Evidence map›Paper›PMID 32993609›Full record

ArticleBMC musculoskeletal disorders2020

Absence of pain in subjects with advanced radiographic knee osteoarthritis.

Kyeong Min Son, Jeong Im Hong, Dong-Hyun Kim, Dae-Gyu Jang, Michel D Crema, Hyun Ah Kim

Open access · goldAbstract read
In one paragraph

Article in BMC musculoskeletal disorders, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 1 pooled it
4.9field-weighted citation impact, top 4% 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

36 citing papers in PubMed, 1 synthesis or guideline pooled it, 65 citations in OpenAlex.

  1. Pooled it
  2. Trial
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  6. Article
  7. Review
  8. Canadian journal of pain = Revue canadienne de la douleur · 2026
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Emerging Therapy in Osteoarthritis: Mesenchymal Stem Cells, Secretomes, and Using Hydrogels to Enhance Efficacy.BioDrugs : clinical immunotherapeutics, biopharmaceuticals and gene therapy · 2025
    Review
  14. Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. 9. Chronic knee pain.Pain practice : the official journal of World Institute of Pain · 2025
    Review
  20. Article
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 6 institutions in 2 countries.

Kyeong Min SonDivision of Rheumatology, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, 896, Pyongchon, Hwaseong-si, Anyang, Kyunggi, 431-070, South Korea.
Jeong Im HongDivision of Rheumatology, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Kyunggi, South Korea.
Dong-Hyun KimDeparment of Social and Preventive Medicine, Hallym University College of Medicine, Chuncheon, Kangwon, South Korea.
Dae-Gyu JangDepartment of Statistics, Seoul National University, Gwanak, Seoul, South Korea.
Michel D CremaDepartment of Radiology, Boston University School of Medicine, Boston, Massachusetts, USA.
Hyun Ah KimDivision of Rheumatology, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Kyunggi, South Korea. kimha@hallym.ac.kr.ORCID http://orcid.org/0000-0002-9318-7446
Boston University · USHallym University · KRHallym University Dongtan Sacred Heart Hospital · KRHallym University Sacred Heart Hospital · KRSacred Heart Hospital · USSeoul National University · KR

Funding

the Basic Science Research Program through the National Research Foundation (NRF) of Korea funded by the Ministry of Education 2017R1A2B2001881the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea HI16C0287
6 · The paper itself

Abstract

backgroundTo investigate the frequency of pain among subjects with advanced radiographic knee osteoarthritis (OA) defined as Kellgren-Lawrence (KL) grade 4 and clinical features associated with pain.

methodsSubjects from the Hallym Aging Study (HAS), the Korean National Health and Nutrition Examination Survey (KNHANES), and the Osteoarthritis Initiative (OAI) were included. Participants were asked knee-specific questions regarding the presence of knee pain. Clinical characteristics associated with the presence of pain were evaluated with multivariable logistic regression analysis.

resultsThe study population consisted of 504, 10,152 and 4796 subjects from HAS, KNHANES, and OAI, respectively. KL grade 4 OA was identified in 9.3, 7.6, and 11.5% of subjects, while pain was absent in 23.5, 31.2, and 5.9% of subjects in KL grade 4 knee OA, respectively. After multivariable analysis, female gender showed a significant association with pain in the KNHANES group, while in the OAI group, younger age did. Advanced knee OA patients without pain did not differ from non-OA subjects in most items of SF-12 in both Korean and OAI subjects. Total WOMAC score was not significantly different between non-OA and advanced knee OA subjects without pain in the OAI.

conclusionsOur study showed that a considerable number of subjects with KL grade 4 OA did not report pain. In patients whose pain arises from causes other than structural damage of the joint, therapeutic decision based on knee X-ray would lead to suboptimal result. In addition, treatment options focusing solely on cartilage engineering, should be viewed with caution.

Indexed as

Osteoarthritis, KneeFemaleHumansKnee JointNutrition SurveysPainRadiographyKneeOsteoarthritisPain

Identifiers

PMID32993609
PMCPMC7526196
OpenAlexW3090707130

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.