Ishimoto Y, Yoshimura N, Muraki S, et al : Prevalence of symptomatic lumbar spinal stenosis and its association with physical performance in a population-based cohort in Japan: the Wakayama Spine Study. Osteoarthritis and Cartilage 2012;20:1103-1108
- Wakayama spine study
- 1009 men 335 women 674 volunteers
- A mobile MRI (Excelart 1.5T, Toshiba)
- A well experienced orthopedic surgeon diagnosed whole participants by history taking, physical exams and MRI
- The diagnostic criteria for symptomatic LSS used in the present study were based on the LSS definition from the North American Spine Society (NASS) guide line, which requires presentation of both LSS symptoms and radiographic signs of LSS.
- radiographic classification of LSS none/mild/moderate/severe
- Radiographic LSS also required the severity to be more than moderate and the radiographic finding needs to be consistent with the symptoms and outlined above.
- The percentage of participants with moderate or severe radiographic central stenosis was 76.5%, while the prevalence of symptomatic LSS was 9.3%
- in conclusion, the present study clarified that the prevalence of symptomatic LSS was about 10% in a cohort resembling the Japanese general population.