Machino Masaaki, Nakashima Hiroaki, Ito Keigo, Ando Kei, Ito Sadayuki, Kato Fumihiko, Imagama Shiro
Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya 466-8550, Japan.
Department of Orthopedic Surgery, Chubu Rosai Hospital, Japan Organization of Occupational Health and Safety, 1-10-6 Komei, Minato-ku, Nagoya 455-8530, Japan.
J Clin Med. 2022 Jun 9;11(12):3301. doi: 10.3390/jcm11123301.
Magnetic resonance imaging (MRI) system has frequently observed degenerative changes in the cervical discs of healthy subjects. Although there are concerns regarding the link between an individual's occupation and intervertebral disc degeneration (IDD) in the cervical spine, whether the occupation affects IDD is still not clear. This study aimed to evaluate the occupation and IDD interplay using cervical spine MRI among a cohort of healthy individuals, and to evaluate any association between the type of labor and IDD. Using MRI, we prospectively measured at every level, the anteroposterior (AP) intervertebral disc diameter and disc height, in a cohort of 1211 healthy volunteers (606 (50%) male; mean age, 49.5 years). Using a minimum of 100 male and female each from the third to eighth decades of age (20-79 years), IDD was evaluated based on the modified Pfirrmann classification system to derive a disc degeneration score (DDS). We also measured the AP diameters of disc protrusion and of the dural sac as well as the spinal cord. The overall DDS and number of disc protrusions increased with age. Among 11 occupations, there were no significant differences in AP diameter of the dural sac as well as the spinal cord. For the four labor types (heavy object handling, same position maintenance, cervical extension position, and cervical flexion position), there were no significant differences in overall DDS and number of disc protrusions, with or without work. Also, among the four labor types, there were no significant differences in the AP diameter of the dural sac as well as the spinal cord. In this cross-sectional survey of cervical spine MRI data among healthy adult volunteers, occupation and type of labor might have no effect on IDD in the cervical spine.
磁共振成像（MRI）系统经常在健康受试者的颈椎椎间盘中观察到退行性变化。尽管人们关注个体职业与颈椎椎间盘退变（IDD）之间的联系，但职业是否会影响IDD仍不清楚。本研究旨在通过对一组健康个体进行颈椎MRI检查来评估职业与IDD之间的相互作用，并评估劳动类型与IDD之间的任何关联。我们使用MRI对1211名健康志愿者（606名（50%）男性；平均年龄49.5岁）的队列进行前瞻性测量，测量每个节段的前后（AP）椎间盘直径和椎间盘高度。从20 - 79岁的第三至第八个十年中各选取至少100名男性和女性，根据改良的Pfirrmann分类系统评估IDD，以得出椎间盘退变评分（DDS）。我们还测量了椎间盘突出和硬脊膜囊以及脊髓的AP直径。总体DDS和椎间盘突出的数量随年龄增加。在11种职业中，硬脊膜囊和脊髓的AP直径没有显著差异。对于四种劳动类型（重物搬运、保持同一姿势、颈椎伸展位和颈椎屈曲位），无论是否工作，总体DDS和椎间盘突出的数量均无显著差异。此外，在这四种劳动类型中，硬脊膜囊和脊髓的AP直径也没有显著差异。在这项对健康成年志愿者颈椎MRI数据的横断面调查中，职业和劳动类型可能对颈椎的IDD没有影响。
