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Table 5 Cluster t-tests of differences in HI, CI and BI between intervention and control clusters in rainy and dry seasons

From: Pupal productivity in rainy and dry seasons: findings from the impact survey of a randomised controlled trial of dengue prevention in Guerrero, Mexico

  Rainy season Dry season
HI
  Intervention clusters Control clusters Intervention clusters Control clusters
Mean HI 0.160 0.210 0.121 0.179
Difference in mean HI between intervention and control clusters −0.05 −0.06
Cluster adjusted 95% CI of difference −0.094 to −0.009 −0.102 to −0.013
t value −2.591 −2.439
Degrees of freedom 88 88
P value 0.011 0.017
CI
  Intervention clusters Control clusters Intervention clusters Control clusters
Mean CI 0.075 0.115 0.046 0.071
Difference in mean CI between intervention and control clusters −0.041 −0.025
Cluster adjusted 95% CI of difference −0.062 to −0.020 −0.045 to −0.005
t value −3.906 −1.996
Degrees of freedom 88 88
P value 0.000 0.049
BI
  Intervention clusters Control clusters Intervention clusters Control clusters
Mean BI 0.270 0.360 0.190 0.290
Proportion of households above overall mean 0.15 0.20 0.11 0.17
Difference in proportion of households above mean between intervention and control clusters −0.05 −0.05
Cluster adjusted 95% CI of difference −0.093 to −0.009 −0.092 to −0.011
t value 2.591 2.404
Degrees of freedom 88 88
P value 0.011 0.018
  1. HI house index, CI container index, BI Breteau index