Table 3 Plasma levels and C/D of RIS, 9-OH-RIS, active moiety, and RIS/9-OH-RIS ratio among CYP2D6 activity scores groups (n = 199).

From: Relationship between CYP2D6 genotype, activity score and phenotype in a pediatric Thai population treated with risperidone

AS

n (%)

RIS (ng/ml)

9-OH-RIS (ng/ml)

Active moiety (ng/ml)

Ratio of RIS/9-OH-RIS

C/D of RIS (ng/ml/mg)

C/D of 9-OH-RIS (ng/ml/mg)

C/D of active moiety (ng/ml/mg)

AS = 0

1 (0.50)

2.67

1.78

4.45

1.50

10.68

7.12

17.80

AS = 0.25

17 (8.54)

1.43 (0.68–4.20)a

5.11 (3.86–13.56)

8.17 (4.53–22.95)

0.35 (0.17–0.82)a

1.45 (0.82–4.77)a

5.50 (3.86–8.00)d

9.01 (5.47–16.34)

AS = 0.5

55 (27.64)

1.10 (0.35–2.54)a

5.32 (3.11–11.40)

6.11 (4.54–11.96)

0.19 (0.06–0.35)a

1.48 (0.34–2.73)a

8.13 (5.42–11.93)

10.23 (6.32–14.39)

AS = 0.75

15 (7.54)

1.61 (0.92–2.58)a

5.13 (3.78–7.45)

7.25 (5.28–9.76)

0.26 (0.19–0.35)a

2.24 (1.52–3.71)a

10.15 (6.33–16.00)

11.68 (7.83–19.87)

AS = 1.0

17 (8.54)

0.44 (0.05–1.20)

7.56 (2.71–11.63)

7.56 (2.79–12.83)

0.05 (0.02–0.11)

0.27 (0.19–2.40)

10.90 (6.68–21.40)

11.79 (6.81–21.48)

AS = 1.25

70 (35.18)

0.33 (0.05–0.74)

7.27 (4.30–11.23)

7.60 (4.31–12.78)

0.04 (0.02–0.08)

0.36 (0.15–0.99)

9.18 (6.74–14.13)

9.72 (6.74–15.05)

AS = 1.5

9 (4.52)

0.13 (0.05–0.49)

2.28 (1.44–9.75)

4.19 (1.44–9.88)

0.05 (0.04–0.07)

0.40 (0.10–0.61)

6.74 (2.88–8.45)

8.38 (2.88–9.06)

AS = 2.0

15 (7.54)

0.05 (0.02–0.27)

8.36 (6.36–12.87)

8.36 (6.71–13.61)

0.01 (0.00–0.03)

0.05 (0.03–0.49)

7.95 (5.28–19.45)

8.08 (5.33–21.13)

  1. aStatistically significant result (P < 0.05) from AS = 1.0, 1.25, 1.5, and 2.0.
  2. Values expressed as median (interquartile range).
  3. AS activity score (assigned per revised CPIC recommendations), C/D dose-corrected concentration, RIS Risperidone, 9-OH-RIS 9-hydroxy-risperidone, Active moiety, the sum of risperidone plus 9-OH-RIS.