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Table 2 Impact of IRS and LLIN on the prevalence of malaria in Zambia, 2006 to 2011

From: The changing burden of malaria and association with vector control interventions in Zambia using district-level surveillance data, 2006–2011

 

Total prevalence

Severe malaria

Deaths due to malaria

 

PRR* (95% CI)

PRR (95% CI)

PRR (95% CI)

IRS (per 1,000 household coverage)

0

1

1

1

<500

1.19 (1.19–1.20)

1.33 (1.32–1.34)

1.12 (1.07–1.17)

≥500

1.49 (1.49–1.50)

1.49 (1.48–1.50)

1.54 (1.46–1.62)

LLIN (per two household residents coverage)

<1

1

1

1

≥1

0.91 (0.90–0.91)

0.89 (0.88–0.89)

0.96 (0.92–1.00)

Year

   

2006

1

1

1

2007

0.89 (0.89–0.90)

0.87 (0.86–0.87)

0.94 (0.90–0.97)

2008

0.61 (0.61–0.62)

0.58 (0.57–0.58)

0 .54 (0.51–0.57)

2009

0.58 (0.57–0.58)

0.63 (0.62–0.63)

0.61 (0.59–0.65)

2010

0.72 (0.71–0.72)

0.74 (0.73–0.74)

0.61 (0.58–0.65)

2011

0.74 (0.73–0.74)

0.60 (0.59–0.60)

0.55 (0.52–0.58)

  1. * PRR = Prevalence rate ratio.