METHODS: We examined the registry data of patients with OPLL who held a certificate of medical subsidy from the Japanese Ministry of Health, Labor and Welfare. The study period was from January 1, 2011 to December 31, 2012.
RESULTS: Registry data revealed that the incidence and the period prevalence of symptomatic OPLL were 0.005% (5 per 100,000 population) and 0.027% (27 per 100,000 population), respectively. OPLL occurred twice as often in men as in women. The peak age for onset of symptoms was 60-69 years. The mean Japanese Orthopedic Association (JOA) score was 9 points. Ninety percent of OPLL patients underwent surgery, and 90% of these surgeries were performed with a posterior approach. The most common indication for surgery was a JOA score of 11 points.
CONCLUSIONS: According to registry data, the prevalence of symptomatic OPLL was less than one-hundredth of that of radiographically detected OPLL. This indicates that most cases of radiographically detectable OPLL may be asymptomatic.
方法:我们检查了持有日本卫生部医疗补助证明的OPLL患者的注册数据,劳动与福利。研究期间为2011年1月1日至2012年12月31日。
结果:注册数据显示,有症状的OPLL的发病率和经期患病率分别为0.005%(5/100,000人口)和0.027%(27/100,000人口)。分别。OPLL在男性中的发生率是女性的两倍。症状发作的高峰年龄为60-69岁。日本骨科协会(JOA)平均得分为9分。90%的OPLL患者接受了手术,这些手术中有90%采用后路手术。最常见的手术指征是JOA得分为11分。
结论:根据注册表数据,有症状的OPLL的患病率低于影像学检查检测到的OPLL的百分之一.这表明大多数射线照相可检测的OPLL病例可能无症状。