研究人员报告说，有三分之一的40-59岁的人有中度至重度退行性椎间盘疾病的影像学证据，半数以上有中度至重度脊椎骨关节炎。

One third of people aged 40-59 have evidence of degenerative disc disease

https://www.sciencedaily.com/releases/2018/05/180517163317.htm

1. Mohamed Jarraya, Ali Guermazi, Amanda L. Lorbergs, Elana Brochin, Douglas P. Kiel, Mary L. Bouxsein, L. Adrienne Cupples, Elizabeth J. Samelson. A longitudinal study of disc height narrowing and facet joint osteoarthritis at the thoracic and lumbar spine, evaluated by computed tomography: the Framingham Study. The Spine Journal, 2018; DOI: 10.1016/j.spinee.2018.04.010