Lyons J A, Caddell J M, Pittman R L, Rawls R, Perrin S
Department of Veterans Affairs Medical Center, Jackson, Mississippi 39216.
J Trauma Stress. 1994 Jul;7(3):441-5. doi: 10.1007/BF02102788.
The Mississippi Scale for Combat-Related PTSD is widely used in the assessment of post-traumatic stress disorder (PTSD). The high face-validity of the scale may make it vulnerable to faking, however. The present study found that the scores of individuals instructed to respond "as if" they had PTSD did not differ from the scores of veterans with PTSD. Furthermore, although veterans who were diagnosed as having PTSD were found to have significantly higher Mississippi Scale scores than those who did not meet diagnostic criteria for PTSD, the mean score for all groups (veteran and non-veteran) exceeded the originally recommended diagnostic cut-off score of 107. A cutoff score of 121 was found to best differentiate veterans with PTSD from veterans who did not meet diagnostic criteria for the diagnosis, with high sensitivity but relatively low specificity.
密西西比战斗相关创伤后应激障碍量表广泛应用于创伤后应激障碍（PTSD）的评估。然而，该量表较高的表面效度可能使其容易受到伪装的影响。本研究发现，被指示“假装”患有PTSD的个体的得分与患有PTSD的退伍军人的得分没有差异。此外，虽然被诊断患有PTSD的退伍军人的密西西比量表得分显著高于未达到PTSD诊断标准的退伍军人，但所有组（退伍军人和非退伍军人）的平均得分都超过了最初推荐的诊断临界值107。结果发现，临界值为121时，最能区分患有PTSD的退伍军人和未达到诊断标准的退伍军人，敏感性高但特异性相对较低。
