Study on Posttraumatic Stress Disorder after Kagoshima Northwest Earthquake and Avalanche of Earth and Rocks Disaster in Izumi Harihara District

研究鹿儿岛西北地震和泉市土石崩塌后创伤后应激障碍（PTSD）的特点和免疫功能。根据DSM-IV问卷，10.2%的小学、初中和高中学生患有PTSD。疾病的发病率随着时间的流逝而逐渐下降。成年人的比例高于学生。雪崩发生2年后，PTSD的发病率仍然很高（约20%）。通过CD4、CD8、CD56和NKCC检测16例患者的细胞免疫功能。3例患者NKCC较低（<正常对照-2SD），比对照组高7.5倍。CD4、CD8、CD56水平升高，且CD8、CD56水平与焦虑程度呈正相关。然而，较低的NKCC和较高的CD4、CD8和CD56与PTSD的发生无关。NKCC随时间的增加而增加。相比之下，其他参数下降。当咨询师解释他们的免疫功能时，受试者第一次向咨询师讲述了他们被压抑的经历。包括免疫功能在内的身体检查可能对那些意外遭遇灾难的受试者提供有用的咨询。

We investigated characteristic of posttraumatic stress disorder (PTSD) and immunological function after the Kagoshima Northwestern Earthquake and the avalanche of earth and rocks in Izumi city. Students of 10.2% in elementary, junior and senior high schools were suffered from PTSD according to the DSM-IV questionnaire. The rate of the disease gradually decreased with elapsed time. The rate in adults was higher than in the students. The incidence rate of PTSD remained high (about 20%) 2 years after the avalanche.Sixteen subjects were examined for cellular immunological function by measuring CD4, CD8, CD56, and NKCC. The lower NKCC (<-2SD of normal controls) was observed in three subjects, higher than controls by 7.5 times. The higher level of CD4, CD8, and CD56 were observed, and the levels of CD8 and CD56 were positively associated with the degree of anxiety. However, the lower NKCC and higher CD4, CD8, and CD56 did not correlate with the occurrence of PTSD. The NKCC increased with elapsed time in the three subjects. In contrast, the other parameters decreased. Subjects for the first time talked their suppressed experiences to the counsellor when they were explained about their immunological function. Physical examination including immuological function may be useful for counselling of subjects who unpredictably encountered the disaster.