Evidence map›Paper›PMID 33907458›Full record

ArticleJournal of pain research2021

Comparison of Predisposing Factors Between Pain on Walking and Pain at Rest in Patients with Knee Osteoarthritis.

Yoshinori Satake, Masashi Izumi, Koji Aso, Yoichi Igarashi, Nao Sasaki, Masahiko Ikeuchi

Open access · goldAbstract read
In one paragraph

Article in Journal of pain research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
2.4field-weighted citation impact, top 11% of its field
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

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 21 citations in OpenAlex.

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  14. Chronic Pain in the Elderly: Mechanisms and Perspectives.Frontiers in human neuroscience · 2022
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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

6 authors at 3 institutions in 1 country.

Yoshinori SatakeDepartment of Orthopaedic Surgery, Kochi Medical School, Kochi University, Kochi, Japan.
Masashi IzumiDepartment of Orthopaedic Surgery, Kochi Medical School, Kochi University, Kochi, Japan.ORCID 0000-0002-8592-6069
Koji AsoDepartment of Orthopaedic Surgery, Kochi Medical School, Kochi University, Kochi, Japan.
Yoichi IgarashiDepartment of Orthopaedic Surgery, Tosa Municipal Hospital, Kochi, Japan.
Nao SasakiMedicines Development Unit Japan, Eli Lilly Japan K.K., Hyogo, Japan.
Masahiko IkeuchiDepartment of Orthopaedic Surgery, Kochi Medical School, Kochi University, Kochi, Japan.
Kōchi University · JPEli Lilly (Japan) · JPSoka Municipal Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposePatients with knee osteoarthritis (OA) complain of various types of pain, divided into two main categories: pain on movement and pain at rest. A thorough understanding of pain is essential for managing knee OA; however, few studies have investigated the mechanisms underlying the two different types of pain. This study aimed to clarify the predisposing factors for pain in patients with knee OA with a focus on differences between pain on walking and pain at rest. PATIENTS AND

methodsThis study involved 93 patients, aged 44-90 years, with knee OA, including 74 women. We assessed demographic variables (sex, age, body mass index [BMI], side), visual analogue scale (VAS) score on walking, VAS score at rest, Kellgren and Lawrence (KL) grade on radiograph, synovitis score and bone marrow lesion (BML) score on magnetic resonance imaging, and pressure pain threshold (PPT), and used univariate and multiple regression analyses to investigate factors predisposing patients to pain at rest or pain on walking.

resultsIn the univariate analyses, we found significant correlations between VAS score on walking and BMI (r=0.31, p<0.01), KL grade (r=0.40, p<0.01), synovitis score (r=0.26, p=0.01), and BML score (r=0.36, p<0.01), whereas VAS score at rest correlated with PPT (r=-0.23, p=0.02) and BMI (r= 0.26, p=0.01). Multiple regression analysis showed that significant explanatory factors for VAS score on walking were BMI (β=0.22, p=0.03) and KL grade (β=0.27, p=0.03). By contrast, PPT was the only significant explanatory factor for VAS score at rest (β=-0.27, p=0.01).

conclusionPredisposing factors were significantly different between pain on walking and pain at rest, indicating that different pain mechanisms exist in the two types of pain. Pain on walking was more strongly associated with mechanical and structural factors, while pain at rest was associated with mechanical hyperalgesia of the knee. CLINICAL REGISTRATION: University Hospital Medical Information Network Clinical Trials Registration number; 000041190.

Indexed as

hyperalgesiaknee osteoarthritispain at rest

Identifiers

PMID33907458
PMCPMC8068486
OpenAlexW3153781628

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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.