Table 1.

Demographic and clinical characteristics of the participants (N=105)

Variables	Mean±SD, N (%)
Age, years	40.61±11.62
Female	49 (46.7)
Education, years	15.08±2.21
Subjective sleep reports
sTST, min	316.69±70.57
sSOL, min	57.45±41.60
ISI	14.47±4.23
PSQI	8.64±1.49
ESS	9.25±4.27
Polysomnographic sleep parameters
oTST, min	398.33±62.13
SE, %	83.18±13.35
oSOL, min	16.17±24.51
REM latency, min	119.43±69.45
N1, %	13.59±9.65
N2, %	63.54±9.17
N3, %	4.20±5.99
NREM, %	81.33±5.88
REM, %	18.67±5.88
WASO, min	64.62±57.67
Total arousal, N	118.85±68.87
AHI	7.26±11.91
Psychological measures
CES-D	12.47±9.59
BAI	9.78±8.31
GARS	23.94±12.25
SAPS	29.64±6.18
Sleep discrepancy
Mean ΔTST (sTST-oTST), min	-81.65±97.41
TST Misperception (ΔTST <-60)	65 (61.90)
No TST Misperception (-60≤ ΔTST ≤60)	33 (31.43)
Excluded (ΔTST >60)	7 (6.67)
Mean ΔSOL (sSOL-oSOL), min	41.28±45.01
SOL Misperception (ΔSOL >30)	55 (52.38)
No SOL Misperception (30≥ ΔSOL ≥-30)	49 (46.67)
Excluded (ΔSOL <-30)	1 (0.95)

TST, total sleep time; SOL, sleep onset latency; ISI, insomnia severity index; PSQI, pittsburgh sleep quality index; ESS, Epworth Sleepiness Scale; SE, sleep efficiency; WASO, wake after sleep onset; AHI, apnea-hypopnea index; CES-D, Center for Epidemiologic Studies Depression Scale; BAI, beck anxiety inventory; GARS, Global Assessment of Recent Stress Scale; SAPS, Smartphone Addiction Proneness Scale