Perception of Sleep Disturbances due to Bedtime Use of Blue Light-Emitting Devices and Its Impact on Habits and Sleep Quality among Young Medical Students
Table 2
The PSQI global score and by components (C1–C7) according to sleep disturbances perception as a consequence of bedtime use of blue light-emitting devices.
PSQI
All (N: 286)
Sleep disturbances perception as a consequence of bedtime use of blue light-emitting devices
Yes (N: 188)
No (N: 98)
PSQI global score >5
101 (35.3%).
76 (26.6%)
25 (8.7%)
0.005
PSQI mean score
5.62 ± 2.91
6.45 ± 3.3
5.41 ± 3.11
0.005
Component 1: subjective sleep quality
1.70 ± 0.98
1.89 ± 1.12
1.54 ± 0.62
0.01
Component 2: sleep latency
0.76 ± 0.89
0.75 ± 0.80
0.76 ± 0.69
0.2
Component 3: sleep duration
1.45 ± 0.84
1.67 ± 0.62
1.34 ± 0.79
0.01
Component 4: habitual sleep efficiency
0.72 ± 0.93
0.74 ± 0.98
0.67 ± 0.92
0.2
Component 5: sleep disturbances
0.94 ± 0.66
0.99 ± 0.64
0.91 ± 0.65
0.2
Component 6: use of sleeping medication
0.18 ± 0.33
0.15 ± 0.30
0.12 ± 0.36
0.6
Component 7: daytime dysfunction
0.66 ± 0.79
0.69 ± 0.85
0.68 ± 0.76
0.005
Sleep duration (hours)
6.52 ± 1.31
6.3 ± 1.25
7.21 ± 1.23
0.04
Sleep efficiency (%)
87.4 ± 13.3
87.7 ± 13.7
89.8 ± 12.6
0.1
Sleep latency (minutes)
17.5 (9.5, 26.2)
16.1 (11.6, 27.3)
19.2 (8.9, 24.6)
0.07
Quantitative values are expressed as means ± SD or median (interquartile lower, upper). Qualitative values are expressed as number (percentage of all students).
