Figure 3

Association between α⁺-thalassaemia and malaria rates, overall and by age class (episodes with densities > 10,000/μL). Malaria episodes as predefined, but with densities of asexual parasites > 10,000/μL. Estimates were adjusted as described in Figure 2; p-values for the difference in hazard ratios between children < 18 months and ≥ 18 months: 0.002 and 0.07, for hetero-and homozygotes respectively.