From: Relationship among methadone dose, polymorphisms of dopamine D2 receptor and tri-dimensional personality questionnaire in heroin-addicted patients
Methadone ≥60 mg/day
Methadone <60 mg/day
Odds ratio
95Â % CI
p value
Borderline index
 ≤10
38
18
2.64
1.03–6.78
0.04
 11–20
30
25
1.50
0.59–3.79
0.39
 ≥21
12
15
1.0