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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.