From: Relationship among methadone dose, polymorphisms of dopamine D2 receptor and tri-dimensional personality questionnaire in heroin-addicted patients
Mean (SD)
Range
Age, year
39.3 (7.9)
21–57
Mean methadone dose, mg/day
56.8 (24.8)
3–140
Harm avoidance
15.2 (6.9)
0–31
Novelty seeking
18.1 (7.2)
0–34
Reward dependence
20.2 (6.3)
1–34
Borderline index
12.5 (8.2)