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Table 2 The estimated total and nightly mean catch by CDC-LT and the human decoy trap (HDT) compared to the human landing catch (HLC)

From: The Centres for Disease Control light trap (CDC-LT) and the human decoy trap (HDT) compared to the human landing catch (HLC) for measuring Anopheles biting in rural Tanzania

  

An. arabiensis

An. funestus

Culex spp

Trap type

Total collections

Total caught

Geometric mean (95%CI)

Median (90% central range)

Range

Adj.RR† (95%CI)

p-value

Total caught

Geometric mean (95%CI)

Median (90% central range)

Range

Adj.RR† (95%CI)

p-value

Total caught

Geometric mean (95%CI)

Median (90% central range)

Range

Adj.RR† (95%CI)

p-value

Indoor HLC

339

3380

2.39 (1.93–2.91)

1(0–61)

0–180

1

 

3934

4.22 (3.53–5.02)

5(0–58)

0–147

1

 

4803

6.51 (5.58–7.57)

7(0–46)

0–196

1

 

CDC-LT

6013

10,281

0.51 (0.48–0.54)

0(0–7)

0–658

0.35 (0.27–0.46)

 < 0.001

59,276

4.61 (4.45–4.78)

5(0–39)

0–240

0.63 (0.51–0.79)

 < 0.001

66,459

5.01 (4.84–5.19)

5(0–45)

0–250

0.10 (0.07–0.15)

 < 0.001

Outdoor HLC

195

940

1.56 (1.18–2.00)

1(0–23)

0–139

1

 

3408

4.14 (3.48–4.91)

9(1–63)

0–143

1

 

3460

11.71 (10.15–13.48)

11(2–58)

0–86

1

 

HDT

136

5

0.02 (0.00–0.05)

0(0–0)

0–2

0.04 (0.01–0.14)

 < 0.001

189

0.77 (0.56–0.99)

0(0–7)

0–11

0.10 (0.07–0.15)

 < 0.001

526

2.33 (1.86–2.88)

3(0–12)

0–25

0.20 (0.14–0.29)

 < 0.001

  1. The geometric means were computed by exponentiating the arithmetic means of the log transformed nightly catches per trap. A value of 1 was added to the nightly figures of caught mosquitoes prior to the logarithmic transformation i.e. log (density + 1)
  2. †The adjusted mosquito sampling rate ratios (Adj. RR) and 95% confidence intervals (95%CI) were estimated from negative binomial regression models. The models included random effects for day and house, and fixed effects for the household size, livestock, house screening, IRS treatment, ITNs use, season (rainy or dry), and Study (1 or 2)
  3. 1* reference method