Evidence map›Paper›PMID 34754458›Full record

ArticleAnnals of occupational and environmental medicine2020

Work-related factors of knee osteoarthritis in Korean farmers: a cross-sectional study.

Han Soo Song, Dong Hwi Kim, Gwang Chul Lee, Kweon Young Kim, So Yeon Ryu, Chul Gab Lee

Open access · goldAbstract read
In one paragraph

Article in Annals of occupational and environmental medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.4field-weighted citation impact, top 36% 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

5 citing papers in PubMed, 6 citations in OpenAlex.

  1. Association between Daily Physical Activities and Clinical Knee Osteoarthritis: A Community-Based Study.Indian journal of community medicine : official publication of Indian Association of Preventive & Social Medicine · 2026
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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 1 institution in 1 country.

Han Soo SongDepartment of Occupational and Environmental Medicine, Chosun University Hospital, Gwangju, Korea.ORCID https://orcid.org/0000-0001-6000-1572
Dong Hwi KimDepartment of Orthopedic Medicine, Chosun University Hospital, Gwangju, Korea.ORCID https://orcid.org/0000-0001-7011-8504
Gwang Chul LeeDepartment of Orthopedic Medicine, Chosun University Hospital, Gwangju, Korea.ORCID https://orcid.org/0000-0003-1639-414X
Kweon Young KimDepartment of Rehabilitation Medicine, Chosun University Hospital, Gwangju, Korea.ORCID https://orcid.org/0000-0002-7437-3614
So Yeon RyuDepartment of Preventive Medicine, Chosun University Hospital, Gwangju, Korea.ORCID https://orcid.org/0000-0001-5006-1192
Chul Gab LeeDepartment of Occupational and Environmental Medicine, Chosun University Hospital, Gwangju, Korea.ORCID https://orcid.org/0000-0001-7017-2623
Chosun University Hospital · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSeveral studies have reported a high prevalence of osteoarthritis (OA) of the knee among agricultural workers. We investigated work-related factors that increase the risk of knee OA among Korean farmers.

methodsData were extracted from the Jeonnam Center for Farmer's Safety and Health survey, conducted between 2013 and 2015. The sample included 489 farmers (man 240, woman 249). We defined knee OA as radiographic knee OA (≥ Kellgren-Lawrence grade 2) with symptoms (≥ Western Ontario and McMaster Universities Osteoarthritis, Korean version score 29.5). We considered covariates such as cumulative squatting working time (CSWT), cumulative heavy lifting working time (CLWT), body mass index (BMI), and history of knee injury. Odds ratios (ORs) and their corresponding 95% confidence intervals (CIs) were calculated for knee OA and adjusted for relevant covariates.

resultsThe results of multivariate logistic regression analysis indicated that knee OA was correlated by factors such as sex, age, BMI, history of knee injury, CSWT, and CLWT. Particularly, CSWT > 20,000 hours (OR: 2.83; 95% CI: 1.35-5.92; reference < 10,000 hours) and CLWT > 5,000 hours (OR: 2.62; 95% CI: 1.14-6.06; reference < 2,000 hours) were associated with an increased risk of knee OA after adjustment for covariates.

conclusionsSquatting posture and heavy lifting associated with farm work might increase the risk of knee OA among Korean farmers.

Indexed as

AgricultureFarmersKneeKoreaOccupationsOsteoarthritis

Identifiers

PMID34754458
PMCPMC7779842
OpenAlexW3104550836

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

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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.