- 1)Time in bed (TIB), minutes from time when subjects laid down on the bed and lights went off to wake up time; 2)TST(total sleep time),total minutes of sleep during time in bed; 3)Wake, total minutes of wakefulness during time in bed; 4)WASO(Wake after sleep onset), minutes scored as wakefulness from sleep onset to wake up time; 5)SEI(sleep efficiency index), SEI=Total sleep time/time in bed; 6)Mean activity, the total activity counts measured from actigraph/time in bed (min); 7)Wake episode, total number of wake episodes; 8)Mean wake episode, wakefulness/total number of wake episode; 9)Longest wake episode, longest wake episode during time in bed. a)a significant difference (P,0.05) between BC; b)a significant difference between C; c)a significant difference between A1
