Evaluation of occupational therapy : analysis of time-dependent changes in the Baum test Hiroyuki Inadomi 1 , Kiichiro Morita 2 , Kouji Haramura 1 , Hideaki Kurata 1 , Naoki Kawamura 2 1Nakamura hospital 2Department of Neuropsychiatry, Kurume University school of Medicine Keyword: 経時的評価 , バウムテスト , 精神分裂病 , evaluation of OT , Baum test , schizophrenia pp.351-357
Published Date 1996/8/15
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 It is well known that the Baum test is easy to perform, causes little stress in the subject, and projects the subject's mental interpretation. The present study was performed to evaluate occupational therapy by using the Baum test. Occupational therapy (OT) was performed in an OT room for 2 years involving 23 patients with schizophrenia (7 : male and 16 : female) ; OT included several occupational tasks-for example, cooking, sports, and industrial arts. OT was evaluated by the rate of attendance at OT. The Baum test was also carried out for 2 years at intervals of about 1 month. Informed consent was obtained for each test from all subjects. The subjects were instructed to "Draw carefully one tree which grows fruits" as in the basic Koch method. To perform the Baum test, we measured several indices such as the growth index, tree-factor index (branch, leaf and fruit), and distortion indices (mebius and top -width of trunk). The growth indices involved the ratio of the tree-crown height to the tree-height. The branch index was calculated by counting the numbers of single-lined and double-lined branches coming only from the trunk. The polite index involved the number of leaves with veins. The distortion index was evaluated by the mebius and the ratio of the top-width of the trunk to its bottom width.

 The rate of attendance from OT's beginning progressively increased. After six months, the rate grew to about 65% and, after one year, grew to about 85%, and was sustained for over 2 years. The growth index of the Baum test significantly decreased six months after the start of OT but progressively incresased for 2 years thereafter. There was a significant difference between the pre-OT value and those at one and a half years, and 2 years after the start of OT. There was no significant difference in the growth index between healthy subjects and schizophrenic patients (after 2 years of OT). There was no significant difference in the tree factors between schizophrenic patients (after 2 years of OT) and healthy subjects. In detail, the number of double lined branches increased significantly with time after the start of OT, but the number of single lined branches did not. The distortion indices decreased significantly with the duration of OT. To evaluate the learning (repetition) effect of the Baum test, the duration of OT and several indices were calculated. There were statistically significant differences between the correlation coefficients of repetition and those of OT duration.

 These results, which time, strongly indicated significant improvements in several indices of the Baum test. The correlations between several indices and the duration of OT were higher than those between some other indices and the repetition of the test, indicating that the present changes in the Baum indices may be mostly due to the efficiency of OT. In consideration of these results, we concluded that the Baum test may be a useful tool and that this method should be used for additional evaluation of OT. We hypothesize that the Baum test may be useful for over all judgment of the efficiency of OT for improving schizophrenia.

Copyright © 1996, Japanese Association of Occupational Therapists. All rights reserved.


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