Individual Predisposition, Household Clustering and Risk Factors for Human Infection with Ascaris lumbricoides: New Epidemiological Insights (original) (raw)
Figure 1
An illustration of the hierarchical structure of the data on Ascaris lumbricoides worm counts.
Participants live in households such that nk participants live in household k and there are K households all together (K = 459, see main text “_Sample Size, Data Structure and Missing Values_”). The total number of participants is 1,795. Each participant contributes at most three measurements of worm burden, one after each round of chemo-expulsive treatment with pyrantel pamoate, and at least one measurement (after the first round of treatment). Participants who were not “satisfactorily de-wormed” (see main text “_Sample Size, Data Structure and Missing Values_”) at a given round of treatment were not subsequently followed up.