Table 5 Hypothetical illustration of infection prevalence by ITN use and by resistance stratum demonstrating loss of effectiveness expressed as an odds ratio
Deltameth. resistance (2012) of clusters (no. of clusters) | ITN-use | Infection prevalence, % (N) | ITN effectiveness | Effect modification of resistance on effectiveness |
|---|---|---|---|---|
Odds ratio ITN-use versus no net use | Change in effectiveness ratio, (high versus low resistance) | |||
Low resistance (mortality ≥80%) | No | 49 | 1 | |
Yes | 27 | 0.4 | 1 | |
High resistance (mortality <80%) | No | 37 | 1 | |
Yes | 30 | 0.7 | 1.75 [1.1–5.0] |