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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

 

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