Figure 1.
Comparing fit for the Poisson, Pareto and Negative Binomial distributions using observed total clinical malaria episodes per child as outcome.
The X-axis is the total clinical episodes of malaria experienced per child and Y-axis is the proportion of children with given total disease episodes. The bars are the observed total number of cases per child, the black line is the predicted totals from the Poisson regression model, the dashed line represent the predicted total episodes from the negative binomial regression model while the crossed lines represents the predicted total episodes from the Pareto distribution. Figure (a) represents all the children, (b) all children under 5 years at the time the study started (who were followed up from 1998 to 2003) and (c) children ≥5 years of age (followed up from 1998 to 2001).
Figure 2.
Non-admission clinical malaria episodes/child/year among children that were admitted at least once or never admitted during 3–5 years of follow-up.
Box plot of the median(central line) 25%, 75% quartile ranges around the median (box width) and the upper and lower limits (T).
Table 1.
Episodes per child/year showing continuity of being ‘more susceptible’ over time.
Table 2.
Factors associated with children being ‘more susceptible’ than others.
Figure 3.
Distribution of the total number of ‘more susceptible’ children within study households.
The clear circles represents the households that did not have any children ‘more susceptible’ than others, the circles with squares represent the households that had between 1–3 children ‘more susceptible’, the grey circles represent those that had 4–6 and the black circles represent those that had more than 7 children in the households ‘more susceptible’ than others. The smaller dots spread across the map are all the other households within the larger study area that were not included in the surveillance.
Figure 4.
Kaplan-Meier survival curve of the time to first episode of clinical malaria.
Dashed line represents the ‘more susceptible’ children and the solid line represents the time to first episode for the other children.