Best W R, Becktel J M, Singleton J W
Gastroenterology. 1979 Oct;77(4 Pt 2):843-6.
A previous paper reported derivation of the Crohn's Disease Activity Index (CDAI) from data on 112 patients. We have now rederived the values of the eight coefficients of the CDAI using data from 1058 visits of patients enrolled in the National Cooperative Crohn's Disease Study and the Trial of Adjunctive Sulfasalazine in Crohn's Disease. The rederived coefficients are similar to the original ones. New and original index values calculated on the same data from patient visits correlated very highly. Because there is so little difference between the original and the rederived versions, continued use of the original version is suggested in order to maintain comparability of new studies employing this tool with those previously accomplished.
先前有一篇论文报道了根据112名患者的数据推导得出克罗恩病活动指数（CDAI）。我们现在使用参与全国性克罗恩病合作研究及克罗恩病辅助性柳氮磺胺吡啶试验的患者1058次就诊数据，重新推导了CDAI八个系数的值。重新推导的系数与原始系数相似。根据患者就诊的相同数据计算得出的新旧指数值相关性非常高。由于原始版本和重新推导版本之间差异极小，因此建议继续使用原始版本，以便使用该工具的新研究与之前完成的研究保持可比性。
