Fig. 1From: Modelling longitudinal binary outcomes with outcome dependent observation times: an application to a malaria cohort studyObserved parasite prevalence by time (in months) since the start of the study based on routine data collected in Walukuba (brown), Kihihi (red) and Nagongera (orange; left panel), and stacked histogram of the time at risk in years (times to symptomatic malaria infection) obtained from clinical visits in Walukuba (brown), Kihihi (red) and Nagongera (orange, right panel). In the left panel, the size of the points is proportional to number of observationsBack to article page