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Table 3 Association of anemia with microscopic Plasmodium spp. infection according to age groups

From: Prevalence of non-Plasmodium falciparum species in southern districts of Brazzaville in The Republic of the Congo

Age groups (years) Normal values (g/dl) Anemic, % (n) RR (95% CI) P-value
P. falciparum infection
 1–4 (N = 43)  ≥ 11 39.5 (17) 0.637 (0.417–0.974) 0.0374
 5–9 (N = 81)  ≥ 11.5 46.9 (38) 0.537 (0.393–0.733) 0.0001
 10–14 (N = 86)  ≥ 12 58.1 (50) 0.433 (0329–0.571)  < 0.0001
 ≥ 15  (N = 262)  ≥ 13 25.2 (66) Ref. group
P. malariae infection
 1–4 (N = 43)  ≥ 11 2.3 (1) 0.492 (0.052–4.626) 0.5353
 5–9 (N = 81)  ≥ 11.5 2.5 (2) 0.464 (0.079–2.727) 0.3953
 10–14 (N = 86)  ≥ 12 3.5 (3) 0.328 (0.068–1.596) 0.1674
 ≥ 15 (N = 262)  ≥ 13 1.1 (3) Ref. group
  1. n Number of infected participants who were anemic, N total number of anaemic participants, RR relative risk