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Table 4 Cox’s proportional hazards model analyses of the emergence of larvae exposed from first instar

From: Impact of sunlight exposure on the residual efficacy of biolarvicides Bacillus thuringiensis israelensis and Bacillus sphaericus against the main malaria vector, Anopheles gambiae

  Estimate (se) Hazard ratio P value
Treatments
 Dosage 1 g/m2 − 0.15 (0.31) 0.86 6.3e−01
 Dosage 1.5 g/m2 − 0.97 (0.31) 0.38 1.6e−03**
 Dosage 2 g/m2 − 1 (0.31) 0.37 1.1e−03**
Protection from sunlight exposure 0.54 (0.31) 1.72 7.9e−02
Days after treatment 0.02 (0) 1.02 5.9e−06***
Interactions between treatments and protection from exposure
 Dosage 1 g/m2 in covered containers − 2.6 (0.44) 0.07 3.6e−09***
 Dosage 1.5 g/m2 in covered containers − 1.69 (0.44) 0.18 1.3e−04***
 Dosage 2 g/m2 in covered containers − 2.08 (0.45) 0.12 3.2e−06***
  1. ** P < 0.01, *** P < 0.001