Figure 3

Variation in prevalence of protozoan infections by age of host. For numbers of subject in each age class see Table 1, and the statistical analysis of the individual components of the final model is given in the text. A. B. hominis. For the goodness of fit of the minimum sufficient model, the likelihood ratio χ²₈₃₄ = 751.9 (P = 0.98). B. G. duodenalis. For the goodness of fit of the minimum sufficient model, the likelihood ratio χ²₈₄₂ = 621.8 (P = 1). C. Non-pathogenic amoebae. For the goodness of fit of the minimum sufficient model, the likelihood ratio χ²₇₉₂ = 577.3 (P = 1).