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Table 2 Polymorphisms of the CYP enzymes CYP2C9, CYP2C19 and CYP2D6 (n = 51)

From: Relationship between cytochrome P450 polymorphisms and prescribed medication in elderly haemodialysis patients

Enzyme

Enzyme activity

Genotype

Number (%)

95 % CI,  %

CYP2C9

Normal

*1/*1

37 (73)

58–84

Intermediate

*1/*2, *1/*3

10 (20)

11–35

Poor

*2/*2, *2/*3,*3/*3

4 (8)

1–16

CYP2C19

Normal

*1/*1

20 (39)

26–54

Approximately normal

*1/*17, *2/*17

18 (35)

22–50

Intermediate

*1/*2,*1/*3

10 (20)

9–33

Poor

*2/*2

2 (4)

0–13

Increased

*17/*17

1 (2)

0–10

CYP2D6

Normal

*1/*1

13 (26)

14–40

Approximately normal

*1/*9, *1/*41

10 (20)

10–33

Intermediate

*1/*3, *1/*4, *1/*5, *1/*6, *9/*9, *10/*10, *10/*41, *4/*41

24 (47)

33–62

Poor

*3/*4, *4/*4, *4/*5, *5/*6

4 (8)

2–19

  1. 95 % CI = 95 % confidence interval