理解的对吗？

In a case-control study of juvenile disc herniation, the estimated risk of developing a herniated disc before the age of 21 was four to five times greater for patients who had a positive family history, as compared to those who did not [39]. Similarly, below 18 years old, the odds ratio of a patient with juvenile disc herniation to have a family history of disc surgery was 5.6 times that of a patient without disc herniation [40]. Clinicians should also consider risk factors for ankylosing spondylitis in this population. Symptoms of morning stiffness, improvement with exercise, alternating buttock pain, and awakening due to back pain during the second part of the night only should prompt immediate investigation [41].

在一项关于青少年椎间盘突出症的病例对照研究中，有椎间盘突出症家族史的患者21岁前椎间盘突出症的估计风险是没有家族史患者的4到5倍^[39]。同样，有椎间盘手术家族史的18岁以下的青少年患椎间盘突出症是无椎间盘突出症家族史的5.6倍^[40]。临床临床医生还应考虑这一人群中是强直性脊柱炎的高危人群。晨僵伴运动后改善、交替性臀部疼痛、半夜睡眠时因背部疼痛而醒来等症状应尽快行相应的检查^[41]。