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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 Príncipe for the year 2009

From: Pre-elimination of malaria on the island of Príncipe

Intervention Malaria cases Total cases OR 95% CI P value
IRS only 21 2811 1   0.008
Unprotected 7 273 3.496 1.473 - 8.300 0.005
LLINs only 5 228 2.979 1.113 - 7.975 0.030
IRS + LLINs 19 2297 1.108 0.594 - 2.066 0.747
  1. IRS: indoor residual spraying; LLINs: long lasting insecticide-treated nets;
  2. OR: odds ratio; IC: confidence interval.