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Table 4 Effects of vegetation densities on performance of the ATSBs (when the observations in chambers with no vegetation are considered as reference). Comparative effects of the vegetation densities are estimated by Chi-Square test

From: Effects of vegetation densities on the performance of attractive targeted sugar baits (ATSBs) for malaria vector control: a semi-field study

Parameter estimated

Trap

Vegetation cover

Mean (± 2SE)

OR 95% CI

P-value

χ2, p-value

Indoor biting risk

CDC light traps

No vegetation

6.8 (5.3–8.4)

1

 

(33.12, < 0.001)

Sparse vegetation

10.4 (9.3–11.4)

0.64 (0.56–0.74)

< 0.001

Dense vegetation

12.5 (11.6–13.3)

0.53 (0.47–0.60)

< 0.001

Outdoor biting risk

Human landing catches (HLC)

No vegetation

28.2 (21.4–35.9)

1

 

(346.05, < 0.001)

Sparse vegetation

34.6 (31.5–37.8)

0.79 (0.66–0.95)

0.01

Dense vegetation

28.2 (26.7–29.7)

1.02 (0.85–1.22)

0.87

Indoor-resting densities

Prokopack aspirators (indoors)

No vegetation

1.9 (1.7–2.1)

1

 

(0.15, 0.93)

Sparse vegetation

2.0 (1.8–2.1)

0.95 (0.81–1.11)

0.53

Dense vegetation

2.0 (1.8–2.2)

0.93 (0.8–1.09)

0.39

Outdoor-resting densities

Prokopack aspirators (outdoors)

No vegetation

2.5 (2.4–2.7)

1

 

(1.97, 0.37)

Sparse vegetation

2.4 (2.2–2.6)

1.05 (0.91–1.2)

0.51

Dense vegetation

2.4 (2.3–2.6)

1.04 (0.91–1.19)

0.58