说明：  The Bland–Altman analysis for repeated measures on 10-minute time windows in the awake state (around 7 PM) and during sleep (around 12 AM) was used to compare OHR and HRECG [6]. The Mann–Whitney U-test was used to compare the average HRECG and OHR of all patients in a 10-minute window in both activity states. All signal preprocessing and statistical analyses were performed with MATLAB 2011a [7]. The studywas approved by the local research ethics committee of the Academic Centre for Epileptology Kempenhaeghe.