Table 3.
The relative risk, as given by the odds-ratio, for the lid types and areas for the presence of Aedes immature stages in (a) August and October and (b) December and February
| (a) August and October | ||||
|---|---|---|---|---|
|
Month |
Risk factor |
Odds ratio (95% CI) |
P |
|
| August |
Area |
|
|
|
| |
Control |
1.0 |
|
|
| |
Trial |
1.7 (1.4-2.1) |
<0.001 |
|
| |
Lid1) |
|
|
|
| |
FL |
1.0 |
|
|
| |
GL |
0.7 (0.6-0.9) |
<0.01 |
|
| |
NL |
1.3 (1.1-1.6) |
<0.05 |
|
| October |
Area |
|
|
|
| |
Control |
1.0 |
|
|
| |
Trial |
0.7 (0.5-0.9) |
<0.01 |
|
| |
Lid1) |
|
|
|
| |
FL |
1.0 |
|
|
| |
GL |
1.3 (0.9-1.8) |
0.1 |
|
| |
NL |
2.7 (2.0-3.6) |
<0.001 |
|
|
(b) December and February | ||||
|
Month |
Site |
Risk factor |
Odds ratio (95% CI) |
P |
| December1) |
Control |
Lid3) |
|
|
| |
|
FL |
1.0 |
|
| |
|
GL |
2.0 (1.4-2.8) |
<0.001 |
| |
|
NL |
2.0 (1.4-2.9 |
<0.001 |
| |
Trial |
Lid3) |
|
|
| |
|
FL |
1.0 |
|
| |
|
GL |
2.1 (1.2-3.6) |
<0.05 |
| |
|
NL |
5.0 (3.0-8.3) |
<0.001 |
| February2) |
Control |
Lid3) |
|
|
| |
|
FL |
1.0 |
|
| |
|
GL |
2.3 (1.2-4.4) |
<0.01 |
| |
|
NL |
5.6 (3.4-9.3) |
<0.001 |
| |
Trial |
Lid3) |
|
|
| |
|
FL |
1.0 |
|
| |
|
GL |
1.8 (1.3-2.7) |
<0.05 |
| NL | 1.9 (1.3-2.7) | <0.001 | ||
1)P value for interaction = 0.01.
2)P value for interaction = 0.003.
3) NL; no cover, GL; a lid with a gap, FL; a fitted lid.
1) NL; no cover, GL; a lid with a gap, FL; a fitted lid.