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Table 3 Association of genotypes with symptoms of IGD in male

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

  A1+ (n = 73) A1− (n = 42) T+ (n = 16) T− (n = 99) Del+ (n = 35) Del− (n = 79)
G1 20 (27.4%) 12 (28.6%) 4 (25.0%) 28 (28.3%) 8 (22.9%) 24 (30.4%)
χ 2 = .018, p = .892 χ 2 = .074, p = .786 χ 2 = .680, p = .410
G2 16 (21.9%) 12 (28.6%) 3 (18.8%) 25 (25.3%) 6 (21.4%) 22 (27.8%)
χ 2 = .641, p = .423 χ 2 = .316, p = .574 χ 2 = 1.500, p = .221
G3 22 (30.1%) 14 (33.3%) 3 (18.8%) 33 (33.3%) 8 (22.9%) 28 (35.4%)
χ 2 = .127, p = .722 χ 2 = 1.362, p = .243 χ 2 = 1.778, p = .182
G4 27 (37.0%) 18 (42.9%) 7 (43.8%) 38 (37.4%) 11 (31.4%) 34 (43.0%)
χ 2 = .386, p = .535 χ 2 = .167, p = .683 χ 2 = 1.368, p = .242
G5 24 (32.9%) 19 (45.2%) 7 (43.8%) 36 (36.4%) 10 (28.6%) 33 (41.8%)
χ 2 = 1.740, p = .187 χ 2 = .321, p = .571 χ 2 = 1.779, p = .180
G6 21 (28.8%) 13 (31.0%) 5 (31.3%) 29 (29.3%) 6 (17.1%) 28 (35.4%)
χ 2 = .061, p = .805 χ 2 = .025, p = .874 χ 2 = 3.881, p = .049*
G7 27 (37.0%) 18 (42.9%) 5 (31.3%) 40 (40.4%) 11 (31.4%) 34 (43.0%)
χ 2 = .386, p = .535 χ 2 = .485, p = .486 χ 2 = .368, p = .242
G8 20 (27.4%) 15 (35.7%) 5 (31.3%) 30 (30.3%) 6 (17.1%) 29 (36.7%)
χ 2 = .871, p = .351 χ 2 = .006, p = .939 χ 2 = 4.364, p = .037*
G9 14 (19.2%) 10 (23.8%) 2 (12.5%) 22 (22.2%) 4 (11.4%) 20 (25.3%)
χ 2 = .346, p = .556 χ 2 = .788, p = .375 χ 2 = 2.815, p = .093
  1. G1–G9 represented DSM-5 IGD criteria (Additional file 2)
  2. p < .05