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Prevalence and risk factor analysis of lower extremity abnormal alignment characteristics among rice farmers

Authors Karukunchit U, Puntumetakul R, Swangnetr M, Boucaut R

Received 30 January 2015

Accepted for publication 25 April 2015

Published 17 June 2015 Volume 2015:9 Pages 785—795

DOI https://doi.org/10.2147/PPA.S81898

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Dr Johnny Chen

Usa Karukunchit,1,2 Rungthip Puntumetakul,1,3 Manida Swangnetr,1,4 Rose Boucaut5

1Research Center in Back, Neck, Other Joint Pain and Human Performance (BNOJPH), 2Faculty of Associated Medical Sciences, Khon Kaen University, 3School of Physical Therapy, Faculty of Associated Medical Sciences, Khon Kaen University, 4Department of Production Technology, Faculty of Technology, Khon Kaen University, Khon Kaen, Thailand; 5School of Health Sciences (Physiotherapy), iCAHE (International Centre for Allied Health Evidence), Sansom Institute for Health Research, University of South Australia, Adelaide, SA, Australia

Background: Rice farming activities involve prolonged manual work and human–machine interaction. Prolonged farming risk-exposure may result in lower limb malalignment. This malalignment may increase the risk of lower extremity injury and physical disabilities. However, the prevalence and factors associated with lower extremity malalignment have not yet been reported. This study aimed to investigate the prevalence and risk factors of lower extremity malalignment among rice farmers.
Methods: A cross-sectional survey was conducted with 249 rice farmers. Lower extremity alignment assessment included: pelvic tilt angle, limb length equality, femoral torsion, quadriceps (Q) angle, tibiofemoral angle, genu recurvatum, rearfoot angle, and medial longitudinal arch angle. Descriptive statistics were used to analyze participant characteristics and prevalence of lower extremity malalignment. Logistic regression analysis was used to identify risk factors.
Results: The highest prevalence of lower extremity malalignment was foot pronation (36.14%), followed by the abnormal Q angle (34.94%), tibiofemoral angle (31.73%), pelvic tilt angle (30.52%), femoral antetorsion (28.11%), limb length inequality (22.49%), tibial torsion (21.29%), and genu recurvatum (11.24%). In females, the risk factors were abnormal Q angle, tibiofemoral angle, and genu recurvatum. Being overweight was a risk factor for abnormal pelvic tilt angle, Q angle, and tibiofemoral angle. Age was a risk factor for limb length inequality. Years of farming were a major risk factor for abnormal Q angle, tibiofemoral angle, and foot malalignment.
Conclusion: Prevalence of lower extremity malalignment was reported in this study. Female sex, being overweight, and years of farming were major risk factors for lower extremity mal­alignment. Lower extremity screening should assist in the identification of foot and knee mal­alignment in rice farmers. This may then lead to early prevention of musculoskeletal disorders arising from such malalignment.

Keywords: lower extremity malalignment, prevalence, rice farmer, risk factors

A Letter to the Editor has been received and published for this article.


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