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Table 6 Relative effects of adding different types of LLINs into huts with different IRS treatments

From: Comparative field evaluation of combinations of long-lasting insecticide treated nets and indoor residual spraying, relative to either method alone, for malaria prevention in an area where the main vector is Anopheles arabiensis

 

Olyset® nets added

PermaNet 2.0® nets added

Icon Life® nets added

  

RR (95% CI)

P value

RR (95% CI)

P value

RR (95% CI)

P value

Unsprayed huts

Dry season

1.315 (1.172 – 1.590)

< 0.001

2.300 (1.981 – 2.672)

< 0.001

2.177 (1.914 – 2.477)

< 0.001

 

Wet season

1.328 (1.119 – 1.470)

< 0.001

1.654 (1.575 – 1.736)

< 0.001

1.545 (1.415 – 1.688

< 0.001

Huts sprayed with DDT

Dry season

0.997 (0.769 – 1.129)

= 0.232

1.184 (0.998 – 1.404)

= 0.052

1.221 (0.823 – 1.532)

= 0.079

 

Wet season

1.172 (0.972 – 1.323)

= 0.093

1.181 (1.056 – 1.320)

= 0.003

1.227 (0.823 – 1.621)

= 0.081

Huts sprayed with Lambda cyhalothrin

Dry season

0.841 (0.739–0.956)

= 0.008

1.461 (1.285 – 1.662)

< 0.001

1.239 (1.094 – 1.405)

< 0.001

 

Wet season

1.157 (0.921 – 1.454)

= 0.210

1.698 (1.354 – 2.129)

< 0.001

1.433 (1.190 – 1.725)

< 0.001

Huts sprayed with Pirimiphos methyl

Dry season

0.994 (0.866–1.141)

= 0.930

1.773 (1.544 – 2.036)

< 0.001

1.387 (1.224 – 1.571)

< 0.001

 

Wet season

1.321 (1.126 – 1.549)

= 0.001

1.262 (1.075 – 1.481)

= 0.004

1.386 (1.182 – 1.626)

< 0.001

  1. The table shows relative rates (RR) and associated 95% confidence intervals of increased mortality of Anopheles arabiensis in huts with IRS plus LLINs, compared to huts with IRS supplemented only with untreated nets.