| |
Pre-Interventiona
|
First intervention yearb
|
Percentage Reduction
|
|---|
| |
Non-Intervention Wards
|
Intervention Wards
|
p
c
|
Non-Intervention Wards
|
Intervention Wards
|
p
| |
|---|
|
Annual mean
|
|
Daily HBR An. gambiae
|
0.93 (0.60–1.46)
|
0.72 (0.51–1.02)
|
0.367
|
0.94 (0.57–1.56)
|
0.50 (0.38–0.68)
|
0.040
|
31.3%
|
|
Annual EIR An. gambiae
|
1.05 (0.68–1.65)
|
0.81 (0.58–1.15)
| |
1.06 (0.64–1.77)
|
0.56 (0.43–0.77)
| | |
|
Daily HBR Culex sp.
|
173.9 (140.7–214.9)
|
86.8 (72.7–103.7)
|
<0.001
|
171.5 (137.2–214.3)
|
86.1 (70.9–104.4)
|
<0.001
|
0%
|
|
Dry season mean (July-August-September)
|
|
Daily HBR An. gambiae
|
0.59 (0.32–1.11)
|
0.46 (0.29–0.72)
|
0.505
|
1.17 (0.56–2.47)
|
0.12 (0.08–0.20)
|
<0.001
|
86.8%
|
|
EIR An. gambiae
|
0.67 (0.36–1.26)
|
0.52 (0.33–0.81)
| |
1.32 (0.63–2.79)
|
0.14 (0.09–0.22)
| | |
|
Daily HBR Culex sp.
|
196.3 (157.9–244.0)
|
98.4 (82.2–117.9)
|
<0.001
|
151.1 (125.3–192.0)
|
86.1 (67.1–110.6)
|
<0.001
|
0%
|
- a April 2005 – March 2006; March 2006 has been included in the calculation for the baseline year since reductions of adult mosquitoes due to larviciding cannot be expected earlier than 3–4 weeks into the intervention [36].
- b April 2006 – March 2007.
- c Generalized estimating equations (GEE) were used to analyse pre-intervention data and data from the first year of intervention, respectively. In each analyses mean densities are compared between non-intervention and intervention sites. Ten-cell units were used as a subject unit, log linked mosquito densities and intervention and non-intervention areas as the factor.
