Table 2.

Parasite density by participant type and age

	No. of PCR-positive infections	Plasmodium falciparum density, p/µL, geometric mean (95% CI)	P-value*
Overall	2,180	12.1 (10.4–14.0)	Not applicable
Type of participant
Control child	141	1.3 (1.0–1.8)	< 0.001
Case child	356	1,717 (1,172–2,514)
Control household member	626	4.0 (3.2–4.9)
Case household member	1,057	5.9 (5.0–6.9)
Age (years)†
< 5	298	5.2 (3.7–7.2)	< 0.001
5–15	624	8.4 (6.6–10.6)
≥ 15	761	3.4 (2.9–4.0)

* Computed with analysis of variance comparing log₁₀-transformed densities.

† Excluding case children.