Warren R A, Ferguson D G
Arch Emerg Med. 1984 Sep;1(3):143-50. doi: 10.1136/emj.1.3.143.
A prospective study was carried out to analyse all X-rays requested from the three accident and emergency departments in Sheffield during one week. There were 3253 patients examined, of which 1028 (31.6%) were X-rayed, 1251 sets of X-rays being performed. Few X-rays (4.5%) were requested for medico-legal reasons. Skull X-rays were studied in particular detail. Only 5 (4.5%) of 112 films were subsequently reported as abnormal by the radiologist. The accident and emergency doctor's ability to predict X-ray outcome was not very good, their false positive rate being high at 21% while their false negative rate was low at 5.5%. This indicates that the accident and emergency doctors tended to be over cautious to compensate for their lack of experience.
开展了一项前瞻性研究，以分析谢菲尔德三个急诊科在一周内要求进行的所有X光检查。共检查了3253名患者，其中1028人（31.6%）接受了X光检查，共进行了1251次X光检查。因法医学原因要求进行的X光检查很少（4.5%）。对颅骨X光片进行了特别详细的研究。112张X光片中只有5张（4.5%）随后被放射科医生报告为异常。急诊科医生预测X光检查结果的能力不是很好，其假阳性率高达21%，而假阴性率低至5.5%。这表明急诊科医生往往过于谨慎，以弥补他们经验的不足。
