The purpose of this study was to evaluate the effect of minor stressor to the patients with the psychiatric disorders[depressive disorder(major depressive disorder and dysthymic disorder), anxiety disorders according to the criteria of DSM-IV] and control group(N = 40). M inor stressor was measured by the Daily stress inventory(DSI) and major life event stress was measured by the M ajor life event stress inventory. The severity of anxiety and depression were measured by the Beck Depression Inventory(BDI), State-Trait Anxiety Inventory(STAI). The one week DSI impact/event ratio (I/E ratio ； the index of vulnerability to stressful events) score was not affected by the demographic factors. There was no significant difference on DSI scores(event, impact, impact/event ratio) in minor stressor between the depressive disorder, anxiety disorder and control group, but the anxiety group had the highest D SI scores. The one week DSI scores were not correlated with the score o f major life event stress, but positively correlated with the score of BDI, STAI(p〈.001) in patient group. And the scores of BDI, STAI were positively more correlated with DSI score than the stress of major life events. The authors concluded that the minor life events as well as the major life event were closely associated with the anxiety and depressive symptoms of patient group. So the DSI seems to be very effective tool to evaluate the minor life event stress. Using a stable baseline of at least 1 week and recording DSI scores throughout treatment would provide a potentially useful measure of the course and impact of various interventions, such as medication effects, stress management gainsand response to biofeedback.
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