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Table 3 Haematological changes between days 0 and 7 based on CYP2D6 and G6PD status

From: A single low dose of primaquine is safe and sufficient to reduce transmission of Plasmodium falciparum gametocytes regardless of cytochrome P450 2D6 enzyme activity in Bagamoyo district, Tanzania

Haematological changes based on CYP2D6 status

A: absolute haemoglobin reduction

Day of follow-up

Reduced CYP2D6

Normal CYP2D6

Statistical test

Mean (95%CI)

Mean (95%CI)

Day 1

0.86 (0.50–1.22)

0.67 (0.49–0.86)

t = 1.034, p = 0.303

Day 2

1.28 (0.89–1.65)

1.21 (1.01–1.42)

t = 0.383, p = 0.703

Day 3

1.50 (1.10–1.90)

1.51 (1.31–1.71)

t = 0.012 p = 0.990

Day 7

1.16 (0.70–1.62)

1.05 (0.79–1.28)

t = 0.428, p = 0.669

B: relative % haemoglobin reduction

Day of follow-up

Day 1

7.65 (4.24–10.62)

6.12 (4.16–7.55)

t = 0.834, p = 0.406

Day 2

11.15 (7.84–14.13)

11.02 (8.97–12.64)

t = 0.069, p = 0.945

Day 3

13.12 (9.51–16.44)

13.80 (11.81–15.43)

t = − 0.347, p = 0.729

Day 7

9.82 (5.96–13.68)

9.19 (6.86–11.30)

t = 0.270, p = 0.788

Haematological changes based on G6PD status

A: mean absolute haemoglobin reduction

Day of follow-up

G6PD deficient, mean (95%CI)

G6PD Normal, mean (95%CI)

G6PD Heterozygous mean (95%CI)

Statistical Test

Day 1

0.94 (0.52–1.35)

0.69 (0.52–0.88)

0.72 (0.16–1.29)

F = 0.463, p = 0.630

Day 2

1.27 (0.83–1.71)

1.24 (1.03–1.45)

1.19 (0.66–1.72)

F = 0.028, p = 0.972

Day 3

1.82 (1.32–2.32)

1.48 (1.30–1.67)

1.47 (0.76–2.18)

F = 0.838, p = 0.435

Day 7

1.55 (1.02–2.08)

1.05 (0.82–1.28)

0.75 (− 0.04 to 1.53)

F = 2.063, p = 0.131

B: mean relative % haemoglobin reduction

Day of follow-up

Day 1

8.35 (4.58–12.12)

6.12 (4.44–7.81)

6.43 (1.20–11.66)

F = 0.438, p = 0.618

Day 2

11.13 (7.28–14.98)

11.07 (9.25–12.89)

10.82 (5.90–15.73)

F = 0.007, p = 0.993

Day 3

16.46 (12.0–20.92)

13.27 (11.63–14.9)

13.10 (6.39–19.81)

F = 0.928, p = 0.398

Day 7

13.57 (9.39–17.75)

9.06 (6.95–11.17)

6.57 (− 0.87 to 14.01)

F = 1.896, p = 0.154

  1. t T-test, F ANOVA