prefectural University, 820 Sannomiya, Koshigaya-shi, Saitama, Japan. ogaya-shinya@spu.ac.jp.ORCID http://orcid.org/0000-0001-6145-8654
Satoshi HoriguchiDepartment of Physical Therapy, School of Health and Social Services, Saitama Prefectural University, 820 Sannomiya, Koshigaya-shi, Saitama, Japan.
Riona KaizuDepartment of Physical Therapy, School of Health and Social Services, Saitama Prefectural University, 820 Sannomiya, Koshigaya-shi, Saitama, Japan.
Mai TomitaDepartment of Physical Therapy, School of Health and Social Services, Saitama Prefectural University, 820 Sannomiya, Koshigaya-shi, Saitama, Japan.
Moko KitaharaDepartment of Physical Therapy, School of Health and Social Services, Saitama Prefectural University, 820 Sannomiya, Koshigaya-shi, Saitama, Japan.
Kenta HoriuchiGraduate School of Health and Social Services, Saitama Prefectural University, Koshigaya, Japan.
Satoshi KidoDepartment of Physical Therapy, School of Health and Social Services, Saitama Prefectural University, 820 Sannomiya, Koshigaya-shi, Saitama, Japan.
Takashi MatsunoDepartment of Rehabilitation, Tanaka Family Clinic, Saitama, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe infrapatellar fat pad (IFP) is a source of pain in patients with knee osteoarthritis (OA). Changes in pressure due to knee joint movement may increase IFP stiffness and potentially cause pain. This study aimed to investigate changes in IFP stiffness during knee flexion in knee OA patients.

methodsSixteen patients with knee OA and 14 healthy elderly controls participated in this study. IFP stiffness was measured with the patient in the supine position at maximum knee extension, 45°, 90°, and maximum flexion using ultrasound elastography. Stiffness was measured at the superficial layer of the IFP, located beneath the patellar tendon. Additionally, the knee pain score for knee OA patients was assessed using the numeric rating scale and the Intermittent and Constant Osteoarthritis Pain (ICOAP).

resultsTwo-way analysis of variance showed a significant main effect for group and joint angle, as well as an interaction effect. IFP stiffness increased with knee flexion. Knee OA patients exhibited significantly higher IFP stiffness at both maximum knee extension and flexion than the control group. A significant correlation was found between IFP stiffness in knee OA patients at 45°, 90°, and maximum knee flexion and ICOAP intermittent pain.

conclusionThese results suggest that knee movement affects IFP stiffness, with increased stiffness observed in knee OA patients. Increased stiffness in OA patients may contribute to knee pain, particularly at mid-to-deep flexion angles.

Indexed as

Adipose TissueKnee JointOsteoarthritis, KneeAgedCase-Control StudiesElasticity Imaging TechniquesFemaleHumansMaleMiddle AgedPain MeasurementPatellaRange of Motion, ArticularElastographyInfrapatellar fat padKnee flexionKnee osteoarthritisPain

Identifiers

PMID41073585

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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.