Table 3. Negative binomial mixed effects analysis of the effect of repellent treatment and mosquito genus on the number of mosquitoes collected per man per day.
| Group 1 | Group 2 | IRRa [95%CI] | p-value |
| Treatment | |||
| picaridin 20% | < picaridin 10% | 0.429 [0.237–0.777] | 0.005 |
| DEET 20% | < picaridin 10% | 0.344 [0.184–0.642] | <0.001 |
| DEET 20% | picaridin 20% | 0.801 [0.410–1.566] | 0.517 |
| Genus | |||
| Anopheles spp. | Aedes spp. | 1.199 [0.639–2.252] | 0.572 |
| Anopheles spp. | > Culex spp. | 2.765 [1.541–4.960] | <0.001 |
| Anopheles spp. | > Mansonia spp. | 2.511 [1.316–4.794] | 0.005 |
| Aedes spp. | > Culex spp. | 2.306 [1.223–4.343] | 0.010 |
| Aedes spp. | > Mansonia spp. | 2.094 [1.043–4.202] | 0.038 |
| Culex spp. | Mansonia spp. | 0.908 [0.477–1.730] | 0.770 |
Incidence Rate Ratios with 95% confidence interval and p-values are reported.
a
The Incidence Rate Ratio (IRR) indicates how much more (if >1) or less (if <1) mosquitoes were collected in Group 1 as compared to Group 2. In the group with the highest number of mosquitoes collected, the protective efficacy of the tested repellents is the lowest.