Fig 1.
Examples of the methodological approach used to compute sequences and Longest Common Subsequence distance.
Fig 2.
Eligibility flow chart in a Sankey diagram (flow diagram in which the thickness of the lines is proportional to the flow quantity) by survey round.
Different colours represent the year in which persons first became eligible for HIV surveillance. The numbers in the grey bars represent the number of persons eligible for HIV surveillance during a given survey round. The numbers below the grey bars represent the persons who enter or exit the HIV surveillance eligible population because of death, in- and out-migration or ageing into the open cohort.Annual participation rates and cumulative rates.
Fig 3.
Crude annual participation rates (including the effective HIV surveillance coverage) and HIV surveillance acceptance rates by survey round.
Fig 4.
Proportion of persons having consented to provide a blood sample at least once, twice or three times as a function of sequence position.
Table 1.
Factors associated with contact and consent from two binomial logistic regression model.
Fig 5.
Participation flow chart by sequence position in a Sankey diagram (flow diagram in which the thickness of the lines is proportional to the flow quantity) of the three participation profiles (consenters, switchers, refusers) identified by the cluster analysis in persons with long participation sequence (7–9 rounds).
This flowchart represents the flows between participation outcomes from one sequence position to the next one.
Table 2.
Characteristics of three participation profiles (consenters, switchers, refusers) identified by the cluster analysis in persons with long participation sequence (7–9 rounds).