Table 5.
Sleep parameters in adolescents aged 12–14 with Internet game addiction (IGA) verified with Game Addiction Scale for Adolescents (GASA).
| Sleep Parameters | Age 12–14 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Boys (n = 1010) | Girls (n = 1217) | |||||||||
| No IGA n = 833 |
IGA n = 177 |
p | d | U | No IGA n = 1130 |
IGA n = 87 |
p | d | U | |
| Bedtime weekdays (in hours) |
23 (22–23) |
23 (23–24) |
<0.001 | 0.332 | 55,363 | 23 (22–24) |
23 (23–24) |
0.020 | 0.133 | 41,849 |
| Waking up weekdays (in hours) |
7 (7–8) |
8 (7–9) |
<0.001 | 0.262 | 58,691 | 7 (6–8) |
7 (6–9) |
0.120 | 0.089 | 44,359 |
| Total sleep weekdays (in hours) |
8.4 (7.6–9.4) |
8.3 (7.3–9.3) |
0.190 | 0.083 | 68,104 | 8.2 (7.2–9.1) |
7.9 (6.5–9.3) |
0.461 | 0.042 | 46,784 |
| Sleep onset latency (in minutes) |
10 (7–20) |
15 (10–30) |
0.013 | 0.164 | 54,968 | 15 (10–25) |
20 (13.5–30) |
<0.001 | 0.222 | 31,964 |
| Frequency of night awakenings (in points) |
0 (0–1) |
1 (0–2) |
0.015 | 0.175 | 63,659 | 1 (0–2) |
1 (0–2) |
0.350 | 0.051 | 43,895 |
| PDSS score (in points) |
9 (6–13) |
13 (10–17) |
<0.001 | 0.561 | 44,680 | 12 (8–16) |
16 (13–19) |
<0.001 | 0.340 | 30,834 |
Note: Time is expressed in 24–hour clock time. AIU—adaptive Internet use; MIU—maladaptive Internet use; IA—Internet addiction. Data are presented as medians (25–75% quartiles). The Mann–Whitney U test was used. d—effect size (Cohen’s d) for Mann–Whitney U test calculated according to recommendations Fritz, Morris & Richler [45] with the public domain software https://www.psychometrica.de/effect_size.html (accessed on 2 October 2021).