Department of Public Health, Miguel Hernandez University of Elche, Alicante, Spain
CIBER en Epidemiología y Salud Pública, Alicante, Spain.
BMJ Open. 2019 Sep 18;9(9):e030905. doi: 10.1136/bmjopen-2019-030905.
To calculate each patient's cumulative radiation exposure and the recurrent tests during a 12-year study period, according to sex and age, in routine practice.
Retrospective cohort study.
A general hospital with a catchment population of 224 751 people, in the Southeast of Spain.
Population belonged to the catchment area of that hospital in 2007. We collected all consecutive diagnostic imaging tests undergone by this population until 31 December 2018. We excluded: imaging tests that did not involve radiation exposure.
The cumulative effective dose and the recurrent imaging tests by sex and age at entry of study.
Of the 224 751 people, 154 520 (68.8%) underwent an imaging test. The population had 1 335 752 imaging tests during the period of study: 1 110 077 (83.0%) plain radiography; 156 848 (11.8%) CT; 63 157 (4.8%) fluoroscopy and 5670 (0.4%) interventional radiography. 25.4% of the patients who had a CT, underwent five or more CTs (5.4% in the 0-20 years age group). The median total cumulative effective dose was 2.10 mSv (maximum 3980.30) and 16.30 mSv (maximum 1419.30 mSv) if we considered only doses associated with CT. Women received more effective dose than men (median 2.38 vs median 1.90, p<0.001). A total of 7142 (4.6%) patients received more than 50 mSv, with differences in men and women (p<0.001) and 2.5% of the patients in the 0-20 years age group, if we considered only doses associated with CT.
Nearly 5% of patients received doses higher than 50 mSv during the 12-year period of study and 2.5% of the patients in the 0-20 years age group, if we considered only doses associated with CT. The rate of recurrent examinations was high, especially in older patients, but also relevant in the 0-20 years age group.
根据性别和年龄，计算 12 年研究期间常规实践中每位患者的累积辐射暴露和重复检查情况。
回顾性队列研究。
西班牙东南部一家拥有 224751 名居民的综合医院。
2007 年该医院服务人群。我们收集了该人群在 2018 年 12 月 31 日前接受的所有连续诊断影像学检查。排除：不涉及辐射暴露的影像学检查。
按入组时的性别和年龄计算累积有效剂量和重复影像学检查。
在 224751 人中，有 154520 人（68.8%）接受了影像学检查。该人群在研究期间共进行了 1335752 次影像学检查：1110077 次（83.0%）普通 X 线摄影；156848 次（11.8%）CT；63157 次（4.8%）透视和 5670 次（0.4%）介入放射学。25.4%的 CT 患者接受了 5 次或更多次 CT（0-20 岁年龄组为 5.4%）。总累积有效剂量中位数为 2.10 mSv（最大值 3980.30），如果仅考虑与 CT 相关的剂量，则为 16.30 mSv（最大值 1419.30 mSv）。女性接受的有效剂量高于男性（中位数 2.38 比中位数 1.90，p<0.001）。共有 7142 名（4.6%）患者接受了 50 mSv 以上的剂量，男女之间存在差异（p<0.001），如果仅考虑与 CT 相关的剂量，则 0-20 岁年龄组中有 2.5%的患者。
在 12 年的研究期间，近 5%的患者接受了 50 mSv 以上的剂量，如果仅考虑与 CT 相关的剂量，则 0-20 岁年龄组中有 2.5%的患者。重复检查的比例很高，尤其是老年患者，但在 0-20 岁年龄组也很重要。
