Table 3 P-value for the Individual SNPs and the Aggregation of Seven Variants

p-value for Additive effect

p-value for Additive effect

DRD2

rs1801028

C/C

C/G

G/G

C/C

C/G

G/G

0.275

390

14

8

354

23

7

DRD2

rs6277

C/C

C/T

T/T

C/C

C/T

T/T

0.362

367

38

1

341

43

2

GRIN2B

rs101938

T/T

T/G

G/G

T/T

T/G

G/G

0.67

91

206

110

81

204

100

TPH1

rs1800532

A/A

A/C

C/C

A/A

A/C

C/C

0.635

0.189

105

219

90

108

200

78

MTHFR

rs1801133

T/T

T/C

C/C

T/T

T/C

C/C

0.519

69

184

160

64

183

138

DTNBP1

rs2619528

G/G

G/A

A/A

G/G

G/A

A/A

0.193

326

77

4

323

60

1

DRD4

120bpTR

S/S

S/L

S/L

S/S

S/L

L/L

0.095

24

138

248

16

158

211