Table 2.

Sleep indices of the study participants

Variable	Value (N=127)
Time variables
Bedtime (pm)	10:48±1:36
Sleep onset time (am)	12:04±2:12
Wake-up time (am)	6:59±1:33
Duration variables
Sleep onset latency (min)	78.5±69.0
Time in bed (h)	8.2±1.6
Duration from wake-up time to bedtime (h)	15.8±1.6
Time in bed during 24 h (h)	8.9±2.5
DBST
Desired time in bed (h)	7.2±1.0
Desired total sleep time (h)	6.6±1.1
Discrepancy between dTIB and dTST (DBST index)	0.6±0.9 (-1.0–4.0)

Values are presented as mean±standard deviation or mean±standard deviation (range). DBST, discrepancy between the desired time in bed and the desired total sleep time; dTIB, desired time in bed; dTST, desired total sleep time