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Table 1 Effect of combining indoor residual spraying (IRS) and long-lasting insecticide-treated nets (LLINs) interventions on malaria infection in São Tomé during the first half year of 2009

From: Potential threat of malaria epidemics in a low transmission area, as exemplified by São Tomé and Príncipe

Intervention Malaria cases Total cases OR 95% CI P value
IRS only 492 3775 1   <0.001
Unprotected 355 1605 1.895 1.629 - 2.204 <0.001
LLINs only 136 1934 0.505 0.414 - 0.615 <0.001
IRS + LLINs 95 5149 0.125 0.100 - 0.157 <0.001
  1. IRS: indoor residual spraying; LLINs: long lasting insecticide-treated nets;
  2. OR: odds ratio; IC: confidence interval.