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Table 6 Impact of larviciding on late stage Anopheles larvae occupancy.

From: Achieving high coverage of larval-stage mosquito surveillance: challenges for a community-based mosquito control programme in urban Dar es Salaam, Tanzania

Variable Proportion occupied % (n/N) OR [95% CI] P
Intervention status    
   Non-larviciding 4.1 (44/1070) 1.00a NA
   Larviciding area 5.9(111/1895) 2.32 [2.19,6.14] < 0.004
Intervention status × habitat found by CORP    
Found and reported by CORPs    
   Non-larviciding 0.9 (7/782) 1.00a NA
   Larviciding area 0.3 (3/1181) 0.22 [0.147,0.34] < 0.001
Not found or reported as dry habitats    
   Non-larviciding area 4.7 (37/782) 1.00a NA
   Larviciding area 9.1(108/1181) 0.73 [0.383,1.37] 0.325
  1. The Odds of change of late Anopheles habitat occupancy subject to CORPs detection sensitivity of wet habitats and subsequent larvicide application as interacting terms modelled with a binary distribution and logit link function using Generalized Estimating Equations (GEE)
  2. a reference group for a particular variable,
  3. CI; confidence interval,
  4. NA; Not applicable
  5. n/N; the proportion of all habitats found to contain late stage Anopheles larvae by observations of the CORPs and the investigator.
  6. OR; Odds ratios.