Department of Orthopaedic Surgery, Queen Ingrid's Hospital, Nuuk, Greenland.
Arctic Health Research Centre, Department of Clinical Medicine, Aalborg University Hospital, 9000, Aalborg, Denmark.
J Orthop Surg Res. 2021 May 25;16(1):335. doi: 10.1186/s13018-021-02482-7.
Hip geometry influences hip fracture risk. Hip fractures are common, and they are associated with pain, disability, premature death and marked costs on society. Osteoporotic fractures are frequent in Arctic populations and increase with advancing age in this society with a steep rise in life expectancy. Greenland Inuit is a distinct ethnic group, and data on hip geometry is missing. We thus aimed to describe hip geometry in 7.7 years of consecutive hip fracture patients in Greenland.
We evaluated collodiaphysial angle, femoral neck length, the outer and inner diameter of the femur at 2 and 5 centimetres below the centre of the lesser trochanter and the cortical thickness from pelvic and hip radiographs in all patients operated in Greenland over 7.7 years. We included all 84 patients with one non-fractured hip visible for geometric analysis. Analyses were conducted in duplicate.
We found a collodiaphysial angle of 134.8/132.6 in men/women (p = 0.06) and a femoral neck length of 38.0/33.9 mm in men/women (p = 0.001). Cortical thickness was affected by sex in the adjusted analysis (p < 0.001). Cortical thickness index at 5 cm below the centre of the lesser trochanter decreased with age (p = 0.026) and may be influenced by height (2 cm below the centre of the lesser trochanter, p = 0.053).
Our findings differed from European data and suggest a delicate balance in hip geometry in Arctic populations. Ethnic peculiarities influence the structure of the hip and may influence fracture risk. A focus on hip geometry and risk factors for osteoporotic fractures in Arctic populations is warranted.
髋部几何形状会影响髋部骨折的风险。髋部骨折很常见，会引起疼痛、残疾、早逝，并给社会带来巨大的经济负担。在北极人群中，骨质疏松性骨折很常见，并且在这个预期寿命急剧上升的社会中，随着年龄的增长而增加。格陵兰因纽特人是一个独特的族群，有关髋部几何形状的数据尚不清楚。因此，我们旨在描述格陵兰连续 7.7 年髋部骨折患者的髋部几何形状。
我们评估了所有在格陵兰接受手术的患者的骨盆和髋关节 X 光片上的骼股角、股骨颈长度、小转子中心下方 2 厘米和 5 厘米处股骨的外径和内径以及皮质厚度。我们纳入了所有 84 名可见一侧未骨折髋部进行几何分析的患者。分析进行了两次重复。
我们发现男性的骼股角为 134.8/132.6（p = 0.06），女性为 134.8/132.6，股骨颈长度为 38.0/33.9 毫米（p = 0.001）。在调整后的分析中，皮质厚度受到性别的影响（p < 0.001）。小转子中心下方 5 厘米处的皮质厚度指数随年龄的增长而降低（p = 0.026），并且可能受到身高的影响（小转子中心下方 2 厘米处，p = 0.053）。
我们的研究结果与欧洲数据不同，表明北极人群的髋部几何形状存在微妙的平衡。族群特殊性会影响髋部结构，并可能影响骨折风险。需要关注北极人群的髋部几何形状和骨质疏松性骨折的危险因素。
