Gibson E S, Martin R H, Terry C W
J Occup Med. 1980 Aug;22(8):515-9. doi: 10.1097/00043764-198008000-00006.
The primary purpose of pre-placement back x-ray screening is to reduce the incidence of low back problems. This study was designed to address the specific question of whether or not this objective is achieved, without directly looking at the predictive value of radiological abnormalities of the lumbar spine. Two retrospective cohorts of steelworkers were identified: one group hired before, and one after, introduction of back x-rays into an otherwise identical pre-placement medical examination. The two cohorts were stratified by age and work activity, and by use of a modified life table method were followed for 12 years. All health incidents, modified work, lost time, or permanent job changes were noted. Analysis revealed no statistically significant differences between cohorts for the parameters studied. The inclusion of low back x-ray screening into a comprehensive pre-placement medical examination had no significant effect on the subsequent incidence of low back pain in the cohort of steelworkers studied.
入职前背部X光筛查的主要目的是降低腰部问题的发生率。本研究旨在解决是否实现了这一目标的具体问题，而不直接观察腰椎放射学异常的预测价值。确定了两组钢铁工人的回顾性队列：一组是在入职前进行X光检查引入之前雇佣的，另一组是在引入之后雇佣的，两组在其他方面接受相同的入职前医学检查。根据年龄、工作活动对两组进行分层，并采用改良寿命表法随访12年。记录所有健康事件、工作调整、误工或永久性工作变动情况。分析显示，所研究参数在两组之间无统计学显著差异。在本研究的钢铁工人队列中，将腰椎X光筛查纳入全面的入职前医学检查对随后腰痛的发生率没有显著影响。
