健常者に対する10秒テストの疫学調査―圧迫性頚髄症患者との比較

Epidemiologic Investigation of the Grip-and-release Test (10-Second Test) in Healthy Volunteers. Comparison with Patients with Compression Cervical Myelopathy

　1,168人の一般住民を対象に疫学調査を行い，加齢に伴う10秒テストの正常値の推移と，年代別カットオフ値を求めた．さらに，左右差の意義とテスト手技自体の再現性についても検討した．その結果，加齢に伴い10秒テストの実施可能回数は低下していた．年代別のカットオフ値は，30歳代では24回，40歳代では23回，50歳代では21回，60歳代では17回，70歳代では16回，80歳代では15回であった．左右差のカットオフ値は2.1回であり，頚髄症患者では約40％の症例に左右差が存在していた．10秒テストは，健常者と頚髄症患者に対して十分な再現性を有していた．

　An epidemiologic investigation of the grip-and-release test was performed in 1,168 healthy volunteers. Age-related shifts in the normal range and the cutoff score were determined accoding to age group. Left-right differences in the test data and the repeatability of the test method were assessed. The results showed that the normal values decreased with age. The cutoff score was 24 cycles in the 4th decade, 23 in the 5th decade, 21 in the 6th decade, 17 in the 7th decade, 16 in the 8th decade and, 15 in the 9th decade. The cutoff score for left-right difference was 2 cycles. A left-right difference was found in about 40％ of the cervical myelopathy patients. The method had sufficient repeatability when used to test both cervical myelopathy patients and healthy volunteers.