Table 5

Log-rank test of probability of survival (i.e. remaining re-infection free), by age group and day 7 lumefantrine concentration.

C [lum]_day7 (ng/mL)

< 5 years

5–14 years

≥15 years

Total

n_c

n_r

p_surv

n_c

n_r

p_surv

n_c

n_r

p_surv

n_c

n_r

p_surv

<200

47

5

0.889

32

4

0.871

33

2

0.938

112

11

0.898

200–399

51

3

0.940

77

2

0.987

63

2

0.968

191

7

0.968

400–599

20

0

1.000

34

0

1.000

33

0

1.000

87

0

1.000

≥600

11

0

1.000

30

0

1.000

21

0

1.000

62

0

1.000

p-value (trend):

0.002

0.283

0.399

<0.001

n_c = number in category n_r = number of re-infections p_surv = probability of survival

Checchi et al. Malaria Journal 2006 5:59   doi:10.1186/1475-2875-5-59