Do Sangyoon, Lee Chul Gab, Kim Dong Hwi, Lee GwangChul, Kim Kweon Young, Ryu So Yeon, Song Hansoo
Department of Occupational and Environmental Medicine, Chosun University Hospital, Gwangju, Korea.
Department of Orthopedic Medicine, Chosun University Hospital, Gwangju, Korea.
Ann Occup Environ Med. 2020 Jul 2;32:e23. doi: 10.35371/aoem.2020.32.e23. eCollection 2020.
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.
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.
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.
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.
在韩国，女性农民膝骨关节炎（KOA）的患病率较高。据报道，股骨弯曲通过增加机械轴上的负荷与KOA相关。本研究旨在调查韩国女性农民股骨弯曲的相关因素。
我们分析了全罗南道农民安全与健康中心韩国农民膝关节队列登记的264名女性农民的腿部情况。使用结构化问卷来确定社会人口统计学变量、农业工作年限、累计蹲姿工作时间（CSWT）和累计重物搬运工作时间。测量股骨骨密度，并从膝关节X光片中获得Kellgren-Lawrence（KL）分级。测量机械轴角（MAA）、股骨弯曲角（FBA）、解剖学外侧股骨远端角（aLDFA）、解剖学内侧胫骨近端角（aMPTA）和髁-平台角（CPA）。我们通过多元线性回归研究FBA与相关因素之间的关系。
本研究中影像学诊断为KOA（≥KL分级2级）的个体比例为37.9%。随着KL分级增加，MAA、FBA和CPA增加，而aLDFA和aMPTA降低。FBA随年龄增加。以FBA为因变量的多元线性回归分析显示，FBA与年龄较大、身高较低、体重指数较高、骨矿物质密度较低、CSWT较长以及农业工作年限较长有关。
本研究结果表明，除年龄、骨密度、身高和肥胖等内在因素外，女性农民与农业工作相关的外在因素也与股骨弯曲有关。
