Table 2.
DRD4 and DAT1 VNTR genotypes and allele frequencies between IGA and non-IGA groups
| Gene | Genotype | IGA (n = 116) |
Non-IGA (n = 114) |
χ21 | p1 | Allele type | IGA (n = 116) |
Non-IGA (n = 114) |
χ22 | p2 |
|---|---|---|---|---|---|---|---|---|---|---|
| n (%) | n (%) | n (%) | n (%) | |||||||
| DRD4 | l/l | 0 (0.0) | 0 (0.0) | 0.32 | .571 | l | 2 (0.9) | 1 (0.4) | 0.31 | .573 |
| l/s | 2 (1.7) | 1 (0.9) | s | 230 (99.1) | 227 (99.6) | |||||
| s/s | 114 (98.3) | 113 (99.1) | ||||||||
| DAT1 | 7/10 | 4 (3.4) | 5 (4.4) | 2.11 | .806 | 7-repeats | 4 (7.1) | 5 (2.2) | 1.05 | .787 |
| 9/10 | 7 (6.0) | 4 (3.5) | 9-repeats | 7 (3.0) | 4 (1.8) | |||||
| 10/10 | 102 (87.9) | 102 (89.4) | 10-repeats | 218 (94.0) | 215 (94.2) | |||||
| 10/11 | 3 (2.7) | 2 (1.8) | 11-repeats | 3 (1.3) | 4 (1.8) | |||||
| 11/11 | 0 (0.0) | 1 (0.9) |
VNTR variable number of tandem repeats, IGA Internet game addiction, non-IGA non-Internet game addiction; χ21, χ2 in comparison of genotype frequency between IGA and non-IGA; p1, p-value in comparison of genotype frequency between IGA and non-IGA; χ22, χ2 in comparison of allele frequency between IGA and non-IGA; p2, p-value in comparison of allele frequency between IGA and non-IGA; l, 48-base pair repeats ≥5; s, 48-base pair repeats <