| 제목 |
Back Pain and Depletion of Back and Skeletal Muscle in Korean Fishery Workers |
| 소속 |
Inje University Busan Paik Hospital, Department of Physical Medicine and Rehabilitation1, Inje University College of Medicine, Department of Occupational and Environmental Medicine2 |
| 저자 |
Heesung Nam1*, Nami Han1†, Hyun dong Kim1, Mi ja Eom1, JeeYoung Kim1, MinJung Kook1, JeongHo Kim2 |
OBJECTIVE
Low back pain and disability are major public health problems. There are many reports that have been studied on how muscle depletion affects lower back pain in various groups; carpenters, automobile mechanics, office workers, nursing aides and construction workers. We aimed to reveal the relationship between muscle depletion and low back pain in Korean fishery workers as a different occupational cluster which has unstable working floor.
METHODS
The medical records of 104 people who participated in the health examination business for elderly fishery workers were retrospectively reviewed. In total, 50 patients with lower back pain and 54 patients without lower back pain were included. Skeletal muscle mass index (SMI) and body composition measured by bioelectrical impedance analysis (BIA) was reviewed. Cross sectional area (CSA) of multifidus and erector spinae was measured in magnetic resonance image (MRI). Participants were divided into group A (back pain) and group B (without back pain) based on their visual analogue scale (VAS). Oswestry disability index (ODI) was selected for the indicator of disability from back pain and reviewed in group A. We used independent t-test analysis to compare body composition variables and back muscle depletion of two groups. (Table 2) Correlation between measured variables and pain and disability scores were calculated by Pearson’s correlation coefficient analysis in group A. (Table 3)
RESULTS
Subject characteristics are summarized in Table 1. The average of age was 64.1±9.7 years in group A and 62.2±9.3 in group B. The average of VAS was 4.1±2.2 in group A. Out of 104 participants, 50 (48%) suffered from back pain. In the comparison of group A and B, only skeletal muscle mass, muscle mass, paraspinal CSA showed significant differences. In group A, muscle mass and lumbar CSA showed significant correlation with VAS. No variable showed significant result with ODI.
CONCLUSION
Fishery walkers included in this study have higher prevalence of back pain rated 48% compared to previous reports about other occupational group; 22.6% in construction laborers, 18.8% in nursing aides. Skeletal muscle mass measured by BIA and CSA of paraspinal muscle can be an indicator of back pain among fishery walkers. Measuring muscle mass by BIA may be used as a periodic screening tool for back pain with advantage of cost-effectiveness. Further prospective study is needed to reveal the influence of skeletal or paraspinal muscle mass to back pain and the possible difference from other occupational group.
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Table 1. Participant characteristics
Table 2. Comparison of low back pain group (A) and without back pain group (B)
Table 3. Correlations between muscle related measures and back pain, disability score
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