Table 1 Description of the interventions, combinations of intervention and routine arms
Study arms | Number of households | Description of the interventions |
|---|---|---|
LLIN alone | 1387 | Universal coverage of households with LLINs: each household received free LLINs (PermaNet 2.0)—proportional allocation to the household size —99% coverage immediately after distribution (October 2014) |
IRS alone | 1526 | Universal coverage of households with IRS: using Propoxur (isopropoxy-phenyl methylcarbamate) each house sprayed once every year—about 95% coverage for each of the three rounds of spraying (September 2014, July 2015, and July 2016) |
Combination (LLIN + IRS) | 1615 | Each household received LLINs and IRS in parallel with households in the individual arms, and therefore had IRS coverage of 95% and LLIN coverages of 99% |
Routine | 1541 | Neither LLIN, nor IRS was implemented by either the study project or by the district health office within the study period. Based on the baseline data, the background coverage of LLINs was 11% |