Table 3

Proportion of fevers positive for malaria compared with the fraction of fevers (and 95% confidence intervals) attributable to malaria in individuals less than and greater than 15 years old, calculated by Method 1: and Method 2: . P_f is the proportion of fevers with parasites and P_a the proportion of asymptomatic but parasite positive individuals.

Age (years)

Propn. fevers malaria positive

AF – Method1

AF – Method2

Pfal

< 15

0.104

0.086 (0.072–0.103)

0.101 (0.098–0.103)

≥ 15

0.101

0.089 (0.072–0.11)

0.099 (0.097–0.100)

Pviv

< 15

0.051

0.041 (0.031–0.053)

0.048 (0.045–0.050)

≥ 15

0.028

0.025 (0.016–0.038)

0.028 (0.027–0.028)

AF: Attributable Fraction. Pfal: Plasmodium falciparum; Pviv: Plasmodium vivax. See Methods for details.

Phimpraphi et al. Malaria Journal 2008 7:99   doi:10.1186/1475-2875-7-99