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- Factors related to femoral bowing among Korean female farmers: a cross-sectional study
- Sangyoon Do, Chul Gab Lee, Dong Hwi Kim, GwangChul Lee, Kweon Young Kim, So Yeon Ryu, Hansoo Song
- Ann Occup Environ Med 2020;32:e23. Published online July 2, 2020
- DOI: https://doi.org/10.35371/aoem.2020.32.e23
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ePub Background Female farmers have a high prevalence of knee osteoarthritis (KOA) in South Korea. Femoral bowing has been reported to be related to KOA by increasing load on the mechanical axis. This study aimed to investigate factors related to femoral bowing in Korean female farmers.
Methods We analyzed the legs of 264 female farmers registered with the Korea farmers' knee cohort of Jeonnam Center for Farmers' Safety and Health. A structured questionnaire was used to determine sociodemographic variables, agricultural career, cumulative squatting working time (CSWT), and cumulative heavy lifting working time. Femoral bone density was measured and Kellgren-Lawrence (KL) grades were obtained from the knee radiographs. Mechanical axis angle (MAA), femoral bowing angle (FBA), anatomical lateral distal femoral angle (aLDFA), anatomical medial proximal tibial angle (aMPTA), and condylar-plateau angle (CPA) were measured. We examined the relationship between the FBA and related factors by using multiple linear regression.
Results The proportion of individuals with radiographic KOA (≥ KL grade 2) in this study was 37.9%. As KL grades increased, MAA, FBA, and CPA increased, whereas aLDFA and aMPTA decreased. FBA increased with age. Multiple linear regression analyses using FBA as a dependent variable showed relationship with higher age, lower height, higher BMI, lower bone mineral density, longer CSWT, and longer agricultural careers.
Conclusions The results of this study suggest that external factors related to agricultural work in female farmers was associated with femoral bowing, in addition to internal factors such as age, bone density, height, and obesity.
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Citations
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Annals of Occupational and Environmental Medicine.2022;[Epub] CrossRef - Work-related factors of knee osteoarthritis in Korean farmers: a cross-sectional study
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