Table 3.
Sandfly abundance by year (2011 and 2012) and by intervention arm
| Year | Study arm | Sandfly count, mean per night | Sandfly abundance, mean/ m2 | Sandfly abundance ratio | 95% CI | P value | |
|---|---|---|---|---|---|---|---|
| 2011 | Control | 55.4 | 11.6 | 1 | − | − | − |
| LLIN | 64.8 | 13.3 | 1.17 | 0.35 | 3.9 | 0.777 | |
| IRS | 25.8 | 5.2 | 0.47 | 0.21 | 1.03 | 0.059 | |
| 2012 | Control | 59.0 | 13.0 | 1 | − | − | − |
| LLIN | 43.7 | 9.1 | 0.74 | 0.39 | 1.40 | 0.319 | |
| IRS | 22.0 | 4.4 | 0.37 | 0.16 | 0.86 | 0.025 | |
| 2011/2012 combined | Control | 57.2 | 12.3 | 1 | − | − | − |
| LLIN | 54.4 | 11.2 | 0.91 | 0.38 | 2.19 | 0.823 | |
| IRS | 23.9 | 4.8 | 0.39 | 0.18 | 0.85 | 0.022 | |
CI = confidence interval; IRS = indoor residual spraying; LLIN = long-lasting insecticidal net.