• 국제지역연구
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• 제14권3호
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• pp.267-289
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• 2010

본 연구는 아시아지역에서의 한국과 일본의 대 아시아지역 직접투자의 특성을 거시적 측면과 미시적 측면으로 구분하여 분석하였다. 거시적 측면에서는 시장지향적 특성과 생산효율지향적 특성이 강한지를 다중회귀분석으로, 미시적 특성으로는 투자유형(합작 단독)과 투자규모, 노동집약도, 임금, 본사 파견 노동자 비율 등의 관계를 로지스틱회귀분석으로 분석하였다. 대체로 한국은 시장지향적 및 생산효율지향적 특성에서 2000년 이후 대체로 시장지향적 특성으로 전환되었고 일본은 생산효율지향적 특성에서 2000년 이후 대체로 시장지향적 및 생산효율지향적 특성으로 전환되었다. 한편 투자유형면에서는 한국과 일본 모두 GDP가 증가할수록, 파견노동자의 비율이 높을수록 단독투자를 선호하는 경향이 높은 것으로 나타났다. 한국은 투자규모가 클수록 현지임금이 높을수록 합작투자를, 일본은 자본집약도가 높을수록 단독투자를 선호하는 것으로 나타났다.

• Journal of Korean Neurosurgical Society
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• 제65권5호
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• pp.719-729
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• 2022

Objective : The ossification of the ligamentum flavum (OLF) is one of the major causes of thoracic myelopathy. Surgical decompression with or without instrumented fusion is the mainstay of treatment. However, few studies have reported on the added effect of instrumented fusion. The objective of this study was to compare clinical and radiological outcomes between surgical decompression without instrumented fusion (D-group) and that with instrumented fusion (F-group). Methods : A retrospective review was performed on 28 patients (D-group, n=17; F-group, n=11) with thoracic myelopathy due to OLF. The clinical parameters compared included scores of the Japanese Orthopedic Association (JOA), the Visual analogue scale of the back and leg (VAS-B and VAS-L), and the Korean version of the Oswestry disability index (K-ODI). Radiological parameters included the sagittal vertical axis (SVA), the pelvic tilt (PT), the sacral slope (SS), the thoracic kyphosis angle (TKA), the segmental kyphosis angle (SKA) at the operated level, and the lumbar lordosis angle (LLA; a negative value implying lordosis). These parameters were measured preoperatively, 1 year postoperatively, and 2 years postoperatively, and were compared with a linear mixed model. Results : After surgery, all clinical parameters were significantly improved in both groups, while VAS-L was more improved in the F-group than in the D-group (-3.4±2.5 vs. -1.3±2.2, p=0.008). Radiological outcomes were significantly different in terms of changes in TKA, SKA, and LLA. Changes in TKA, SKA, and LLA were 2.3°±4.7°, -0.1°±1.4°, and -1.3°±5.6° in the F-group, which were significantly lower than 6.8°±6.1°, 3.0°±2.8°, and 2.2°±5.3° in the D-group, respectively (p=0.013, p<0.0001, and p=0.037). Symptomatic recurrence of OLF occurred in one patient of the D-group at postoperative 24 months. Conclusion : Clinical improvement was achieved after decompression surgery for OLF regardless of whether instrumented fusion was added. However, adding instrumented fusion resulted in better outcomes in terms of lessening the progression of local and regional kyphosis and improving leg pain. Decompression with instrumented fusion may be a better surgical option for thoracic OLF.