人間ドックにおける認知症早期スクリーニング検査の試み ーかなひろいテストとCT計測値の有効性の検討ー

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  • Screening for the Early Stages of Dementia in Ningen Dock -Evaluation of Effectiveness of Kana-picking Test and CT Linear Measurements-
  • ニンゲン ドック ニ オケル ニンチショウ ソウキ スクリーニング ケンサ ノ ココロミ : カナ ヒロイ テスト ト CT ケイソクチ ノ ユウコウセイ ノ ケントウ

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Objective: Early detection of dementia is very important because patients can experience some recovery and improvement if they are treated in the early stages of the disease. The kana-picking test (Japanese character picking test) is considered to be useful for detecting preclinical dementia and it has been recently reported that Computed Tomography linear measurements are also effective. We examined whether these methods can be used as screening tests for the early stages of dementia in Ningen dock.<br>Methods: A total of 107 subjects undergoing routine health check-ups who selected “early screening tests for dementia”, an optional service provided by our Ningen Dock, from April 2010 to March 2011 were enrolled. After practicing for the kana-picking test, they underwent the test and their brain CT scans were evaluated by a radiologist. A series of CT linear measurements were also obtained from brain CT and we examined for a relationship between them and scores in the kana-picking test.<br>Results: A 70-year-old male subject scored less than borderline in the kana-picking test and the radiologist reported temporal lobe atrophy in this subject's brain CT. A strong correlation was noted between kana-picking test scores and CT linear measurements. <br>Conclusion: We confirmed that the kana-picking test is useful for detecting preclinical dementia in Ningen Dock because it allowed us to identify an asymptomatic subject with brain atrophy. The findings of our study suggest that CT linear measurements may help raise the effectiveness of screening for preclinical dementia.

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