Table 2.

IRS coverage across sampled districts

District	IRS coverage as measured by interview (95% confidence interval), n = 2679 households; 87 transects	IRS coverage as measured by card (95% confidence interval), n = 2679; 87 target areas
Kasama	54.5% (44.9–64.1%)	36.0% (26.7–45.2%)
Nchelengea, b	68.6% (62.9–74.2%)	66.1% (58.9–73.2%)
Samfyaa	64.9% (55.7–74.0%)	64.6% (55.8–73.4%)

Kasama, Nchelenge and Samfya all received different levels of spatial aid during IRS implementation (see Table 1). Spatial aid indicated by ^a representing use of paper-based maps during implementation or by ^b representing mSpray field implementation