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Table 1 Frequency of G6PD genotypes in 6 primary health care clinics in Vhembe District, Limpopo Province, South Africa

From: Understanding human genetic factors influencing primaquine safety and efficacy to guide primaquine roll-out in a pre-elimination setting in southern Africa

 

Genotypes

HW P(χ2)

Males

Females

No.

A−

A+

B

No.

A−A−

A+A−

BA−

A+A+

BB

BA+

Folovhodwe

10

1

4

5

43

0

5

3

0

24

11

0.880

Madimbo

6

0

0

6

51

0

1

6

2

24

18

NC

Mananzhe

9

0

3

6

38

0

1

3

2

24

8

0.548

Masisi

11

1

2

8

25

0

1

5

1

11

7

0.197

Mulala

7

2

2

3

11

0

1

0

3

3

4

0.317

Tshipise

12

2

1

9

25

2

1

5

1

6

10

0.009*

Totals

55

6

12

37

193

2

10

22

9

92

58

0.007*

  1. G6PD genotypes: male (X*Y) hemizygous deficient A−, male (XY) normal A+ or B; female (X*X*) homozygous deficient = A−/A−; female (X*X) heterozygous deficient = A+/A− or B/A−; and female (XX) normal = A+/A+, B/B or B/A+
  2. NC = not calculated as all males tested in Madimbo clinic carried the G6PD B variant
  3. * P values < 0.05 indicate significant differences from predicted G6PD allele frequencies in females based on male allele frequencies for A−, A+ and B alleles using the Hardy–Weinberg equation (χ2)