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Table 2 Allele and genotype frequencies of ANKK1 and DRD2 polymorphisms

From: An association study of Taq1A ANKK1 and C957T and − 141C DRD2 polymorphisms in adults with internet gaming disorder: a pilot study

Genotype ANKK1 Taq 1A DRD2 C952T DRD2 − 141C Ins/Del
A1A1 A1A2 A2A2 TT TC CC Del/Del Del/Ins Ins/Ins
Whole
 Control (n = 87) 15 (17.2) 43 (48.3) 30 (34.5) 0 (0.0) 15 (17.2) 72 (82.8) 1 (1.2) 29 (33.7) 56 (65.1)
 IGD (n = 63) 12 (19.0) 26 (41.3) 25 (39.7) 0 (0.0) 6 (9.5) 57 (90.5) 2 (3.2) 17 (27.0) 44 (69.8)
  χ 2 = .731, p = .694 χ 2 = 1.808, p = .179 χ 2 = 1.386, p = .500
Male
 Control (n = 76) 14 (18.4) 35 (46.1) 27 (35.5) 0 (0.0) 12 (15.8) 64 (84.2) 1 (1.3) 26 (34.7) 48 (64.0)
 IGD (n = 39) 7 (17.9) 17 (43.6) 15 (38.5) 0 (0.0) 4 (10.3) 35 (89.7) 0 (0.0) 8 (20.5) 31 (79.52)
  χ 2 = .099, p = .952 χ 2 = .659, p = .417 χ 2 = 3.132, p = .209
Female
 Control (n = 11) 1 (9.1) 7 (63.6) 3 (27.3) 0 (0.0) 3 (27.3) 8 (72.7) 0 (0.0) 3 (27.3) 8 (72.7)
 IGD (n = 24) 5 (20.8) 9 (37.5) 10 (41.7) 0 (0.0) 2 (8.3) 22 (91.7) 2 (8.3) 9 (37.5) 13 (54.2)
  χ 2 = 2.155, p = .341 χ 2 = 2.210, p = .137 χ 2 = 1.580, p = .454
  1. IGD Internet gaming disorder
  ANKK1 Taq 1A DRD2 C952T DRD2 − 141C Ins/Del
Allele A1+ A1− T+ T− Del+ Del−
Whole
 Control (n = 87) 57 (65.5) 30 (34.1) 15 (17.2) 72 (82.8) 30 (34.5) 57 (65.5)
 IGD (n = 63) 38 (60.3) 25 (39.7) 6 (9.5) 57 (90.5) 19 (30.2) 44 (69.8)
  χ 2 = .425, p = 514 χ 2 = 1.808, p = .179 χ 2 = .368, p = .544
Male
 Control (n = 76) 49 (64.5) 27 (35.5) 10 (16.9) 49 (83.1) 27 (36.0) 48 (64.0)
 IGD (n = 39) 24 (61.5) 15 (38.5) 2 (5.6) 34 (94.4) 8 (20.5) 31 (79.5)
  χ 2 = .096, p = .757 χ 2 = .659, p = .417 χ 2 = .2.893, p = .089
Female
 Control (n = 11) 15 (51.7) 14 (48.3) 3 (27.3) 8 (72.7) 3 (27.3) 8 (72.7)
 IGD (n = 24) 15 (55.6) 12 (44.4) 2 (8.3) 22 (91.7) 11 (45.8) 13 (54.2)
  χ 2 = .669, p = .413 χ2 = 2.210, p = .137 χ 2 = 1.083, p = .298
  1. IGD Internet gaming disorder