Table 1.
General characteristics of the study subjects.
| Discovery | Validation | Combined | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Control | IGD | P-value | Control | IGD | P-value | Control | IGD | P-value | |
| N | 26 | 25 | 16 | 20 | 42 | 45 | |||
| Age (years) | |||||||||
| Median (min–max) | 13 (12–17) | 13 (12–15) | 0.759 | 15 (13–18) | 14.5 (12–18) | 0.628 | 14 (12–18) | 14 (12–18) | 0.509 |
| Weekly Internet gaming hours (h) | |||||||||
| Median (min–max) | 5.25 (2–17) | 18 (6–46) | 1.27E−6a | 5.5 (2–23) | 8 (1–112) | 0.374 | 5.5 (2–23) | 14 (1–112) | 1.63E−5a |
| Monthly household income (million KRW) | |||||||||
| Median (min–max) | 5 (1–9) | 3 (1–9) | 0.588 | 4 (4–4) | 2 (2–2) | 1.000 | 5 (1–9) | 3 (1–9) | 0.460 |
| Education (years) | |||||||||
| Median (min–max) | 8 (7–9) | 8 (7–9) | 0.584 | 12 (12–12) | 6 (6–13) | 0.305 | 8 (7–12) | 8 (6–13) | 0.269 |
| K-WISC: block design | |||||||||
| Median (min–max) | 10.5 (4–17) | 10 (4–16) | 0.544 | 10 (3–16) | 12.5 (4–15) | 0.125 | 10 (3–17) | 11 (4–16) | 0.598 |
| K-WISC: vocabulary | |||||||||
| Median (min–max) | 9 (5–17) | 7 (5–13) | 0.174 | 9.5 (8–15) | 11.5 (5–15) | 0.595 | 9 (5–17) | 9 (5–15) | 0.527 |
| KS | |||||||||
| Median (min–max) | 24 (17–36) | 37 (22–51) | 3.81E−6a | 29 (17–34) | 59 (22–108) | 1.2E−5a | 25 (17–36) | 40 (22–108) | 2.05E−10a |
| BIS | |||||||||
| Median (min–max) | 63 (35–75) | 67.5 (45–81) | 0.080 | 61 (45–79) | 63 (32–82) | 0.835 | 62 (35–79) | 65 (32–82) | 0.240 |
| BAS | |||||||||
| Median (min–max) | 31 (15–40) | 31 (13–51) | 0.558 | 36.5 (22–48) | 34 (27–52) | 1.000 | 32 (15–48) | 34 (13–52) | 0.637 |
| BInS | |||||||||
| Median (min–max) | 18 (10–26) | 17.5 (13–27) | 0.642 | 18.5 (12–25) | 20 (13–21) | 0.138 | 18 (10–26) | 19 (13–27) | 0.302 |
IGD, Internet gaming disorder patients; KS, Korean Internet Addiction Proneness Scale; BIS, Barratt Impulsivity Scale; BAS, Behavioral Activation System; BInS, Behavioral Inhibition System; KRW, Korean Won.
aP < 0.05 (Mann–Whitney–Wilcoxon test).