|  | ADHD Composite Age 2 | ADHD Composite Age 3 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Gene | Marker | AT | AW | AT | AW | ||||||||
 |  | χ 2 | df | P | χ 2 | df | P | χ 2 | df | p | χ 2 | df | p |
DRD4 | Exon 3 VNTR | 4.74 | 3 | 0.19 | 3.26 | 3 | 0.35 | 7.82 | 3 | 0.05 | 8.69 | 3 | 0.03 |
DAT1 | 3'UTR VNTR | 7.00 | 2 | 0.03 | 5.09 | 2 | 0.08 | 11.15 | 2 | 0.004 | 12.17 | 2 | 0.002* |
 | Int8 VNTR | 3.42 | 2 | 0.18 | 2.84 | 2 | 0.24 | 2.90 | 2 | 0.24 | 3.21 | 2 | 0.20 |
 | rs11564750 | 0.06 | 1 | 0.80 | 0.75 | 1 | 0.39 | 0.14 | 1 | 0.43 | 0.01 | 1 | 0.94 |
 | rs2550946 | 0.43 | 1 | 0.51 | 0.71 | 1 | 0.40 | 0.16 | 1 | 0.47 | 0.99 | 1 | 0.32 |
SNAP25 | rs6039806 | 0.00 | 1 | 0.96 | 0.00 | 1 | 0.99 | 0.08 | 1 | 0.97 | 0.41 | 1 | 0.52 |
 | rs362987 | 0.04 | 1 | 0.84 | 0.07 | 1 | 0.79 | 0.04 | 1 | 0.91 | 0.39 | 1 | 0.39 |
 | rs3746544 | 0.05 | 1 | 0.83 | 0.18 | 1 | 0.67 | 1.75 | 1 | 0.21 | 1.98 | 1 | 0.16 |
 | rs1051312 | 0.63 | 1 | 0.43 | 0.04 | 1 | 0.85 | 0.00 | 1 | 0.58 | 0.65 | 1 | 0.42 |
5-HTT | rs11080121 | 2.16 | 1 | 0.14 | 2.71 | 1 | 0.10 | 0.12 | 1 | 0.23 | 4.77 | 1 | 0.03 |
 | rs140701 | 2.96 | 1 | 0.09 | 3.03 | 1 | 0.08 | 0.00 | 1 | 0.38 | 3.24 | 1 | 0.07 |
 | rs2020936 | 1.24 | 1 | 0.27 | 1.92 | 1 | 0.17 | 1.34 | 1 | 0.40 | 1.20 | 1 | 0.27 |
 | rs2066713 | 0.04 | 1 | 0.84 | 0.00 | 11 | 1.00 | 1.27 | 1 | 0.50 | 0.32 | 1 | 0.57 |
 | 5-HTTLPR | 0.31 | 1 | 0.57 | 0.03 | 1 | 0.87 | 0.03 | 1 | 0.87 | 0.91 | 1 | 0.34 |
MAOA | rs6323 | NT | NT | NT | 1.03 | 1 | 0.31 | NT | NT | NT | 0.97 | 1 | 0.83 |
 | Promoter VNTR | NT | NT | NT | 4.68 | 3 | 0.20 | NT | NT | NT | 0.05 | 3 | 0.81 |
NET1 | rs11568324 | 4.38 | 1 | 0.04 | NT | NT | NT | 0.58 | 1 | 0.13 | NT | NT | NT |
 | rs3785157 | 3.68 | 1 | 0.06 | 4.65 | 1 | 0.03 | 0.37 | 1 | 0.48 | 4.30 | 1 | 0.04 |
 | rs998424 | 3.30 | 1 | 0.07 | 4.42 | 1 | 0.04 | 0.83 | 1 | 0.59 | 3.22 | 1 | 0.07 |
 | rs2242447 | 1.23 | 1 | 0.27 | 1.03 | 1 | 0.31 | 3.56 | 1 | 0.18 | 2.01 | 1 | 0.16 |