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. 2023 Oct 25;23:781. doi: 10.1186/s12888-023-05292-9

Table 4.

Gene-gene Interaction analysis for 2 and 3 locus models by using logistic regression

polymorphism1 polymorphism2 OR (95%CI) P value Genotype combination Respond-ers
(N = 51)
Resist-ants
(N = 50)

DRD4 120-bp duplication

240/240

COMT rs4680

Val/Val

3.232(1.056–9.892) 0.040

240/240 and

Val/Val

5 13

DRD2 A-241G

AA

COMT rs4680

Val/Met-Met/Met

2.540(1.138–5.668) 0.023

AA

and

Val/Met-Met/Met

30 18

DRD2 A-241G

AA

DRD4 120-bp duplication

120/240 − 120/120

3.000(1.279–7.035) 0.012

AA

And

120/240 − 120/120

38 26
polymorphism1 SNP2 SNP3 OR (95%CI) P value Genotype combination

Respond-ers

(N = 51) a

Resist-ants

(N = 50) b

DRD4 120-bp duplication

120/240 − 120/120

DRD2 A241G

AA

COMT rs4680

Val/Met-Met/Met

2.363(1.057–5.281) 0.036 AA and 120/240 − 120/120 and Val/Met-Met/Met 28 17

Notes: †: treatment responder group, ‡: treatment resistant group