Christensen S E, Elsass P, Vilstrup H
J Appl Toxicol. 1981 Oct;1(5):262-3. doi: 10.1002/jat.2550010505.
Number Connection Test (NCT) and Continuous Reaction Times (CRT) were determined in 94 hospitalized patients with no previous or actual cerebral dysfunction. By NCT, 47 patients used more than 30 s which is the upper normal limit. Of these, 5 used more than 50 s. Two patients exhibited a CRT exceeding the upper normal limit of 240 ms. Thus, accepting the upper limits quoted, one-half of the patients were falsely classified as encephalopathic by NCT, but only 2% by CRT. This indicates that the NCT is too unspecific to exclude encephalopathy and suggests that the CRT is a more valid measure in this respect.
对94名既往无脑部功能障碍且目前也无实际脑部功能障碍的住院患者进行了数字连接测试（NCT）和连续反应时间（CRT）测定。通过NCT测试，47名患者用时超过30秒，而30秒是正常上限。其中，5名患者用时超过50秒。两名患者的CRT超过了240毫秒的正常上限。因此，按照所引用的上限标准，通过NCT测试，有一半患者被错误地归类为脑病患者，但通过CRT测试，这一比例仅为2%。这表明NCT缺乏特异性，无法排除脑病，同时也表明在这方面CRT是一种更有效的测量方法。
