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Table 4 Pharmacological observations I % II

From: Genetic variation in the Catechol-O-Methyltransferase (COMT) gene and morphine requirements in cancer patients with pain

a – Pharmacological observations I.

Morphine dose and haplotype groups

Haplotype

Carriage

N

Morphine dose mg/24 h median [range]

P value

 

1

Yes

114

60 [10–660]

0.006 a

 
 

No

83

100 [20–760]

  

2

Yes

61

80 [20–410]

0.94

 
 

No

136

70 [10–760]

  

3

Yes

31

90 [20–420]

0.44

 
 

No

166

78 [10–760]

  

4

Yes

24

70 [20–420]

0.94

 
 

No

173

80 [10–760]

  

5

Yes

17

120 [20–760]

0.17

 
 

No

180

78 [10–660]

  

6

Yes

17

120 [30–200]

0.56

 
 

No

180

73 [10–760]

  

7

Yes

10

120 [40–290]

0.44

 
 

No

187

80 [10–760]

  

N = number of patients

a Mann-Whitney U test for independent samples.

b – Pharmacological observations II.

Serum concentration of morphine, M6G and M3G against haplotype groups

Haplotype

Carriage

N

Morphine (nmol/ml) median [range]

M6G (nmol/ml) median [range]

M3G (nmol/ml) median [range]

1

Yes

114

51 [2–350]

310 [10–2660]

1810 [120–16200]

 

No

83

59 [3–1070]

349 [20–4830]

2310 [110–21250]

2

Yes

61

50 [3–330]

346 [20–2482]

1890 [120–12390]

 

No

136

60 [2–1070]

319 [10–4830]

2040 [110–21250]

3

Yes

31

67 [5–320]

310 [29–1690]

2200 [197–7780]

 

No

166

50 [2–1070]

330 [10–4830]

1992 [110–21250]

4

Yes

24

51 [3–277]

380 [20–2482]

2213 [110–12390]

 

No

173

57 [2–1070]

320 [10–4830]

1992 [120–21250]

5

Yes

17

80 [4–1070]

403 [20–4830]

2415 [110–21250]

 

No

180

52 [2–519]

325 [10–2660]

1960 [120–16200]

6

Yes

17

90 [9–230]

470 [120–1105]

3118 [1017–5481]

 

No

180

50 [2–1070]

318 [10–4830]

1890 [110–21250]

7

Yes

10

50 [6–220]

460 [81–1809]

1832 [490–9460]

 

No

187

58 [2–1070]

330 [10–4830]

2020 [110–21250]

  1. N = number of patients; M6G = Morphine-6-glucuronide; M3G = Morphine-3-glucuronide
  2. No statistical differences between carriers and non-carriers of the different haplotype groups for morphine, M6G and M3G serum concentration