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

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