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 1
Blue-light-device bedtime habits and symptoms that may appear upon awakening due to impaired sleep according to perception of sleep disturbances as a consequence.
Sleep disturbances perception as a consequence of bedtime use of blue light-emitting devices
Yes (N: 188)
No (N: 98)
Lights of bedroom switched off
154 (53.8%)
66 (23.1%)
0.02
Automatic or manual brightness adjustment activated
139 (48.6%)
62 (21.7)
0.3
Smartphones or tablets are not switched off before sleep
161 (56.3%)
88 (30.8%)
0.1
Smartphones or tablets put under pillow while sleep
34 (11.9%)
14 (4.9%)
0.04
Interruption of sleep to check messages
114 (39.9%)
33 (11.5%)
<0.001
Fatigue on waking > 1 time per week
119 (41.6%)
50 (17.5%)
0.04
Headaches > 1 time per week
50 (17.5%)
22 (7.7%)
0.08
Irritability > 1 time per week
72 (25.2%)
31 (10.8%)
0.4
Results are expressed as number (percentage of all students).
