携帯型1チャンネル脳波計の性能検証

Objectives:The aim of this study was to validate the accuracy of a newly developed shigle-channnel electroencephalogram and sleep staging by signals obtained from device by comparing the sleep scoring results to those of simultaneously recorded full polysomnography.Methods:Sleep stages were scored using the American Academy of Sleep Medicine Manual for Scoring Sleep 2007. The participants (age, 52.4 ± 11.9 years; five women, 53 men) were Japanese clinic outpatients with an apnea-hypopnea index ≤ 5.Results:The average percent agreement and kappa coefficient of sleep stages between single-channel electroencephalogram and polysomnography were 86.9% ± 4.42 and 0.75 ± 0.081, respectively. In epoch-by-epoch analysis, the kappa coefficients showed strong agreement for stage R, stage W, and stage N1 + N2 (0.80, 0.77, and 0.74, respectively) but weak agreement for staeg N3 (0.25).Conclusions:This single-channel electroencephalogram facilitates unattended sleep monitoring with and results that acceptably agree with those of polysomnography. This feature may meet the needs of large epidemiological and interventional studies.新しく開発した脳波計の精度を調べ、同時に記録した睡眠ポリグラフの結果と比較し、本装置から得られたシグナルによる睡眠の段階の評価が正しいか検証した。睡眠の段階はAmerican Academy of Sleep Medicine Manual for Scoring Sleep 2007に従ってスコア化した。被験者(男53名、女5名、平均52.4±11.9歳)は、無呼吸低呼吸指数が5以下の日本人外来患者であった。1チャンネル脳波計と睡眠ポリグラフ検査の平均パーセント一致率とκ係数は、86.9±4.42%と0.75±0.081であった。時期単位での解析では、κ係数はR期、W期、N1+N2期(0.80、0.77、0.74)では強く一致したが、N3期(0.25)ではあまり一致しなかった。この1チャンネル脳波計は無人で睡眠を監視することができ、その結果は睡眠ポリグラフとほぼ一致することが示された