Table 2 Summary of 24-hour mortality of Anopheles funestus mosquitoes collected as larvae and exposed to pyrethroids (deltamethrin or permethrin) at different age classes (3–5, 8–11 or 17–20 days old)
Insecticide | Insecticide dose | Age (days) | Mean mortality (95%CI) | OR (95% CI) | p–value |
|---|---|---|---|---|---|
|  |  | 3–5 | 25% (16.73–53.60) | Ref. | Ref. |
|  | 1× | 8–11 | 36% (26.15–46.76) | 1.67 (0.85–3.30) | 0.138 |
|  |  | 17–20 | 40% (29.89–51.05) | 2.00 (1.02–3.93) | 0.044* |
|  |  | 3–5 | 45% (34.50–55.97) | Ref. | Ref. |
Deltamethrin | 5× | 8–11 | 54% (42.82–64.33) | 1.42 (0.76–2.65) | 0.269 |
|  |  | 17–20 | 70% (59.12–79.01) | 2.85 (1.49–5.46) | 0.002* |
|  |  | 3–5 | 58% (46.48–67.82) | Ref. | Ref. |
|  | 10× | 8–11 | 76% (65.73–84.31) | 2.37 (1.20–4.68) | 0.013* |
|  |  | 17–20 | 81% (71.20–88.37) | 3.35 (1.57–6.55) | 0.001* |
|  |  | 3–5 | 20% (12.63–30.19) | Ref. | Ref. |
|  | 1× | 8–11 | 41% (31.03–52.29) | 2.81 (1.39–3.69) | 0.004* |
|  |  | 17–20 | 79% (68.44–86.36) | 14.82 (6.89–31.89) | < 0.001* |
|  |  | 3–5 | 84% (74.00–90.32) | Ref. | Ref. |
Permethrin | 5× | 8–11 | 93% (84.30–96.59) | 2.39 (0.86–6.65) | 0.094 |
|  |  | 17–20 | 98% (90.55–99.37) | 7.57 (1.65–34.74) | 0.009* |
|  |  | 3–5 | 80% (69.81–87.37) | Ref. | Ref. |
|  | 10× | 8–11 | 99% (91.66–99.82) | 19.75 (2.55–25.95) | 0.004* |
|  |  | 17–20 | 96% (89.01–98.79) | 6.42 (1.79–23.01) | 0.004* |