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Table 1 Oviposition response of gravid Anopheles gambiae sensu stricto to substrates in two-choice tests. Generalized linear model outputs

From: Analysing chemical attraction of gravid Anopheles gambiae sensu stricto with modified BG-Sentinel traps

Oviposition substrates   Mean proportion Odds ratio p-value
Control (trap A) Test (trap B) (95 % CI) (95 % CI)
Proportion of gravid females trapped in test (trap B) in two choice experiments of the females trapped
 Distilled water Distilled water 0.50 (0.43–0.57) 1  
 Distilled water Infusion 0.64 (0.58–0.70) 1.8 (1.3–2.6) 0.004
 Distilled water + NaCl Infusion + NaCl 0.77 (0.72–0.81) 3.4 (2.4–4.8) <0.001
 Infusion Infusion + NaCl 0.67 (0.60–0.69) 1.8 (1.3–2.5) 0.001
Response rate of released gravid females during experiments with different substrate combinations
 Distilled-Distilled 0.45 (0.33–0.57) 1  
 Distilled-Infusion 0.51 (0.39–0.63) 1.3 (0.6–2.5) 0.438
 Distilled + NaCl – Infusion + NaCl 0.74 (0.63–0.84) 3.7 (1.8–7.5) <0.001
 Infusion - Infusion + NaCl 0.84 (0.73–0.91) 6.8 (3.1–15.0) <0.001
Response of gravid females before 21:30 h of the females trapped during the night (early responders)
 Distilled-Distilled 0.36 (0.28–0.45) 1  
 Distilled-Infusion 0.56 (0.46–0.67) 1.59 (1.11–2.29) 0.003
 Distilled + NaCl – Infusion + NaCl 0.66 (0.58–0.74) 1.92 (1.38–2.68) <0.001
 Infusion - Infusion + NaCl 0.64 (0.54–0.73) 1.76 (1.29–2.44) 0.001